Mechanism insight into enhanced oxygen reduction reaction over heterovalent ion incorporated pyrochlore Pr2Zr2O7 for direct ammonia solid oxide fuel cells

Huihuang Fang,Shiqing Yang, Weijie Ye,Fulan Zhong,Yu Luo,Shaorong Wang,Chongqi Chen,Lilong Jiang

Chemical Engineering Science（2024）

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摘要

•Sc doping effectively induces B-site cation defects in pyrochlore PZSc.•Bond energy of 48f-oxygen ions in octahedral [ZrO6] units incorporated is elaborated.•DA-SOFC with PZSc-based cathode offers 1.46 W·cm−2 at 800 °C and 0.44 W·cm−2 at 600 °C.•Mechanism insight into PZSc cathode for DA-SOFC is definitely elucidated.

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关键词

Pyrochlore,Structural distortion,Direct ammonia solid oxide fuel cell,Distribution of relaxation time

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