Oxygen reduction kinetics of high performance BaCo<sub>0.4</sub>Fe<sub>0.4</sub>M<sub>0.1</sub>Y<sub>0.1</sub>O<sub>3-δ</sub> (M = Mg, Zr) positrode for protonic ceramic fuel cells.
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ABSTRACT: Protonic ceramic fuel cells (PCFCs) should exhibit high performance at intermediate temperatures in the range of 400-600 °C. To reduce the operating temperature, more active air electrodes (positrodes) are needed. In the present work, BaCo0.4Fe0.4Mg0.1Y0.1O3-δ (BCFMY) is investigated as a positrode material for application in PCFCs as well as solid oxide fuel cells (SOFCs). For SOFCs, the polarization resistance ascribed to the oxygen reduction reaction is proportional to pO2-1/4 (pO2: oxygen partial pressure), suggesting that the rate-determining process is the charge transfer on the mixed ionic-electronic conductors. For PCFCs, this polarization resistance is proportional to pO2-
SUBMITTER: Sumi H
PROVIDER: S-EPMC11890574 | biostudies-literature | 2025 Mar
REPOSITORIES: biostudies-literature
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