\u767a\u8868\u8ad6\u6587<\/h3>\n2019\u5e74<\/h4>\n\n\n- \u201cAmmonia-treated metal oxides as base catalysts for selective isomerization of glucose in water”<\/b>
Ryoichi Otomo, Momo Fujimoto, Masanori Nagao, Yuichi Kamiya
Molecular Catalysis<\/i>, 475 (2019) 110479.
\n DOI:10.1016\/j.mcat.2019.110479<\/a><\/b>
Abstract<\/b>
![\"\"](\"https:\/\/www.ees.hokudai.ac.jp\/ems\/staff\/kamiya\/wp-content\/uploads\/2021\/05\/2019-6.jpg\")
\n Various metal oxides (MgO, Al2<\/sub>O3<\/sub>, SiO2<\/sub>, TiO2<\/sub>, ZrO2<\/sub>, Nb2<\/sub>O5<\/sub>, and CeO2<\/sub>) were treated with NH3<\/sub>for incorporating nitrogen into the structure of metal oxides. The pristine and NH3<\/sub>–<\/sup>treated metal oxides were used as solid base catalysts for isomerization of glucose to f7ructose in water. SiO2<\/sub>and Nb2<\/sub>O5<\/sub>showed a large increment of nitrogen content by the treatment with NH3<\/sub>. FT-IR study on NH3<\/sub>–<\/sup>treated SiO2<\/sub>revealed that NH3<\/sub>reacted with terminal silanol groups and siloxane bonds to form Si-NH2<\/sub>and Si-NH-Si groups. Meanwhile, nitrogen was incorporated into bulk crystal of Nb2<\/sub>O5<\/sub>, causing amorphization of the crystal. Of all the samples, pristine and NH3<\/sub>–<\/sup>treated MgO showed highest catalytic activity for the isomerization of glucose. However, the selectivity to fructose was low due to subsequent reactions of formed fructose. Catalytic activity of Al2<\/sub>O3<\/sub>and SiO2<\/sub>was increased by the treatment with NH3<\/sub>, while that of the other metal oxides was not affected. Particularly, the catalytic activity of SiO2<\/sub>emerged after the treatment with NH3<\/sub>and was enhanced by increasing the temperature for the treatment up to 800\u00b0C. While fructose was consumed by subsequent reactions over MgO, decreasing the selectivity, such reactions of fructose were not noticeable over NH3<\/sub>–<\/sup>treated SiO2<\/sub>. Consequently, NH3<\/sub>–<\/sup>treated SiO2<\/sub>showed higher selectivity to fructose and gave higher carbon balance than MgO.\n <\/li>\n- \u201cDrastic change in selectivity caused by addition of oxygen to the hydrogen stream for the hydrogenation of nitrite in water over a supported platinum catalyst”<\/b>
Jun Hirayama, Kei-ichiro Yasuda, Sayaka Misu, Ryoichi Otomo, Yuichi Kamiya
Catalysis Science & Technology<\/i>, 9 (2019) 4017-4022.
\n DOI:10.1039\/C9CY00999J<\/a><\/b>
Abstract<\/b>
![\"\"](\"https:\/\/www.ees.hokudai.ac.jp\/ems\/staff\/kamiya\/wp-content\/uploads\/2021\/05\/2019-5.png\")
\n In the present study, we investigated the influence of the addition of O2<\/sub>to the H2<\/sub>reactant stream during the hydrogenation of NO2<\/sub>–<\/sup>in water on the catalytic performances of Al2<\/sub>O3<\/sub>–<\/sup>supported precious metal catalysts including Pd, Pt, Ir, Rh, and Ru with 0.3 mmol g–<\/sup>1<\/sup>of the metal. Pd\/Al2<\/sub>O3<\/sub>showed high selectivity for N2<\/sub>irrespective of the presence and absence of O2<\/sub>, and Rh and Ru\/Al2<\/sub>O3<\/sub>were inactive towards the hydrogenation of NO2<\/sub>–<\/sup>even in the absence of O2<\/sub>. In contrast, while Pt\/Al2<\/sub>O3<\/sub>showed high selectivity for NH3<\/sub>(90%) in the absence of O2<\/sub>(PH2<\/sub>= 0.2 atm and PO2<\/sub>= 0 atm), the product drastically changed to N2<\/sub>with 93% selectivity when O2<\/sub>was added (PH2<\/sub>= 0.2 atm and PO2<\/sub>= 0.1 atm). Since Pt\/Al2<\/sub>O3 was completely inactive towards the oxidation of NH3 with O2 in water under the reaction conditions, oxidative decomposition of the formed NH3<\/sub>was not the reason for the high selectivity for N2<\/sub>in the presence of O2<\/sub>. Kinetic analysis of the reaction in the absence and presence of O2<\/sub>and studies on the effects of the Pt size suggested that hydrogen atoms activated on the Pt particles were mainly consumed by O2<\/sub>upon H2<\/sub>O formation in the presence of O2<\/sub>. We concluded that the inactivation of the Pt sites active for NH3<\/sub>formation and furthermore the change in the function of the sites to N2<\/sub>formation caused by the O2<\/sub>addition lead to the drastic change in the selectivity from NH3<\/sub>to N2<\/sub>in the presence of O2<\/sub>.\n <\/li>\n- \u201cStrong Bronsted acid-modified chromium oxide as an efficient catalyst for the selective oxidation of methacrolein to methacrylic acid\u201d<\/b>
Shuhei Yasuda, Atsuki Iwakura, Jun Hirata, Mitsuru Kanno, Wataru Ninomiya, Ryoichi Otomo, Yuichi Kamiya
Catalysis Communications<\/i>, 125 (2019) 43-47.DOI:10.1016\/j.catcom.2019.03.020<\/a><\/b>
\n Abstract<\/b>
![\"\"](\"https:\/\/www.ees.hokudai.ac.jp\/ems\/staff\/kamiya\/wp-content\/uploads\/2021\/05\/2019-4.jpg\")
Gas-phase oxidation of methacrolein to methacrylic acid was carried out over an acid-modified Cr2<\/sub>O3<\/sub>\/SiO2<\/sub>catalyst. While only total oxidation occurred over bare Cr2<\/sub>O3<\/sub>\/SiO2<\/sub>, the acid-modified Cr2<\/sub>O3<\/sub>\/SiO2<\/sub>showed catalytic activity for the formation of methacrylic acid. In particular, H3<\/sub>PW12<\/sub>O40<\/sub>strong Bronsted acid was the most effective modifier for improving both activity and selectivity. The interface between Cr2<\/sub>O3<\/sub>and H3<\/sub>PW12<\/sub>O40<\/sub>particles on SiO2<\/sub>appears to be responsible for the formation of active sites for the selective formation of methacrylic acid. The strong Bronsted acid would help the activation of methacrolein through rendering it more electrophilic, which is a key step for the formation of methacrylic acid over the present catalyst.\n <\/li>\n- \u201cSelective Dehydration of 1,2-Propanediol to Propanal over Boron Phosphate Catalyst in the Presence of Steam\u201d<\/b>
Ryoichi Otomo, Chiaki Yamaguchi, Daiki Iwaisako, Shun Oyamada, Yuichi Kamiya
ACS Sustainable Chem. Eng.<\/i>, 7 (2019) 3, 3027-3033.DOI:10.1021\/acssuschemeng.8b04594<\/a><\/b>
Abstract<\/b>
![\"\"](\"https:\/\/www.ees.hokudai.ac.jp\/ems\/staff\/kamiya\/wp-content\/uploads\/2021\/05\/2019-3.jpg\")
Catalytic properties of metal phosphates were investigated for gas-phase dehydration of 1,2-propanediol to propanal in the presence and absence of steam in the temperature range of 150 – 340 \u00b0C. Boron, aluminum, and nickel phosphates showed promising catalytic activity for the dehydration reaction. Especially, boron phosphate showed outstanding catalytic activity at a low reaction temperature and high selectivity to propanal without formation of competitive dehydration products such as acetone and allyl alcohol. The catalytic activity of boron phosphate was remarkably enhanced in the presence of steam co-fed with 1,2-propanediol. The additional steam was also favorable for promoting hydrolysis of dioxolane, which is a by-product formed through acetalization of propanal, resulting in the high yield of propanal over 95%. Boron phosphate showed more durable catalytic activity and much higher yield of propanal than conventional solid acid catalysts such as ZSM-5, silica-alumina and niobium oxide that have been reported to be active for the dehydration of 1,2-propanediol.<\/li>\n- “Octyl and propylsulfonic acid co-fixed Fe3<\/sub>O4<\/sub>@SiO2<\/sub>as a magnetically separable, highly active and reusable solid acid catalyst in water”<\/b>
\n Nuryono Nuryono, Ani Qomariyah, Wontae Kim, Ryoichi Otomo, Bambang Rusdiarso, Yuichi Kamiya
Mol. Catal.<\/i>, 475 (2019) 110248 4985-4993.DOI:10.1016\/j.mcat.2018.11.019<\/a><\/b>
\n Abstract<\/b>
![\"\"](\"https:\/\/www.ees.hokudai.ac.jp\/ems\/staff\/kamiya\/wp-content\/uploads\/2021\/05\/2019-2.jpg\")
Modifications of propylsulfonic acid-fixed Fe3<\/sub>O4<\/sub>@SiO2<\/sub>with three organosilanes (C2<\/sub>, C8<\/sub>, and phenyl) were investigated to develop a magnetically separable solid acid catalyst active for hydrolysis of ethyl acetate in excess water. Among the organosilanes, triethoxy(octyl)silane was the best modifier for improvement in catalytic activity, with activity of approximately twice that of the unmodified catalyst. The catalytic activity was comparable to those of Cs2.5<\/sub>H0.5<\/sub>PW12<\/sub>O40<\/sub>and H3<\/sub>PW12<\/sub>O40<\/sub>anchored on hydrophobic SBA-15 if compared per acid sites, though the acid strength of sulfonic acid was much weaker than that of H3<\/sub>PW12<\/sub>O40<\/sub>. High hydrophobicity over the surface and around the acid sites created by the octyl group was responsible for the high catalytic activity and the high stability in water achieved. In addition to the improvement in catalytic activity, modification with the octyl group provided high stability for repeated uses of the catalyst in the reaction and there was little decrease in activity over at least four reuses. The catalyst was easily separated from the reaction solution by application of an external magnetic field.\n <\/li>\n- “The role of steam in selective oxidation of methacrolein over H3<\/sub>PMo12<\/sub>O40<\/sub>“<\/b>
Shuhei Yasuda, Jun Hirata, Mitsuru Kanno, Wataru Ninomiya, Ryoichi Otomo, Yuichi Kamiya
Appl. Catal. A<\/i>, 570 (2019) 164-172.DOI:10.1016\/j.apcata.2018.11.007<\/a><\/b>
Abstract<\/b>![\"\"](\"https:\/\/www.ees.hokudai.ac.jp\/ems\/staff\/kamiya\/wp-content\/uploads\/2021\/05\/2019-1.jpg\")
Role of steam in selective oxidation of methacrolein with molecular oxygen over H3<\/sub>PMo12<\/sub>O40<\/sub>catalyst was investigated. Addition of steam to feed gas significantly enhanced both catalytic activity and selectivity to methacrylic acid, which were fivefold and twice increases, respectively, under the optimal steam pressure (PH2O<\/sub>= 0.13 atm). Kinetic analysis demonstrated that the addition of steam caused 200-fold increase in the pre-exponential factor for the formation of methacrylic acid, leading to the significant increase in the activity. The steam in the feed gas varied hydrous state of H3<\/sub>PMo12<\/sub>O40<\/sub>under the reaction conditions, while did not alter redox property, molecular and crystalline structures, and surface area of the catalyst. In the presence of steam at 573 K, three H2<\/sub>O per one H3<\/sub>PMo12<\/sub>O40<\/sub>were absorbed and hydrated protons like [H3<\/sub>O]+<\/sup>were formed in the bulk of H3<\/sub>PMo12<\/sub>O40<\/sub>. Methacrolein was adsorbed on the surface of the hydrous catalyst, but not on anhydrous one at all. Based on the results, it was concluded that activation of methacrolein readily occurred on the catalyst in the presence of steam, leading to the significant increase in the pre-exponential factor. Quantum chemical calculation supported the smooth activation of methacrolein by the reaction with [H3<\/sub>O]+<\/sup>without any transition state.<\/li>\n- “Cs-Beta with an Al-rich composition as a highly active base catalyst for Knoevenagel condensation”<\/b>
Ryoichi Otomo, Ryota Osuga, Junko N. Kondo, Yuichi Kamiya, Toshiyuki Yokoi
Applied Catalysis A: General<\/i>, 575 (2019) 20-24.DOI:10.1016\/j.apcata.2019.02.014<\/a><\/b><\/li>\n- \u201cSTRAD project for systematic treatments of radioactive liquid wastes generated in nuclear facilities”<\/b>
Sou Watanabe, Hiromichi Ogi, Yoichi Arai, Haruka Aihara, Yoko Takahatake, Atsuhiro Shibata, Kazunori Nomura, Yuichi Kamiya, Noriko Asanuma, Haruaki Matuura, Toshio Kubota, Noriaki Seko, Tsuyoshi Arai, Tetsuji Moriguchi
Progress in Nuclear<\/i>, 117 (2019) 103090.DOI:10.1016\/j.pnucene.2019.103090<\/a><\/b><\/li>\n- \u201cEvaluation of Ti Distribution in Zeolite Framework Based on the Catalytic Activity for Alkene Epoxidation\u201d<\/b>
Xinyi Ji, Yunan Wang, Tsubasa Fujii, Ryoichi Otomo, Junko N. Kondo, and Toshiyuki Yokoi
Chemistry Letters, 48(2019) 1130-1133<\/i>,.DOI:10.1246\/cl.190387<\/a><\/b><\/li>\n<\/ul>\n<\/div>\n\u5b66\u4f1a\u767a\u8868<\/h3>\n2019\u5e74\u5ea6<\/h4>\n\n\n- \u7b2c35\u56de\u30bc\u30aa\u30e9\u30a4\u30c8\u7814\u7a76\u767a\u8868\u4f1a (12\u67085~6\u65e5\u3001\u6771\u4eac)<\/b>
(\u53e3\u982d\u767a\u8868) \u4e2d\u6751\u201c\u30d5\u30c3\u7d20\u3092\u4f7f\u3063\u305f\u30c9\u30e9\u30a4\u30b2\u30eb\u30b3\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3\u6cd5\u306b\u3088\u308bHf-Beta\u306e\u5408\u6210\u3068\u305d\u306e\u89e6\u5a92\u7279\u6027\u201d<\/li>\n- Internantional Symposium on Porous Material 2019 (11\u670817\u65e5~11\u670819\u65e5\u3001Japan\u30fbTokyo)<\/b>
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u5927\u53cb \u201cPromotional Effect of Fluorine on Incorporation of Hf into Zeolite Beta\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u9ec4 \u201cApplication of Water-resistant MOF for Catalytic Reaction in Water\u201d<\/li>\n- The 9th East Asia Joint Symposium on Environmental Catalysis and Eco-materials(11\u67085\u65e5~11\u67088\u65e5\u3001China\u30fbYancheng)<\/b>
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09Philip \u201cCatalytic ozonation of ammonia nitrogen in water over supported noble metal catalysts\u201d<\/li>\n- \u7b2c124\u56de\u89e6\u5a92\u8a0e\u8ad6\u4f1a (9\u670818\u65e5\uff5e9\u670820\u65e5\u3001\u9577\u5d0e)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u5289 \u201c\u62c5\u6301\u30eb\u30c6\u30cb\u30a6\u30e0 \u89e6\u5a92\u306b\u3088\u308b\u6c34\u4e2d\u904e\u5869\u7d20\u9178\u30a4\u30aa\u30f3 \u306e\u6c34\u7d20\u5316\u5206\u89e3\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u52a0\u85e4 \u201c\u91d1\u5c5e\u5fae\u7c92\u5b50\u3092\u5185 \u5305\u3057\u305f\u30a4\u30aa\u30f3\u4ea4\u63db\u6a39\u8102\u306b\u3088\u308b\u6c34 \u4e2d\u304b\u3089\u306e\u785d\u9178\u30a4\u30aa\u30f3\u9664\u53bb\u3068\u6c34\u7d20 \u5316\u5206\u89e3\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u4e2d\u6751 \u201c\u30d5\u30eb\u30d5\u30e9\u30fc\u30eb\u985e\u306e \u79fb\u52d5\u6c34\u7d20\u5316\u306b\u9ad8\u6d3b\u6027\u3092\u793a\u3059HfBeta\u306e\u30dd\u30b9\u30c8\u5408\u6210\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u9577\u5c3e \u201c\u30c1\u30bf\u30f3\u539f\u5b50\u4fa1\u304c\u9178 \u5316\u30c1\u30bf\u30f3\u306e\u9178\u89e6\u5a92\u7279\u6027\u306b\u53ca\u307c\u3059 \u5f71\u97ff\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u6a4b\u672c \u201cSn \u306b\u3088\u308b Fe \u306e\u90e8 \u5206\u7f6e\u63db\u304c SrFeO3\u306e\u30d9\u30f3\u30bc\u30f3\u9178\u5316 \u5206\u89e3\u6d3b\u6027\u306b\u4e0e\u3048\u308b\u52b9\u679c\u201d<\/li>\n- 14th European Congress on Catalysis (8\u670819\u65e5\uff5e8\u670823\u65e5\u3001Germany\u30fb Aachen)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u5927\u53cb \u201cAdjacent acid-base pair sites on silica surface created by hydrolysis of pre-anchored amide as an excellent catalyst for aldol condensation\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u9577\u5c3e \u201cHighly efficient synthesis of titanium suboxide nanoparticles for application as a novel heterogeneous catalyst\u201d<\/li>\n- \u7b2c\u516b\u56deAsia Pacific congress on catalysis (APCAT-8)(8\u67084\u65e5\uff5e8\u67087\u65e5\u3001\u30bf\u30a4\u30fb\u30d0\u30f3\u30b3\u30af)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u795e\u8c37 \u201cCeria-supported ruthenium catalyst for rapid reduction of perchlorate for water purification\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u30ad\u30e0 \u201cAdjacent acid-base pair sites on silica created by hydrolysis of preanchored amide as an excellent catalyst for aldol condensation\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09Philip \u201cWhat is the difference in reaction mechanism between in the presence of Co3O4 and MgO for ozonation of ammonia nitrogen in water?\u201d<\/li>\n- \u65e5\u672c\u5316\u5b66\u4f1a\u5317\u6d77\u9053\u652f\u90e82019\u5e74\u590f\u5b63\u7814\u7a76\u767a\u8868\u4f1a(7\u670820\u65e5\u3001\u82eb\u5c0f\u7267)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u4e2d\u6751 \u201c\u30d5\u30c3\u7d20\u3092\u6dfb\u52a0\u3057\u3066\u30dd\u30b9\u30c8\u5408\u6210\u3057\u305fHf-Beta\u306e\u30eb\u30a4\u30b9\u9178\u89e6\u5a92\u7279\u6027\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u9577\u5c3e \u201c\u56fa\u76f8\u5408\u6210\u3055\u308c\u305f\u4f4e\u539f\u5b50\u4fa1\u30c1\u30bf\u30f3\u9178\u5316\u7269\u306e\u89e6\u5a92\u7279\u6027\u201d<\/li>\n- Southeast Asia Catalysis Conference 2019 (5\u670823\u65e5\uff5e5\u670824\u65e5\u3001 Zolg)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09Philip \u201cPd\/CeO2 as a high-performance catalyst for ozonation of ammonio nitrogen in water at neutral\u201d<\/li>\n- \u7b2c17\u56de\u65e5\u97d3\u89e6\u5a92\u30b7\u30f3\u30dd\u30b8\u30a6\u30e0(5\u670821\u65e5\u3001 \u97d3\u56fd\u30fb\u6e08\u5dde\u5cf6)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u795e\u8c37 \u201cCeria-supported Ruthenium Catalyst as a Highly Active Catalyst for Reduction of Perchlorate in Water\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u5927\u53cb \u201cBoron Phosphate as a Highly Active and Selective Catalyst for Dehydration of 1,2-Propanediol\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u4e2d\u6751 \u201cFluoride-mediated synthesis of highly active Hf-Beta for MPV reduction\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u6a4b\u672c \u201cRedox properties and catalytic performance of a perovskite-type metal oxide SrFe1-xSnxO3\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u5c0f\u8239 \u201cCatalytic Reduction of Nitrate in Water over Alumina-Supported Nickel Catalyst\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u30ad\u30e0 \u201cAdjacent acid and base pair on silica created by hydrolysis of preanchored amide as a highly active catalyst for aldol condensation\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u9577\u5c3e \u201cHighly efficient synthesis of titanium suboxide nanoparticles for application to novel catalyst material\u201d<\/li>\n- \u7b2c123\u56de\u89e6\u5a92\u8a0e\u8ad6\u4f1a\uff083\u670820\u65e5\uff5e21\u65e5\u3001\u5927\u962a\uff09<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u5927\u53cb \u201c\u30bc\u30aa\u30e9\u30a4\u30c8\u4e0a\u3078\u306e\u9ad8\u6d3b\u6027Hf\u30b5\u30a4\u30c8\u306e\u5f62\u6210\u3092\u4fc3\u9032\u3059\u308b\u6dfb\u52a0\u30d5\u30c3\u7d20\u306e\u52b9\u679c\u201d<\/li>\n<\/ul>\n<\/div>\n\u8868\u5f70<\/h3>\n
\n
- \n
- \u201cAmmonia-treated metal oxides as base catalysts for selective isomerization of glucose in water”<\/b>
Ryoichi Otomo, Momo Fujimoto, Masanori Nagao, Yuichi Kamiya
Molecular Catalysis<\/i>, 475 (2019) 110479.
\n DOI:10.1016\/j.mcat.2019.110479<\/a><\/b>
Abstract<\/b>
\n Various metal oxides (MgO, Al2<\/sub>O3<\/sub>, SiO2<\/sub>, TiO2<\/sub>, ZrO2<\/sub>, Nb2<\/sub>O5<\/sub>, and CeO2<\/sub>) were treated with NH3<\/sub>for incorporating nitrogen into the structure of metal oxides. The pristine and NH3<\/sub>–<\/sup>treated metal oxides were used as solid base catalysts for isomerization of glucose to f7ructose in water. SiO2<\/sub>and Nb2<\/sub>O5<\/sub>showed a large increment of nitrogen content by the treatment with NH3<\/sub>. FT-IR study on NH3<\/sub>–<\/sup>treated SiO2<\/sub>revealed that NH3<\/sub>reacted with terminal silanol groups and siloxane bonds to form Si-NH2<\/sub>and Si-NH-Si groups. Meanwhile, nitrogen was incorporated into bulk crystal of Nb2<\/sub>O5<\/sub>, causing amorphization of the crystal. Of all the samples, pristine and NH3<\/sub>–<\/sup>treated MgO showed highest catalytic activity for the isomerization of glucose. However, the selectivity to fructose was low due to subsequent reactions of formed fructose. Catalytic activity of Al2<\/sub>O3<\/sub>and SiO2<\/sub>was increased by the treatment with NH3<\/sub>, while that of the other metal oxides was not affected. Particularly, the catalytic activity of SiO2<\/sub>emerged after the treatment with NH3<\/sub>and was enhanced by increasing the temperature for the treatment up to 800\u00b0C. While fructose was consumed by subsequent reactions over MgO, decreasing the selectivity, such reactions of fructose were not noticeable over NH3<\/sub>–<\/sup>treated SiO2<\/sub>. Consequently, NH3<\/sub>–<\/sup>treated SiO2<\/sub>showed higher selectivity to fructose and gave higher carbon balance than MgO.\n <\/li>\n- \u201cDrastic change in selectivity caused by addition of oxygen to the hydrogen stream for the hydrogenation of nitrite in water over a supported platinum catalyst”<\/b>
Jun Hirayama, Kei-ichiro Yasuda, Sayaka Misu, Ryoichi Otomo, Yuichi Kamiya
Catalysis Science & Technology<\/i>, 9 (2019) 4017-4022.
\n DOI:10.1039\/C9CY00999J<\/a><\/b>
Abstract<\/b>
\n In the present study, we investigated the influence of the addition of O2<\/sub>to the H2<\/sub>reactant stream during the hydrogenation of NO2<\/sub>–<\/sup>in water on the catalytic performances of Al2<\/sub>O3<\/sub>–<\/sup>supported precious metal catalysts including Pd, Pt, Ir, Rh, and Ru with 0.3 mmol g–<\/sup>1<\/sup>of the metal. Pd\/Al2<\/sub>O3<\/sub>showed high selectivity for N2<\/sub>irrespective of the presence and absence of O2<\/sub>, and Rh and Ru\/Al2<\/sub>O3<\/sub>were inactive towards the hydrogenation of NO2<\/sub>–<\/sup>even in the absence of O2<\/sub>. In contrast, while Pt\/Al2<\/sub>O3<\/sub>showed high selectivity for NH3<\/sub>(90%) in the absence of O2<\/sub>(PH2<\/sub>= 0.2 atm and PO2<\/sub>= 0 atm), the product drastically changed to N2<\/sub>with 93% selectivity when O2<\/sub>was added (PH2<\/sub>= 0.2 atm and PO2<\/sub>= 0.1 atm). Since Pt\/Al2<\/sub>O3 was completely inactive towards the oxidation of NH3 with O2 in water under the reaction conditions, oxidative decomposition of the formed NH3<\/sub>was not the reason for the high selectivity for N2<\/sub>in the presence of O2<\/sub>. Kinetic analysis of the reaction in the absence and presence of O2<\/sub>and studies on the effects of the Pt size suggested that hydrogen atoms activated on the Pt particles were mainly consumed by O2<\/sub>upon H2<\/sub>O formation in the presence of O2<\/sub>. We concluded that the inactivation of the Pt sites active for NH3<\/sub>formation and furthermore the change in the function of the sites to N2<\/sub>formation caused by the O2<\/sub>addition lead to the drastic change in the selectivity from NH3<\/sub>to N2<\/sub>in the presence of O2<\/sub>.\n <\/li>\n- \u201cStrong Bronsted acid-modified chromium oxide as an efficient catalyst for the selective oxidation of methacrolein to methacrylic acid\u201d<\/b>
Shuhei Yasuda, Atsuki Iwakura, Jun Hirata, Mitsuru Kanno, Wataru Ninomiya, Ryoichi Otomo, Yuichi Kamiya
Catalysis Communications<\/i>, 125 (2019) 43-47.DOI:10.1016\/j.catcom.2019.03.020<\/a><\/b>
\n Abstract<\/b>
Gas-phase oxidation of methacrolein to methacrylic acid was carried out over an acid-modified Cr2<\/sub>O3<\/sub>\/SiO2<\/sub>catalyst. While only total oxidation occurred over bare Cr2<\/sub>O3<\/sub>\/SiO2<\/sub>, the acid-modified Cr2<\/sub>O3<\/sub>\/SiO2<\/sub>showed catalytic activity for the formation of methacrylic acid. In particular, H3<\/sub>PW12<\/sub>O40<\/sub>strong Bronsted acid was the most effective modifier for improving both activity and selectivity. The interface between Cr2<\/sub>O3<\/sub>and H3<\/sub>PW12<\/sub>O40<\/sub>particles on SiO2<\/sub>appears to be responsible for the formation of active sites for the selective formation of methacrylic acid. The strong Bronsted acid would help the activation of methacrolein through rendering it more electrophilic, which is a key step for the formation of methacrylic acid over the present catalyst.\n <\/li>\n- \u201cSelective Dehydration of 1,2-Propanediol to Propanal over Boron Phosphate Catalyst in the Presence of Steam\u201d<\/b>
Ryoichi Otomo, Chiaki Yamaguchi, Daiki Iwaisako, Shun Oyamada, Yuichi Kamiya
ACS Sustainable Chem. Eng.<\/i>, 7 (2019) 3, 3027-3033.DOI:10.1021\/acssuschemeng.8b04594<\/a><\/b>
Abstract<\/b>
Catalytic properties of metal phosphates were investigated for gas-phase dehydration of 1,2-propanediol to propanal in the presence and absence of steam in the temperature range of 150 – 340 \u00b0C. Boron, aluminum, and nickel phosphates showed promising catalytic activity for the dehydration reaction. Especially, boron phosphate showed outstanding catalytic activity at a low reaction temperature and high selectivity to propanal without formation of competitive dehydration products such as acetone and allyl alcohol. The catalytic activity of boron phosphate was remarkably enhanced in the presence of steam co-fed with 1,2-propanediol. The additional steam was also favorable for promoting hydrolysis of dioxolane, which is a by-product formed through acetalization of propanal, resulting in the high yield of propanal over 95%. Boron phosphate showed more durable catalytic activity and much higher yield of propanal than conventional solid acid catalysts such as ZSM-5, silica-alumina and niobium oxide that have been reported to be active for the dehydration of 1,2-propanediol.<\/li>\n- “Octyl and propylsulfonic acid co-fixed Fe3<\/sub>O4<\/sub>@SiO2<\/sub>as a magnetically separable, highly active and reusable solid acid catalyst in water”<\/b>
\n Nuryono Nuryono, Ani Qomariyah, Wontae Kim, Ryoichi Otomo, Bambang Rusdiarso, Yuichi Kamiya
Mol. Catal.<\/i>, 475 (2019) 110248 4985-4993.DOI:10.1016\/j.mcat.2018.11.019<\/a><\/b>
\n Abstract<\/b>
Modifications of propylsulfonic acid-fixed Fe3<\/sub>O4<\/sub>@SiO2<\/sub>with three organosilanes (C2<\/sub>, C8<\/sub>, and phenyl) were investigated to develop a magnetically separable solid acid catalyst active for hydrolysis of ethyl acetate in excess water. Among the organosilanes, triethoxy(octyl)silane was the best modifier for improvement in catalytic activity, with activity of approximately twice that of the unmodified catalyst. The catalytic activity was comparable to those of Cs2.5<\/sub>H0.5<\/sub>PW12<\/sub>O40<\/sub>and H3<\/sub>PW12<\/sub>O40<\/sub>anchored on hydrophobic SBA-15 if compared per acid sites, though the acid strength of sulfonic acid was much weaker than that of H3<\/sub>PW12<\/sub>O40<\/sub>. High hydrophobicity over the surface and around the acid sites created by the octyl group was responsible for the high catalytic activity and the high stability in water achieved. In addition to the improvement in catalytic activity, modification with the octyl group provided high stability for repeated uses of the catalyst in the reaction and there was little decrease in activity over at least four reuses. The catalyst was easily separated from the reaction solution by application of an external magnetic field.\n <\/li>\n- “The role of steam in selective oxidation of methacrolein over H3<\/sub>PMo12<\/sub>O40<\/sub>“<\/b>
Shuhei Yasuda, Jun Hirata, Mitsuru Kanno, Wataru Ninomiya, Ryoichi Otomo, Yuichi Kamiya
Appl. Catal. A<\/i>, 570 (2019) 164-172.DOI:10.1016\/j.apcata.2018.11.007<\/a><\/b>
Abstract<\/b>
Role of steam in selective oxidation of methacrolein with molecular oxygen over H3<\/sub>PMo12<\/sub>O40<\/sub>catalyst was investigated. Addition of steam to feed gas significantly enhanced both catalytic activity and selectivity to methacrylic acid, which were fivefold and twice increases, respectively, under the optimal steam pressure (PH2O<\/sub>= 0.13 atm). Kinetic analysis demonstrated that the addition of steam caused 200-fold increase in the pre-exponential factor for the formation of methacrylic acid, leading to the significant increase in the activity. The steam in the feed gas varied hydrous state of H3<\/sub>PMo12<\/sub>O40<\/sub>under the reaction conditions, while did not alter redox property, molecular and crystalline structures, and surface area of the catalyst. In the presence of steam at 573 K, three H2<\/sub>O per one H3<\/sub>PMo12<\/sub>O40<\/sub>were absorbed and hydrated protons like [H3<\/sub>O]+<\/sup>were formed in the bulk of H3<\/sub>PMo12<\/sub>O40<\/sub>. Methacrolein was adsorbed on the surface of the hydrous catalyst, but not on anhydrous one at all. Based on the results, it was concluded that activation of methacrolein readily occurred on the catalyst in the presence of steam, leading to the significant increase in the pre-exponential factor. Quantum chemical calculation supported the smooth activation of methacrolein by the reaction with [H3<\/sub>O]+<\/sup>without any transition state.<\/li>\n- “Cs-Beta with an Al-rich composition as a highly active base catalyst for Knoevenagel condensation”<\/b>
Ryoichi Otomo, Ryota Osuga, Junko N. Kondo, Yuichi Kamiya, Toshiyuki Yokoi
Applied Catalysis A: General<\/i>, 575 (2019) 20-24.DOI:10.1016\/j.apcata.2019.02.014<\/a><\/b><\/li>\n- \u201cSTRAD project for systematic treatments of radioactive liquid wastes generated in nuclear facilities”<\/b>
Sou Watanabe, Hiromichi Ogi, Yoichi Arai, Haruka Aihara, Yoko Takahatake, Atsuhiro Shibata, Kazunori Nomura, Yuichi Kamiya, Noriko Asanuma, Haruaki Matuura, Toshio Kubota, Noriaki Seko, Tsuyoshi Arai, Tetsuji Moriguchi
Progress in Nuclear<\/i>, 117 (2019) 103090.DOI:10.1016\/j.pnucene.2019.103090<\/a><\/b><\/li>\n- \u201cEvaluation of Ti Distribution in Zeolite Framework Based on the Catalytic Activity for Alkene Epoxidation\u201d<\/b>
Xinyi Ji, Yunan Wang, Tsubasa Fujii, Ryoichi Otomo, Junko N. Kondo, and Toshiyuki Yokoi
Chemistry Letters, 48(2019) 1130-1133<\/i>,.DOI:10.1246\/cl.190387<\/a><\/b><\/li>\n<\/ul>\n<\/div>\n\u5b66\u4f1a\u767a\u8868<\/h3>\n
2019\u5e74\u5ea6<\/h4>\n
\n- \n
- \u7b2c35\u56de\u30bc\u30aa\u30e9\u30a4\u30c8\u7814\u7a76\u767a\u8868\u4f1a (12\u67085~6\u65e5\u3001\u6771\u4eac)<\/b>
(\u53e3\u982d\u767a\u8868) \u4e2d\u6751\u201c\u30d5\u30c3\u7d20\u3092\u4f7f\u3063\u305f\u30c9\u30e9\u30a4\u30b2\u30eb\u30b3\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3\u6cd5\u306b\u3088\u308bHf-Beta\u306e\u5408\u6210\u3068\u305d\u306e\u89e6\u5a92\u7279\u6027\u201d<\/li>\n- Internantional Symposium on Porous Material 2019 (11\u670817\u65e5~11\u670819\u65e5\u3001Japan\u30fbTokyo)<\/b>
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u5927\u53cb \u201cPromotional Effect of Fluorine on Incorporation of Hf into Zeolite Beta\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u9ec4 \u201cApplication of Water-resistant MOF for Catalytic Reaction in Water\u201d<\/li>\n- The 9th East Asia Joint Symposium on Environmental Catalysis and Eco-materials(11\u67085\u65e5~11\u67088\u65e5\u3001China\u30fbYancheng)<\/b>
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09Philip \u201cCatalytic ozonation of ammonia nitrogen in water over supported noble metal catalysts\u201d<\/li>\n- \u7b2c124\u56de\u89e6\u5a92\u8a0e\u8ad6\u4f1a (9\u670818\u65e5\uff5e9\u670820\u65e5\u3001\u9577\u5d0e)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u5289 \u201c\u62c5\u6301\u30eb\u30c6\u30cb\u30a6\u30e0 \u89e6\u5a92\u306b\u3088\u308b\u6c34\u4e2d\u904e\u5869\u7d20\u9178\u30a4\u30aa\u30f3 \u306e\u6c34\u7d20\u5316\u5206\u89e3\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u52a0\u85e4 \u201c\u91d1\u5c5e\u5fae\u7c92\u5b50\u3092\u5185 \u5305\u3057\u305f\u30a4\u30aa\u30f3\u4ea4\u63db\u6a39\u8102\u306b\u3088\u308b\u6c34 \u4e2d\u304b\u3089\u306e\u785d\u9178\u30a4\u30aa\u30f3\u9664\u53bb\u3068\u6c34\u7d20 \u5316\u5206\u89e3\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u4e2d\u6751 \u201c\u30d5\u30eb\u30d5\u30e9\u30fc\u30eb\u985e\u306e \u79fb\u52d5\u6c34\u7d20\u5316\u306b\u9ad8\u6d3b\u6027\u3092\u793a\u3059HfBeta\u306e\u30dd\u30b9\u30c8\u5408\u6210\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u9577\u5c3e \u201c\u30c1\u30bf\u30f3\u539f\u5b50\u4fa1\u304c\u9178 \u5316\u30c1\u30bf\u30f3\u306e\u9178\u89e6\u5a92\u7279\u6027\u306b\u53ca\u307c\u3059 \u5f71\u97ff\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u6a4b\u672c \u201cSn \u306b\u3088\u308b Fe \u306e\u90e8 \u5206\u7f6e\u63db\u304c SrFeO3\u306e\u30d9\u30f3\u30bc\u30f3\u9178\u5316 \u5206\u89e3\u6d3b\u6027\u306b\u4e0e\u3048\u308b\u52b9\u679c\u201d<\/li>\n- 14th European Congress on Catalysis (8\u670819\u65e5\uff5e8\u670823\u65e5\u3001Germany\u30fb Aachen)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u5927\u53cb \u201cAdjacent acid-base pair sites on silica surface created by hydrolysis of pre-anchored amide as an excellent catalyst for aldol condensation\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u9577\u5c3e \u201cHighly efficient synthesis of titanium suboxide nanoparticles for application as a novel heterogeneous catalyst\u201d<\/li>\n- \u7b2c\u516b\u56deAsia Pacific congress on catalysis (APCAT-8)(8\u67084\u65e5\uff5e8\u67087\u65e5\u3001\u30bf\u30a4\u30fb\u30d0\u30f3\u30b3\u30af)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u795e\u8c37 \u201cCeria-supported ruthenium catalyst for rapid reduction of perchlorate for water purification\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u30ad\u30e0 \u201cAdjacent acid-base pair sites on silica created by hydrolysis of preanchored amide as an excellent catalyst for aldol condensation\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09Philip \u201cWhat is the difference in reaction mechanism between in the presence of Co3O4 and MgO for ozonation of ammonia nitrogen in water?\u201d<\/li>\n- \u65e5\u672c\u5316\u5b66\u4f1a\u5317\u6d77\u9053\u652f\u90e82019\u5e74\u590f\u5b63\u7814\u7a76\u767a\u8868\u4f1a(7\u670820\u65e5\u3001\u82eb\u5c0f\u7267)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u4e2d\u6751 \u201c\u30d5\u30c3\u7d20\u3092\u6dfb\u52a0\u3057\u3066\u30dd\u30b9\u30c8\u5408\u6210\u3057\u305fHf-Beta\u306e\u30eb\u30a4\u30b9\u9178\u89e6\u5a92\u7279\u6027\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u9577\u5c3e \u201c\u56fa\u76f8\u5408\u6210\u3055\u308c\u305f\u4f4e\u539f\u5b50\u4fa1\u30c1\u30bf\u30f3\u9178\u5316\u7269\u306e\u89e6\u5a92\u7279\u6027\u201d<\/li>\n- Southeast Asia Catalysis Conference 2019 (5\u670823\u65e5\uff5e5\u670824\u65e5\u3001 Zolg)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09Philip \u201cPd\/CeO2 as a high-performance catalyst for ozonation of ammonio nitrogen in water at neutral\u201d<\/li>\n- \u7b2c17\u56de\u65e5\u97d3\u89e6\u5a92\u30b7\u30f3\u30dd\u30b8\u30a6\u30e0(5\u670821\u65e5\u3001 \u97d3\u56fd\u30fb\u6e08\u5dde\u5cf6)<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u795e\u8c37 \u201cCeria-supported Ruthenium Catalyst as a Highly Active Catalyst for Reduction of Perchlorate in Water\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u5927\u53cb \u201cBoron Phosphate as a Highly Active and Selective Catalyst for Dehydration of 1,2-Propanediol\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u4e2d\u6751 \u201cFluoride-mediated synthesis of highly active Hf-Beta for MPV reduction\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u6a4b\u672c \u201cRedox properties and catalytic performance of a perovskite-type metal oxide SrFe1-xSnxO3\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u5c0f\u8239 \u201cCatalytic Reduction of Nitrate in Water over Alumina-Supported Nickel Catalyst\u201d
\uff08\u30dd\u30b9\u30bf\u30fc\u767a\u8868\uff09\u30ad\u30e0 \u201cAdjacent acid and base pair on silica created by hydrolysis of preanchored amide as a highly active catalyst for aldol condensation\u201d
\uff08\u53e3\u982d\u767a\u8868\uff09\u9577\u5c3e \u201cHighly efficient synthesis of titanium suboxide nanoparticles for application to novel catalyst material\u201d<\/li>\n- \u7b2c123\u56de\u89e6\u5a92\u8a0e\u8ad6\u4f1a\uff083\u670820\u65e5\uff5e21\u65e5\u3001\u5927\u962a\uff09<\/b>
\uff08\u53e3\u982d\u767a\u8868\uff09\u5927\u53cb \u201c\u30bc\u30aa\u30e9\u30a4\u30c8\u4e0a\u3078\u306e\u9ad8\u6d3b\u6027Hf\u30b5\u30a4\u30c8\u306e\u5f62\u6210\u3092\u4fc3\u9032\u3059\u308b\u6dfb\u52a0\u30d5\u30c3\u7d20\u306e\u52b9\u679c\u201d<\/li>\n<\/ul>\n<\/div>\n\u8868\u5f70<\/h3>\n
- Internantional Symposium on Porous Material 2019 (11\u670817\u65e5~11\u670819\u65e5\u3001Japan\u30fbTokyo)<\/b>
- \u201cDrastic change in selectivity caused by addition of oxygen to the hydrogen stream for the hydrogenation of nitrite in water over a supported platinum catalyst”<\/b>