添加磷酸对硫化铜微/纳米管形貌及电催化CO<sub>2</sub>还原性能的影响

doi:10.19976/j.cnki.43-1448/TF.2024118

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Abstract The conversion of CO₂ into chemicals with added value through electrocatalysis is an effective solution for reducing atmospheric CO₂ concentration and alleviating the energy crisis. In this paper, the effects of adding phosphoric acid on the microscopic morphology and electrocatalytic CO₂ reduction properties of CuS micro/nano-tubes were investigated by X-ray diffractometer, scanning electron microscope, transmission electron microscope, and electrochemical experiments. The results show that the addition of phosphoric acid leads to shorter lengths, smaller outer diameters, and thinner constituent unit nanosheets of micro/nano-tubes. The reduced micro/nano-tube size helps to expose more active sites, which improves the electrocatalytic CO₂ reduction properties with a Faraday efficiency of the liquid-phase product formic acid up to 68% at -1.0 V. This work is expected to provide guidance for the design and preparation of catalysts for electrocatalytic CO₂ reduction.

Key words： copper sulfide micro/nano-tube electrocatalyst hydrothermal synthesis phosphoric acid carbon dioxide conversion formic acid

Received: 30 December 2024 Published: 15 April 2025

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	TAN Menglin
	HUANG Qianli
	LIU Yong

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TAN Menglin,HUANG Qianli,LIU Yong. Effects of adding phosphoric acid on the morphology and electrocatalytic CO₂ reduction properties of copper sulfide micro/nano-tubes[J]. Materials Science and Engineering of Powder Metallurgy, 2025, 30(2): 148-156.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2024118 OR http://pmbjb.csu.edu.cn/EN/Y2025/V30/I2/148

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