J. Mater. Sci. Technol. ›› 2025, Vol. 212: 303-311.DOI: 10.1016/j.jmst.2024.06.010

• Research Article • Previous Articles     Next Articles

Highly oxygen reduction activity and CO2 resistance of Fe-based cathode electrocatalysts for solid oxide fuel cells

Zunxing Chua, Juntao Gaoa, Qiang Lia,*, Tian Xiaa, Liping Sun a, Hui Zhaoa,*, Ivan V. Kovalevb, Rostislav D. Guskovb, Mikhail P. Popovb, A.P. Nemudryb   

  1. aKey Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China;
    bInstitute of Solid State Chemistry and Mechanochemistry SB RAS, st. Kutateladze, 18, 630090 Novosibirsk, Novosibirsk region, Russia
  • Received:2024-04-09 Revised:2024-06-03 Accepted:2024-06-04 Published:2025-03-20 Online:2025-03-14
  • Contact: *E-mail addresses: liqiang@hlju.edu.cn (Q. Li), zhaohui98@hlju.edu.cn (H. Zhao)

Abstract: The insufficient electrocatalytic activity and CO2 resistance hinder the application of cathode mate-rial for solid oxide fuel cells (SOFCs). In this study, we introduce a series of Pr-doped perovskite Bi0.8-x Prx Ca0.2 FeO3-δ(BPCF x, x = 0, 0.10, 0.15, 0.20) as candidate cathode materials, with a focus on its phase structure, oxygen desorption ability, catalytic activity, and electrochemical reduction kinetics. Among all the components, the Bi0.6 Pr0.2 Ca0.2 FeO3-δ(BPCF0.20) catalyst shows impressive oxygen reduc-tion reaction (ORR) activity, with a low polarization resistance of 0.06 Ω cm2 at 700 ℃ and peak power density of 810 mW cm-2 at 800 ℃. Moreover, the BPCF0.20 cathode shows outstanding CO2 resistance in different CO2 concentrations (1%-10%) due to the larger average bond energy and higher relative acidity of Bi, Pr, and Fe ions. These findings demonstrate that BPCFx are advanced cathode electrocatalysts for SOFCs.

Key words: Solid oxide fuel cells, Cathode electrocatalysts, Oxygen reduction reaction, CO2 resistance