In situ thermolysis of Pt-carbonyl complex to form supported clean Pt nanoclusters with enhanced catalytic performance

详细信息    查看全文

• 作者：Guijuan Wei 魏桂涓 ; Xixia Zhao 赵西夏 ; Changhua An 安长华 ; Junxue Liu 刘俊学…
• 关键词：hydrogenation ; nanoclusters ; reduced graphene oxide ; platinum ; catalyst
• 刊名：Science China Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：60
• 期：2
• 页码：131-140
• 全文大小：4955KB
• 刊物类别：Materials Science, general; Chemistry/Food Science, general;
• 刊物主题：Materials Science, general; Chemistry/Food Science, general;
• 出版者：Science China Press
• ISSN：2199-4501
• 卷排序：60

文摘

Clean Pt nanoclusters with a diameter of 1.0–2.4 nm, supported on reduced graphene oxide (rGO) nanosheets, were successfully synthesized by simple in situ thermolysis of a Pt-carbonyl complex. The supported Pt nanoclusters are in an electron-deficient state because of the electron transfer between the nanoclusters and the rGO sheets. The as-prepared Pt-1 nm/rGO shows high catalytic activity for the 100% selective hydrogenation of nitrobenzene, with the turnover frequency (TOF) reaching 975.4 h−1 at 25°C and 1 atm. This number is higher than the previously reported value for the heterogeneously catalyzed hydrogenation of nitrobenzene. The proposed process follows a direct hydrogenation mechanism, as is revealed by the analyses of the intermediate products. This work presents a facile and effective synthetic approach for achieving highly efficient nanocatalysts, and can be extended to obtain other metal catalysts with ultra-small sizes and excellent performance.