添加磷酸对硫化铜微/纳米管形貌及电催化CO2还原性能的影响

谈梦林; 黄千里; 刘咏

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

粉末冶金材料科学与工程 >

2025 , Vol. 30 >Issue 2: 148 - 156

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

工艺技术

添加磷酸对硫化铜微/纳米管形貌及电催化CO₂还原性能的影响

谈梦林 ,
黄千里 ,
刘咏

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中南大学粉末冶金研究院, 长沙 410083

收稿日期: 2024-12-30

修回日期: 2025-03-04

网络出版日期: 2025-04-15

基金资助

国家自然青年科学基金资助项目(52101295)

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Effects of adding phosphoric acid on the morphology and electrocatalytic CO₂ reduction properties of copper sulfide micro/nano-tubes

TAN Menglin ,
HUANG Qianli ,
LIU Yong

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Powder Metallurgy Research Institute, Central South University, Changsha 410083, China

Received date: 2024-12-30

Revised date: 2025-03-04

Online published: 2025-04-15

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摘要

通过电催化将CO₂转化为有附加价值的化学品是降低大气中CO₂浓度和缓解能源危机的一个有效方案。本文通过X射线衍射仪、扫描电镜、透射电镜、电化学实验等,研究添加磷酸对CuS微/纳米管微观形貌与电催化CO₂还原性能的影响。结果表明：添加磷酸导致微/纳米管的长度变短、外径变小,且其组成单元纳米片变薄。微/纳米管尺寸的减小有助于暴露更多活性位点,从而提高电催化CO₂还原性能,在-1.0 V时其液相产物甲酸的法拉第效率可达68%。本工作有望为电催化CO₂还原催化剂的设计与制备提供指导。

关键词： 硫化铜微/纳米管电催化剂; 水热合成; 磷酸; 二氧化碳转化; 甲酸

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谈梦林 , 黄千里 , 刘咏 . 添加磷酸对硫化铜微/纳米管形貌及电催化CO₂还原性能的影响[J]. 粉末冶金材料科学与工程, 2025 , 30(2) : 148 -156 . DOI: 10.19976/j.cnki.43-1448/TF.2024118

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

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