Effect of calcium doping on the electrocatalytic activity of the Bi1−xCaxFeO3−δ oxygen electrode for solid oxide fuel cells† † Electronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d2ra06750a

ABSTRACT: For solid oxide fuel cell (SOFC) applications, there remains a growing interest in developing efficient cathode catalysts. Herein, iron-based Ca-doped Bi1−xCaxFeO3−δ (BCFx, x = 0.1, 0.2, and 0.3) oxides are evaluated as potential cathode materials for SOFCs. The phase structure, thermal expansion behavior, electrical conductivity, and electrocatalytic properties for the oxygen reduction reaction (ORR) of the BCFx cathodes are systematically characterized. Among all compositions, the Bi0.8Ca0.2FeO3−δ (BCF0.2) cathode exhibits the highest oxygen vacancy concentration and considerable electrocatalytic activity, demonstrating the lowest polarization resistance (0.11 Ω cm2) and largest exchange current density of 41.91 mA cm−2 at 700 °C. The BCF0.2 cathode-based single cell delivers excellent o

SUBMITTER: Wang L 

PROVIDER: S-EPMC9841442 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature