期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 358, 期 -, 页码 416-421出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2017.10.002
关键词
Heterogeneous photocatalyst; CO2 reduction; Artificial photosynthesis
资金
- MEXT KAKENHI [17H06440, 17H06433]
LaTa7O19 (BG: 4.1 eV) and CaTa4O11 (BC: 4.5 eV) with laminated structures consisting of layers of TaO6 octahedra and TaO7 decahedra were active for CO2 reduction to form CO using water as an electron donor when an Ag cocatalyst of an efficient CO2 reduction site was loaded. In contrast, the activity for the CO2 reduction of CaZiTi(2)O(7) (BG: 3.6 eV) with an anion-defect-type fluorite structure consisting of TiO4 tetrahedra, TiO6 octahedra, and ZrO7 decahedra was negligible even when the Ag cocatalyst was introduced. Selectivity for the CO formation (CO/(H-2 + CO)) over the optimized Ag/LaTa7O19 photocatalyst reached around 95% in an aqueous NaHCO3 solution. The rate of CO formation gradually decreased with a reaction time accompanied by an increase in the rate of H-2 evolution. The results of scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS) revealed that aggregation of the Ag cocatalyst during the photocatalytic CO2 reduction caused the decrease in the CO formation. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据