Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 32, Pages 36128-36136Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c09240
Keywords
nanosheet; tin; CuO; electrocatalyst; CO2
Funding
- National Natural Science Foundation of China [51902357]
- Natural Science Foundation of Guangdong Province, China [2019A1515012143]
- Shenzhen fundamental research funding [JCYJ20160530185817133, JCYJ20160331115312355, JCYJ20160331115147389]
- NSQKJJ [K20799112]
- Start-up Funds for High-Level Talents of Sun Yat-sen University [38000-18841209]
- Fundamental Research Funds for the Central Universities [19lgpy153]
- National Supercomputer Center in Guangzhou
- National Supercomputing Center in Shenzhen (Shenzhen Cloud Computing Center)
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Electrochemical reduction of CO2 was a widespread method for CO2 conversion into valuable chemical fuel. C2H4 is an important product from CO2 reduction. However, conversion of CO2 into the hydrocarbon C2H4 faced large energy barriers. Herein, we, for the first time, achieve a high efficiency for electrochemical conversion of CO2 to C2H4 on a tin-modified CuO. By modifying with Sn, we obtained a related low onset potential of C2H4 as positive as -0.8 V versus RHE and a high Faradaic efficiency of C2H4 as high as 22% at -1.0 V (vs RHE). According to density functional calculation, the Sn dopant mainly enriched the electron density of CuO, while it was electron-poor in the Sn dopants. The rate of CO2 reduction can be enhanced on Cu nanosheets with higher electron density. We believed that this work would promote the development of two-dimensional catalysts for CO(2 )conversion and deepen the understanding of doping on CO2 reduction.
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