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- W1559914892 abstract "Anode performance and reaction sites on LaCrO 3 based oxides, SrZrO 3 based oxides, and ceria based oxides were evaluated by means of AC impedance and steady state polarization measurements in H 2 -H 2 O-Ar gas mixtures. All oxide anodes tended to show poorer performance than Ni/YSZ cermet anode which is a popular anode for solid oxide fuel cells. Ceria based oxide showed relatively high performance among these oxides. Extraordinary large capacitance was observed in the LaCrO 3 based oxide and ceria based oxide anodes. The measured large capacitance is considered to be a kind of chemical capacitance due to oxygen nonstoichiometry of the electrode material. It means that the electrode reaction proceeds via O 2- diffusion through the electrode particles, which is mixed ionic and electronic conductor. Further semi-quantitative analysis indicated that O 2- diffuses through almost all particles in the electrode layer. The reaction site of hydrogen oxidation could be either distributed on the whole surface of the electrode particles or located at the interface of the current collector and the electrode layer. They also imply that Au current collector might act as a catalyst and is not appropriate for evaluation of oxide anodes." @default.
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- W1559914892 date "2008-03-26" @default.
- W1559914892 modified "2023-09-26" @default.
- W1559914892 title "Electrochemical Charactarization and Identification of Reaction Sites in Oxide Anodes" @default.
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- W1559914892 doi "https://doi.org/10.1002/9780470291337.ch19" @default.
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