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Enhanced photocatalytic CO2 reduction to methane over WO(3)(.)0.33H(2)O via Mo doping
Wang, Haipeng; Zhang, Ling; Wang, Kefu; Sun, Xiang; Wang, Wenzhong
2019-04-01
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume243Pages:771
SubtypeArticle
AbstractPhotocatalytic CO2 reduction is a promising strategy to address environmental and energy issues that are vexing the modem society. However, the efficiency of CO2 photoreduction into fuels such as methane (CH4) is substantially restricted by high CO2 activation barrier and inefficient proton supply. Here, Mo-doped WO(3)(.)0.33H(2)O nanorods have been synthesized and Mo doping in WO(3)(.)0.33H(2)O dramatically increased the CH4 production yield by 5.2 times from 1.02 to 5.3 mu mol g(cat)(-1) h(-1) under water vapor without the assistant of any sacrificial agent or noble metal. The Mo doping proves capable of facilitating CO2 activation by improving the ability to store and localize photogenerated electrons and boosting the transfer of photoexcited electrons to adsorbed CO2. In addition, proton and electron insertion converts WO(3)(.)0.33H(2)O into tungsten bronze (H(x)WO(3)(.)0.33H(2)O) under light irradiation, guaranteeing required electrons and protons for CO2 reduction. The enhanced water oxidation of Mo-doped WO(3)(.)0.33H(2)O promotes proton supply and insertion process, improving the hydrogenation process of the carbon intermediate to generate CH4. The combined action of the enhanced CO2 activation and water oxidation with efficient proton and electron insertion improves the performance of CO2 photoreduction to CH4. This work might help to shed light on deeper insights into the design of CO2 photoreduction catalysts.
KeywordCO2 photoreduction Mo doping CO2 activation Water oxidation Proton insertion
DOI10.1016/j.apcatb.2018.11.021
Language英语
WOS Research AreaChemistry ; Engineering
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27250
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Wang, Haipeng,Zhang, Ling,Wang, Kefu,et al. Enhanced photocatalytic CO2 reduction to methane over WO(3)(.)0.33H(2)O via Mo doping[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2019,243:771.
APA Wang, Haipeng,Zhang, Ling,Wang, Kefu,Sun, Xiang,&Wang, Wenzhong.(2019).Enhanced photocatalytic CO2 reduction to methane over WO(3)(.)0.33H(2)O via Mo doping.APPLIED CATALYSIS B-ENVIRONMENTAL,243,771.
MLA Wang, Haipeng,et al."Enhanced photocatalytic CO2 reduction to methane over WO(3)(.)0.33H(2)O via Mo doping".APPLIED CATALYSIS B-ENVIRONMENTAL 243(2019):771.
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