期刊
ADVANCED MATERIALS
卷 28, 期 23, 页码 4692-4697出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201506333
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资金
- Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-AC02-76SF00515]
- U.S. Department of Energy through the Sandia Laboratory Directed Research and Development program [DE-AC04-94AL85000]
- Office of Science, and Office of Basic Energy Sciences, of the US Department of Energy [DE-AC02-05CH11231]
The volumetric redox (chemical) capacitance of the surface of CeO2-delta films is quantified in situ to be 100-fold larger than the bulk values under catalytically relevant conditions. Sm addition slightly lowers the surface oxygen nonstoichiometry, but effects a 10-fold enhancement in surface chemical capacitance by mitigating defect interactions, highlighting the importance of differential nonstoichiometry for catalysis.
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