The role of electron transfer behavior induced by CO chemisorption on visible-light-driven CO conversion over WO3 and CuWO4/WO3

被引：33
|
作者：
Wang, Zhongming [1 ,2 ]
Wang, Xiaoxiao [1 ,2 ]
Wang, Hong [1 ,2 ]
Chen, Xun [1 ]
Dai, Wenxin [1 ,2 ]
Fu, Xianzhi [1 ]
机构：
[1] Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Res Inst Photocatalysis, Fuzhou 350002, Peoples R China
[2] Fujian Prov Univ, Fuzhou Univ, Key Lab Ecomat Adv Technol, Fuzhou 350002, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 265卷
基金：
中国国家自然科学基金;
关键词：
CO oxidation & reduction; CO chemisorption; Electron transfer; Photo-assisted gas response; DFT calculations; UV-IRRADIATION; OXIDATION; CATALYSTS; METHANATION; ADSORPTION; GAS; NANOPARTICLES; REDUCTION; OXIDE; TIO2;
D O I：
10.1016/j.apcatb.2020.118588
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Visible-light-driven CO conversion has attracted many research efforts. Herein we study the reaction mechanism from the perspective of electron transfer behavior during CO adsorption (CO (ad)). The WO3 and CuWO4/WO3 films were in-situ synthesized, and then were investigated their behaviors for adsorbing CO and catalyzing CO conversion under visible light via gas sensing system and in-situ DRIFTS testing, respectively. It was found that the CO (ad) at W5+-W5+ site will form bridge adsorbed CO species over WO3, and donate electrons to W5+, resulting in its light-driven oxidation by O-2. The CO (ad) at W-0 site forms linear and gem-dicarbonyl adsorbed CO species over CuWO4/WO3, and accept electrons from W-0, then its reduction by H-2. The result shows the light-driven CO oxidation or reduction on WO3 and CuWO4/WO3 would be somewhat dependent on the electron transfer behavior induced by different modes of CO chemisorption and the Fermi level of sample itself.
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页数：15
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