期刊
SCIENCE CHINA-MATERIALS
卷 64, 期 8, 页码 1900-1909出版社
SCIENCE PRESS
DOI: 10.1007/s40843-020-1583-4
关键词
hierarchically porous structure; single-atom alloy; electrochemical carbon dioxide reduction; gold-copper alloy; operando X-ray absorption spectroscopy
资金
- National Natural Science Foundation of China [51771072]
- Youth 1000 Talent Program of China [799229034]
- Outstanding Youth Scientist Foundation of Hunan Province [2020JJ2006]
- Fundamental Research Funds for the Central Universities
- Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project [71860007]
- Hunan Provincial Innovation Foundation for Postgraduate [CX20190312]
The study presents a highly efficient CO2 reduction electrocatalyst with excellent CO Faraday efficiency and stability, showing great potential for practical applications.
Electrochemical CO2 reduction is a promising technology for solving the CO2 emission problems and producing value-added products. Here, we report a hierarchically porous Cu1Au single-atom alloy (SAA) as an efficient electrocatalyst for CO2 reduction. Benefiting from the hierarchically porous architectures with abundant vacancies as well as three-dimensional accessible active sites, the as-prepared nanoporous Cu1Au SAA catalyst shows remarkable CO(2 )reduction performance with nearly 100% CO Faraday efficiency in a wide potential range (-0.4 to -0.9 V vs. reversible hydrogen electrode. The in-situ X-ray absorption spectroscopy studies and density functional theory calculations reveal that the Cu-Au interface sites serve as the intrinsic active centers, which can facilitate the activated adsorption of CO(2 )and stabilize the *COOH intermediate.
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