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- Title
High‐Curvature Transition‐Metal Chalcogenide Nanostructures with a Pronounced Proximity Effect Enable Fast and Selective CO<sub>2</sub> Electroreduction.
- Authors
Gao, Fei‐Yue; Hu, Shao‐Jin; Zhang, Xiao‐Long; Zheng, Ya‐Rong; Wang, Hui‐Juan; Niu, Zhuang‐Zhuang; Yang, Peng‐Peng; Bao, Rui‐Cheng; Ma, Tao; Dang, Zheng; Guan, Yong; Zheng, Xu‐Sheng; Zheng, Xiao; Zhu, Jun‐Fa; Gao, Min‐Rui; Yu, Shu‐Hong
- Abstract
A considerable challenge in the conversion of carbon dioxide into useful fuels comes from the activation of CO2 to CO2.− or other intermediates, which often requires precious‐metal catalysts, high overpotentials, and/or electrolyte additives (e.g. ionic liquids). We report a microwave heating strategy for synthesizing a transition‐metal chalcogenide nanostructure that efficiently catalyzes CO2 electroreduction to carbon monoxide (CO). We found that the cadmium sulfide (CdS) nanoneedle arrays exhibit an unprecedented current density of 212 mA cm−2 with 95.5±4.0 % CO Faraday efficiency at −1.2 V versus a reversible hydrogen electrode (RHE; without iR correction). Experimental and computational studies show that the high‐curvature CdS nanostructured catalyst has a pronounced proximity effect which gives rise to large electric field enhancement, which can concentrate alkali‐metal cations resulting in the enhanced CO2 electroreduction efficiency.
- Subjects
ELECTROLYTIC reduction; STANDARD hydrogen electrode; CADMIUM sulfide; CARBON monoxide; ELECTRIC fields; TRANSITION metals; PRECIOUS metals
- Publication
Angewandte Chemie, 2020, Vol 132, Issue 22, p8784
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201912348