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2021 , Vol. 36 >Issue 11: 1145 - 1153

DOI: https://doi.org/10.15541/jim20210092

研究论文

CuO/ZnO复合电催化剂的制备及其还原CO2制合成气

  • 张清明 ,
  • 朱敏 ,
  • 周晓霞
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  • 1.上海理工大学 材料科学与工程学院, 上海 200093
    2.中国科学院 上海硅酸盐研究所, 上海 200050
张清明(1995-), 男, 硕士研究生. E-mail: 18271648276@163.com
周晓霞, 副研究员. E-mail: zhouxiaoxia@mail.sic.ac.cn

收稿日期: 2021-02-13

  修回日期: 2021-03-30

  网络出版日期: 2021-03-15

基金资助

国家自然科学基金(51961165107);上海国际合作项目(19520761000);上海市自然科学基金(19ZR1464500)

收起

CuO/ZnO Composite Electrocatalyst: Preparation and Reduction of CO2 to Syngas

  • Qingming ZHANG ,
  • Min ZHU ,
  • Xiaoxia ZHOU
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  • 1. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
    2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
ZHANG Qingming(1995-), male, Master candidate. E-mail: 18271648276@163.com
ZHOU Xiaoxia, associate professor. E-mail: zhouxiaoxia@mail.sic.ac.cn

Received date: 2021-02-13

  Revised date: 2021-03-30

  Online published: 2021-03-15

Supported by

National Natural Science Foundation of China(51961165107);Shanghai International Cooperation Project(19520761000);Shanghai Natural Science Foundation(19ZR1464500)

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摘要

二氧化碳(CO2)还原制备合成气(CO和H2混合气), 不仅可以实现碳循环降低温室效应, 而且能缓解能源危机。而实现CO2资源化利用的关键在于催化剂设计。本研究采用金属离子共沉淀法制备了CuO及CuO/ZnO复合氧化物纳米材料, 通过调节催化剂组分, 探究其在不同电势下电化学CO2还原制备合成气的性能。结果表明: 引入锌(Zn)物种可以减弱中间物CO2•-在催化剂上的吸附强度, 导致CO的法拉第效率(FE)降低, 氢气FE增加, 从而实现不同电势下合成气CO/H2在1/1~1/4范围内的可控调节。尤其是, 当前驱液中铜和锌配比为1 : 2时, 在-0.9 V (vs. RHE)的电势下, CO和H2总FE高达84%。

关键词： CO2还原; 合成气; CuO/ZnO; 中间物CO2•-

本文引用格式

张清明 , 朱敏 , 周晓霞 . CuO/ZnO复合电催化剂的制备及其还原CO2制合成气[J]. 无机材料学报, 2021 , 36(11) : 1145 -1153 . DOI: 10.15541/jim20210092

Abstract

The reduction of carbon dioxide (CO2) to syngas (a mixture of CO and H2) can not only realize the carbon cycle and decrease the greenhouse effect but also alleviate the energy crisis. Design of catalyst is the key to realize CO2 resource utilization. Herein, CuO and CuO/ZnO composite were prepared by metal ion co-precipitation method, and their performance of electrochemical CO2 reduction to syngas under different potentials was investigated by adjusting the catalyst components. The results show that the introduction of zinc (Zn) species can decrease the adsorption intensity of intermediate CO2•- on the catalyst, which leads to the decrease of Faraday efficiency (FE) of CO and the increase of FE of H2, thus achieving controllable regulation of CO/H2 in the range of 1/1-1/4 under different applied electrochemical potential. In particular, the total FE of syngas CO/H2 is up to 84% when the ratio of Cu to Zn in the precursor solution is 1 : 2.

Key words： CO2 reduction; syngas; CuO/ZnO; intermediate CO2•-

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