Journal
JOURNAL OF POWER SOURCES
Volume 222, Issue -, Pages 123-128Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2012.08.084
Keywords
Solid oxide fuel cells; Composite anode; Strontium vanadate; Lanthanum vanadate; Redox stability
Funding
- U.S. Department of Energy's Hydrogen Fuel Initiative [DE-FG02-05ER15721]
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The deactivation upon oxidative treatments of solid oxide fuel cell (SOFC) anodes based on La0.7Sr0.3VO3.85 with a Pd/ceria catalyst is examined using electrodes formed by infiltration of La0.7Sr0.3VO3.85, Pd, and ceria into porous yttria-stabilized zirconia (YSZ). Based on XRD results, performance measurements of cells made with varying La:Sr:V ratios, and Pd dispersion measurements using CO adsorption, we conclude that La0.7Sr0.3VO3.85 is kinetically unstable upon reduction-oxidation treatments at 973 K, forming molten, strontium-vanadate phases that partially cover the catalytic component. Deactivation can be minimized using V-deficient compositions. (C) 2012 Elsevier B.V. All rights reserved.
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