Acta Phys. -Chim. Sin. ›› 2024, Vol. 40 ›› Issue (4): 2305026.doi: 10.3866/PKU.WHXB202305026

Special Issue: Carbon Dioxide Valorization

• ARTICLE • Previous Articles     Next Articles

Metal-Organic Framework-Derived Nickel Nanoparticles for Efficient CO2 Electroreduction in Wide Potential Windows

Bizhu Shao1, Huijun Dong1, Yunnan Gong1,*(), Jianhua Mei1, Fengshi Cai1, Jinbiao Liu2,*(), Dichang Zhong1,*(), Tongbu Lu1   

  1. 1 Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
    2 School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China
  • Received:2023-05-12 Revised:2023-06-08 Accepted:2023-06-08 Published:2023-06-16
  • Contact: Email: yngong@email.tjut.edu.cn (Yunnan Gong)liujinbiao007@126.com (Jinbiao Liu)dczhong@email.tjut.edu.cn (Dichang Zhong)
  • Supported by:
    the National Key R & D Program of China(2022YFA1502902); National Natural Science Foundation of China(22271218); National Natural Science Foundation of China(22071182); National Natural Science Foundation of China(22001043); National Natural Science Foundation of China(21931007); Natural Science Foundation of Tianjin City(20JCYBJC00380)

Abstract:

The electrocatalytic carbon dioxide (CO2) reduction has gained recognition as an outstanding approach for transforming CO2 into renewable energy products. To accomplish this reduction reaction, the development of efficient electrocatalysts is required. Nickel-based electrocatalysts have been extensively investigated for CO2 reduction; however, nickel nanoparticles (NiNPs) have demonstrated limited catalytic performance. In this study, NiNPs implanted in N-doped porous carbon (NiNPs-NC) were prepared by thermal treatment of nickel metal-organic framework, urea, and carbon black under an N2 atmosphere. The NiNPs-NC exhibited high catalytic performance for the electroreduction of CO2 to CO in both H-type and flow cells. In the H-type cell, the CO faradaic efficiencies (FEs) of NiNPs-NC exceeded 90% in the potential window from −0.67 to −1.07 V vs. reversible hydrogen electrode (RHE), reaching a maximum CO FE of approximately 100% at −0.87 V vs. RHE. In the flow cell, the CO selectivities of NiNPs-NC exceeded 95% in the potential window from −0.50 to −0.70 V vs. RHE. The fast charge transfer, as demonstrated by electrochemical impedance spectroscopy and Tafel slope, can be attributed to the high catalytic activity of NiNPs-NC. This study provides a simple method to develop highly efficient catalysts for electrocatalytic CO2 reduction.

Key words: Nickel nanoparticle, Electrocatalyst, CO2 reduction, Metal-organic framework, Thermal treatment