Clean Pt nanoclusters with a diameter of1.0-2.4 nm,supported on reduced graphene oxide（rGO）nanosheets,were successfully synthesized by simple in situ thermolysis of a Pt-carbonyl complex.The supported Pt nanocluster...Clean Pt nanoclusters with a diameter of1.0-2.4 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℃ 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.展开更多
基金supported by the National Natural Science Foundation of China(51402362 and 21471160)Shandong Provincial Natural Science Foundation,China(ZR2014EMQ012 and ZR2016BM12)+1 种基金the Fundamental Research Funds for the Central Universities(15CX08010A,16CX05016 and 16CX05014A)start-up fund from Tianjin University of Technology
文摘Clean Pt nanoclusters with a diameter of1.0-2.4 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℃ 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.
