能源化学(英文版)

能源化学(英文版) ›› 2019, Vol. 38 ›› Issue (11): 114-118.DOI: 10.1016/j.jechem.2019.01.010

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ZrO2 nanoparticles anchored on nitrogen-doped carbon nanosheets as efficient catalyst for electrochemical CO2 reduction

Zhengpei Miao, Pei Hu, Chuanye Nie, Huan Xie, Wenli Fu, Qing Li   

  1. State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
  • 收稿日期:2018-11-18 修回日期:2019-01-09 出版日期:2019-11-15 发布日期:2020-12-18
  • 通讯作者: Pei Hu, hupeisysdoing@hust.edu.cn; Qing Li, qing_li@hust.edu.cn
  • 基金资助:
    This work was supported by National Key R&D Program of China (2016YFB0901600), the National Natural Science Foundation of China (51772313, U1830113 and 51802334).

ZrO2 nanoparticles anchored on nitrogen-doped carbon nanosheets as efficient catalyst for electrochemical CO2 reduction

Zhengpei Miao, Pei Hu, Chuanye Nie, Huan Xie, Wenli Fu, Qing Li   

  1. State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
  • Received:2018-11-18 Revised:2019-01-09 Online:2019-11-15 Published:2020-12-18
  • Contact: Pei Hu, hupeisysdoing@hust.edu.cn; Qing Li, qing_li@hust.edu.cn
  • Supported by:
    This work was supported by National Key R&D Program of China (2016YFB0901600), the National Natural Science Foundation of China (51772313, U1830113 and 51802334).

摘要： Electrochemical reduction of CO2 to produce value-added feedstock chemicals using high-performance electrocatalysts is a promising protocol to address the excessive CO2 in the atmosphere and the energy crisis. However, the high overpotential, low current density, and poor product selectivity for CO2 electroreduction greatly impede their practical applications. In this work, we develop an efficient catalyst for CO2 reduction to CO consisting of well-dispersed ZrO2 nanoparticles tightly anchored on nitrogendoped carbon nanosheets (ZrO2/N-C) for the first time. Importantly, the ZrO2 nanoparticles possess oxygen vacancies and defects, which regulate the electronic structure of catalyst and thus greatly enhance the electrocatalytic activity. Specifically, ZrO2/N-C demonstrates a high CO Faradaic efficiency (FE) of 64% at -0.4 V vs. the reversible hydrogen electrode (RHE) and a respectable current density of ~2.6 mA cm-2 in CO2-saturated 0.5 M KHCO3 solution. This work opens a new avenue for developing excellent catalysts for CO2 electroreduction with metal oxide/heteroatom-doped carbon composite structure.

关键词: Zirconium oxide, CO2 reduction, Electrocatalysis, Nitrogen doping, Faradaic efficiency

Abstract: Electrochemical reduction of CO2 to produce value-added feedstock chemicals using high-performance electrocatalysts is a promising protocol to address the excessive CO2 in the atmosphere and the energy crisis. However, the high overpotential, low current density, and poor product selectivity for CO2 electroreduction greatly impede their practical applications. In this work, we develop an efficient catalyst for CO2 reduction to CO consisting of well-dispersed ZrO2 nanoparticles tightly anchored on nitrogendoped carbon nanosheets (ZrO2/N-C) for the first time. Importantly, the ZrO2 nanoparticles possess oxygen vacancies and defects, which regulate the electronic structure of catalyst and thus greatly enhance the electrocatalytic activity. Specifically, ZrO2/N-C demonstrates a high CO Faradaic efficiency (FE) of 64% at -0.4 V vs. the reversible hydrogen electrode (RHE) and a respectable current density of ~2.6 mA cm-2 in CO2-saturated 0.5 M KHCO3 solution. This work opens a new avenue for developing excellent catalysts for CO2 electroreduction with metal oxide/heteroatom-doped carbon composite structure.

Key words: Zirconium oxide, CO2 reduction, Electrocatalysis, Nitrogen doping, Faradaic efficiency