电解工艺条件对Cu基催化剂电化学还原CO<sub>2</sub>的产物分布影响

doi:10.11896/cldb.23100052

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Abstract With industrial thriving development, the consumption of fossil energy has increased the carbon dioxide (CO₂) content in the atmosphere, and the preparation of high value-added chemicals by electroreduction of CO₂ (CO₂RR) not only solves the problems caused by greenhouse gases, but also can alleviate the energy crisis. Copper-based catalyst is one of the effective catalysts currently used for CO₂RR. In this work, Cu₂O was prepared by hydrothermal treatment of copper sheet surface to CO₂RR to formic acid and carbon monoxide, and the effects of electrolyte concentration, CO₂ pressure, and electrolyte temperature on the distribution of electrochemical reduction products were systematically investigated. It was found that the decrease of electrolyte concentration and the increase of CO₂ pressure could inhibit the hydrogen evolution reaction, and the increase of electrolyte temperature was favorable for the generation of CO. When the electrolyte concentration was 1 mol/L, the temperature was 30 ℃, and the pressure of CO₂ was 55 atm, the formic acid Faraday efficiency reached more than 70% and up to 83.6% in the -0.7—-1.2 V (vs. RHE) test voltage range. When the electrolyte temperature increased from 30 ℃ to 80 ℃ at -0.9 V (vs.RHE), the formic acid Faraday efficiency decreases from 80% to 49.7%, while the CO Faraday efficiency increases from 4.4% to 39.2%, which shows that the formic acid Faraday efficiency decreases with the increase of electrolyte temperature.

Key words： electrochemical reduction carbon dioxide copper catalyst HCOOH CO

Published: 25 December 2024 Online: 2024-12-20

CLC number:

TQ150

Fund:Major Scientific and Technological Innovation Project of Shandong Province (2020CXGC010402),the Young Potential Program of Shanghai Institute of Applied Physics,Chinese Academy of Sciences (SINAP-YXJH-2022008)

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	Articles by authors
	GAO Na
	PANG Peiqi
	LI Zhi
	MOU Guodong
	CUI Tiancheng
	DU Xianlong
	LI Tao
	XIAO Guoping

Cite this article:

GAO Na,PANG Peiqi,LI Zhi, et al. Study of Process Parameters Effects on Product Distribution of CO₂ Electroreduction over Cu-based Catalysts[J]. Materials Reports, 2024, 38(24): 23100052-5.

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http://www.mater-rep.com/EN/10.11896/cldb.23100052 OR http://www.mater-rep.com/EN/Y2024/V38/I24/23100052

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