文献类型：期刊文献

英文题名：Photo-reduction of CO2 Using a Rhenium Complex Covalently Supported on a Graphene/TiO2 Composite

作者：Cui, Shi-Cong[1];Sun, Xue-Zhong[2];Liu, Jin-Gang[1]

机构：[1]East China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[2]Univ Nottingham, Sch Chem, Univ Pk, Nottingham NG7 2RD, England

年份：2016

卷号：9

期号：13

起止页码：1698

外文期刊名：CHEMSUSCHEM

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000380336800020)】；

基金：This study was financially supported by the NSF of China (no. 21571063, 21571062, 21271072), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, and the Shanghai Pujiang Program (no. 13J1401900).

语种：英文

外文关键词：CO2 photoreduction; graphene oxide; photocatalyst; rhenium; titanium dioxide

摘要：One of the promising solutions for decreasing atmospheric CO2 is artificial photosynthesis, in which CO2 can be photoconverted into solar fuels. In this study, a rhenium complex Re(PyBn)(CO)(3)Cl (PyBn=1-(2-picolyl)-4-phenyl-1H-1,2,3-triazole) was covalently grafted onto the surface of reduced graphene oxide (rGO). This was further combined with TiO2 to fabricate a novel catalyst composite TiO2-rGO-Re(PyBn)(CO)(3)Cl for CO2 photo-reduction. This hybrid composite demonstrated high selectivity conversion of CO2 into CO under xenon-lamp irradiation. Compared with the unsupported homogeneous catalyst Re(PyBn)(CO)(3)Cl, the covalent immobilized catalyst composite TiO2-rGO-Re(PyBn)(CO)(3)Cl enhanced the turnover number six times and significantly improved catalyst stability. During the process of CO2 photo-reduction, intermediate species with lifetimes longer than hundreds of microseconds were observed and the formation of CO products was revealed using timeresolved infrared spectroscopy. A plausible mechanism for CO2 photo-reduction by the TiO2-rGO-Re(PyBn)(CO)(3)Cl catalyst composite has been suggested. The obtained results have implications for the future design of efficient catalyst composites for CO2 photo-conversion.