华东师范大学学报(自然科学版) ›› 2023, Vol. 2023 ›› Issue (1): 129-139.doi: 10.3969/j.issn.1000-5641.2023.01.013

• CO2资源化利用 • 上一篇    

电沉积制备铜基催化剂及其对CO2电还原的催化性能

楚萌恩1,2(), 陈春俊3, 吴海虹1,2,*(), 何鸣元1,2, 韩布兴1,2,3   

  1. 1. 华东师范大学 化学与分子工程学院 上海市绿色化学和化工过程绿色化重点实验室, 上海 200062
    2. 崇明生态研究院, 上海 202162
    3. 中国科学院 化学研究所 胶体、界面与化学热力学重点实验室, 北京 100190
  • 收稿日期:2022-07-15 接受日期:2022-07-15 出版日期:2023-01-25 发布日期:2023-01-07
  • 通讯作者: 吴海虹 E-mail:mengcme@163.com;hhwu@chem.ecnu.edu.cn
  • 作者简介:楚萌恩, 女, 博士研究生, 研究方向为电催化还原二氧化碳. E-mail: mengcme@163.com
  • 基金资助:
    国家重点研发项目(2017YFA0403102); 华东师范大学“幸福之花”先导研究基金(2020ST2203)

Electrodeposition performance of a copper-based catalyst for the electroreduction of CO2

Meng’en CHU1,2(), Chunjun CHEN3, Haihong WU1,2,*(), Mingyuan HE1,2, Buxing HAN1,2,3   

  1. 1. Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
    2. Institute of Eco-Chongming, Shanghai 202162, China
    3. CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2022-07-15 Accepted:2022-07-15 Online:2023-01-25 Published:2023-01-07
  • Contact: Haihong WU E-mail:mengcme@163.com;hhwu@chem.ecnu.edu.cn

摘要:

为了提高铜基催化剂电还原CO2的催化性能, 以氮三乙酸(nitrilotriacetic acid, NTA)为添加剂, 通过电沉积法制备了具有三维结构的铜基催化剂, 该催化剂具有优异的电还原CO2制备多碳(C2+)产物的选择性和活性. 在 –1.26 V vs. RHE (reversible hydrogen electrode)时, 乙烯(C2H4)和C2+ 产物的法拉第效率(faradaic efficiency, FE)分别能达到44.0%和61.6%, 此时总电流密度(current density)为12.3 mA·cm–2. 此外, 在NTA的作用下, 运用电沉积法制备的Pd和Zn基催化剂具有良好的电还原CO2为CO的性能, 表明NTA作为添加剂在电沉积法制备金属催化剂方面具有一定的普适性.

关键词: 电催化, 二氧化碳, 铜基催化剂, 电沉积

Abstract:

To improve the catalytic performance of copper-based catalysts in the electroreduction of CO2, nitrotriacetic acid (NTA) was used as an additive to prepare copper-based catalysts having a three-dimensional structure by applying electrodeposition. The prepared catalysts exhibited excellent selectivity and activity for the electroreduction of CO2 to multi-carbon (C2+) products. At –1.26 V vs. RHE, the faradaic efficiency of C2H4 and C2+ products over the Cu-0.5/CP electrode reached 44.0% and 61.6%, respectively, and the total current density reached 12.3 mA·cm–2. In addition, Pd- and Zn-based catalysts were prepared by employing electrodeposition; the results showed that their selectivity for CO was significantly improved, proving that NTA has a certain universality in the preparation of electrocatalysts by using electrodeposition.

Key words: electroreduction, carbon dioxide, copper-based catalysts, ethylene

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