文献类型：期刊文献

英文题名：Stable Isolated Metal Atoms as Active Sites for Photocatalytic Hydrogen Evolution

作者：Xing, Jun[1];Chen, Jian Fu[2,3];Li, Yu Hang[1];Yuan, Wen Tao[4,5];Zhou, Ying[6];Zheng, Li Rong[7];Wang, Hai Feng[2,3];Hu, P.[2,3,8];Wang, Yun[9];Zhao, Hui Jun[9];Wang, Yong[4,5];Yang, Hua Gui[1,9]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Ctr Computat Chem, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[4]Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China;[5]Zhejiang Univ, Ctr Electron Microscopy, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China;[6]Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Peoples R China;[7]Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China;[8]Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT9 5AG, Antrim, North Ireland;[9]Griffith Univ, Ctr Clean Environm & Energy, Nathan, Qld 4222, Australia

年份：2014

卷号：20

期号：8

起止页码：2138

外文期刊名：CHEMISTRY-A EUROPEAN JOURNAL

收录：;EI(收录号：20140817348866);WOS:【SCI-EXPANDED(收录号:WOS:000330903700003)】；

基金：This work was financially supported by the National Natural Science Foundation of China (91022023, 21076076), SRF for ROCS and SEM, Programme for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Major Basic Research Programme of Science and Technology Commission of Shanghai Municipality (10JC1403200) and the Australian Research Council's Future Fellowships (FT120100913).

语种：英文

外文关键词：noble metals; photocatalysis; single atom; titanium; water splitting

摘要：The process of using solar energy to split water to produce hydrogen assisted by an inorganic semiconductor is crucial for solving our energy crisis and environmental problems in the future. However, most semiconductor photocatalysts would not exhibit excellent photocatalytic activity without loading suitable co-catalysts. Generally, the noble metals have been widely applied as co-catalysts, but always agglomerate during the loading process or photocatalytic reaction. Therefore, the utilization efficiency of the noble co-catalysts is still very low on a per metal atom basis if no obvious size effect exists, because heterogeneous catalytic reactions occur on the surface active atoms. Here, for the first time, we have synthesized isolated metal atoms (Pt, Pd, Rh, or Ru) stably by anchoring on TiO2, a model photocatalystic system, by a facile one-step method. The isolated metal atom based photocatalysts show excellent stability for H-2 evolution and can lead to a 6-13-fold increase in photocatalytic activity over the metal clusters loaded on TiO2 by the traditional method. Furthermore, the configurations of isolated atoms as well as the originality of their unusual stability were analyzed by a collaborative work from both experiments and theoretical calculations.