Journal
APPLIED CATALYSIS A-GENERAL
Volume 369, Issue 1-2, Pages 119-124Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2009.09.007
Keywords
Impedance; Perovskite; Ceria; Hydrocarbon; Fuel cell
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Funding
- Nissan Motor Co. Ltd
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The mechanisms of Ni, Pd and Pd-Ni catalysts in a solid oxide fuel cell (SOFC) were studied to clarify the alloying effects of Pd and Ni on the catalysis for the oxidation of CH4 fuel. Pd-Ni and Pd catalysts loaded on a composite anode of La0.8Sr0.2CrO3 (LSCr) and Ce0.8Sm0.2O1.9 (SDC) show catalytic activity for the oxidation of CH4. The impedance study for these anodes clearly suggests a difference between the reaction mechanisms on the Pd-Ni/and the Pd/LSCr-SDC anodes. The dominant reaction path for the methane activation seems to be a non-electrochemical process on the Pd-Ni catalyst, whereas the activation of CH4 over the Pd catalyst occurs only on electrochemically active sites. (C) 2009 Elsevier B.V. All rights reserved.
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