Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (7): 1710-1718.DOI: 10.1016/S1872-2067(21)63960-8

• Special column on catalytic conversion of CO 2 Previous Articles     Next Articles

Highly dispersed nickel species on iron-based perovskite for CO2 electrolysis in solid oxide electrolysis cell

Yingjie Zhoua,b, Tianfu Liub, Yuefeng Songb, Houfu Lvb, Qingxue Liub,c, Na Tab, Xiaomin Zhangb,#(), Guoxiong Wangb,*()   

  1. aState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
    bState Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
    cUniversity of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2021-08-31 Accepted:2021-10-09 Online:2022-07-18 Published:2022-05-20
  • Contact: Xiaomin Zhang, Guoxiong Wang
  • About author:Guoxiong Wang (Dalian Institute of Chemical Physics, Chinese Academy of Science) was invited as a young member of the 5th and 6th Editorial Board of Chin. J. Catal. Prof. Guoxiong Wang received his B.A. degree from Wuhan University (China) in 2000, and Ph.D. degree from Dalian Institute of Chemical Physics, Chinese Academy of Sciences in 2006. He carried out postdoctoral research Catalysis Research Center in Hokkaido University (Japan) from 2007 to 2010. Since the end of 2010, he has been working in State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. He is Distinguished Young Scholars Recipients of National Natural Science Foundation of China (2021) and outstanding member of youth innovation promotion association of Chinese Academy of Sciences (2019). His research interests mainly focus on electrocatalysis, especially electrochemical conversion of CO2, CO and CH4. He has published more than 120 peer-reviewed papers.
  • Supported by:
    National Natural Science Foundation of China(22072146);National Natural Science Foundation of China(22005045);DNL Cooperation Fund, CAS(DNL201923);Fundamental Research Funds for the Central Universities(2232020D-07);Initial Research Funds for Young Teachers of Donghua University.

Abstract:

Feasible construction of cathode materials with highly dispersed active sites can extend the triple-phase boundaries, and therefore leading to enhanced electrode kinetics for CO2 electrolysis in solid oxide electrolysis cell (SOEC). Herein, highly dispersed nickel species with low loading (1.0 wt%) were trapped within the La0.8Sr0.2FeO3-δ-Ce0.8Sm0.2O2-δ via a facial mechanical milling approach, which demonstrated excellent CO2 electrolysis performance. The highly dispersed nickel species can significantly alter the electronic structures of the LSF-SDC without affecting its porous network and facilitate oxygen vacancy formation, thus greatly promote the CO2 electrolysis performance. The highest current density of 1.53 A·cm-2 could be achieved when operated under 800 °C at 1.6 V, which is about 91% higher than the LSF-SDC counterpart.

Key words: CO2 electrolysis, Solid oxide electrolysis cells, Perovskite oxide, Nickel species