Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7722143 | International Journal of Hydrogen Energy | 2013 | 5 Pages |
Abstract
Ba0.5Sr0.5Co0.8Fe0.2O3 perovskite oxide has been synthesized by a sol-gel method, and characterized by XRD, SEM, BET. This oxide has a porous structure and a specific surface area of 2.78Â m2Â gâ1. The catalytic activity of the oxide for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) in 0.1Â M KOH solution has been studied by using a rotating ring-disk electrode (RRDE) technique. RRDE results show that the ORR mainly favors a direct four electron pathway, and a maximum cathodic current density of 6.25Â mAÂ cmâ2 at 2500Â rpm was obtained, which is close to the behavior of Pt/C (20Â wt% Pt on carbon) electrocatalyst in the same testing conditions. Compared with pure C electrode, BSCF is more active for OER, a lower onset potential for OER and a bigger anodic current at the same applied potential are observed.
Related Topics
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Authors
Chao Jin, Xuecheng Cao, Fanliang Lu, Zhenrong Yang, Ruizhi Yang,