Spontaneous stress-induced oxidation of Ce ions in Gd-doped ceria at room temperature

  title={Spontaneous stress-induced oxidation of Ce ions in Gd-doped ceria at room temperature},
  author={Christopher Munnings and Sukhvinder P.S. Badwal and Daniel Fini},
Cerium oxides are widely used within catalysis and fuel cells. The key parameters of interest, including catalytic activity, transport properties and defect structure are all fundamentally linked to the oxidation state of the cerium ions within the material which can adopt a 3+ or 4+ oxidation state. We use Raman spectroscopy, as well as scanning and optical microscopy to show that the oxidation state of cerium ions within Ce0.8Gd0.2O2−x can be altered either through chemically induced strain… 
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