Rate-determining elementary step of oxygen reduction reaction at (La,Sr)CoO3-based cathode surface
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- 作者：Shogo Miyoshi ; miyoshi@alto.material.t.u-tokyo.ac.jp" class="auth_mail" title="E-mail the corresponding author ; Ayano Takeshita ; Satoshi Okada ; Shu Yamaguchi
- 关键词：Surface reaction ; ORR ; Rate determining step ; LSC ; Solid oxide fuel cell ; LaCoO3
- 刊名：Solid State Ionics
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：285
- 期：Complete
- 页码：202-208
- 全文大小：874 K
文摘
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Oxygen reduction reaction (ORR) mechanism studied on dense LSC electrodes with EIS.
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Reaction kinetics (area-specific conductance) show the universal Po2 exponent, 1/2.
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Po2 exponents derived for elementary reactions are compared with the experiments.
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Rate-determining step is reaction between surface peroxide ion and oxygen vacancy.
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Availability of the reactants determines the cathode reaction kinetics.