Journal
JOURNAL OF POWER SOURCES
Volume 196, Issue 6, Pages 3089-3094Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.12.050
Keywords
SOFC; Oxide anode; Palladium; Perovskite; Catalyst
Funding
- Department of Energy [DE-FG02-05ER46255]
- National Science Foundation [CBET-0854223]
- Petroleum Research Fund
- E.I. Dupont de Nemours Co.
- Dow Chemical Company
- State of Illinois
- US Department of Energy. Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [854223] Funding Source: National Science Foundation
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Composite anodes consisting of Pd-substituted (La,Sr)CrO3-delta mixed with 50 wt% Ce0.9Gd0.1O2-delta were tested in La0.9Sr0.1Ga0.8Mg0.2O3-delta-electrolyte supported fuel cells at 800 degrees C with humidified H-2 fuel. Low anode polarization resistance was observed during the first several hours of operation, explained by the nucleation of Pd nano-particles on perovskite particle surfaces. Anode performance then degraded gradually before stabilizing. Redox cycling repeatedly restored the anodes to their initial peak performance, followed again by degradation. This regenerative behavior was explained by the observation that the Pd nano-particles were removed by oxidation, and then re-nucleated upon reduction. (C) 2010 Published by Elsevier B.V.
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