Microspectroscopy at a moving reduction front in zirconia solid electrolyte

Literature Information

Publication Date 2002-05-14
DOI 10.1039/B109893D
Impact Factor 3.676
Authors

B. Luerßen, J. Janek, S. Günther, M. Kiskinova, R. Imbihl


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Abstract

Employing photoelectron emission microscopy (PEEM) and scanning photoelectron microscopy (SPEM) the surface reduction of zirconia solid electrolyte under cathodic polarisation has been observed in situ. A microstructured platinum film and a porous platinum paste have been used as electrodes. Starting from the three phase boundary (tpb) between platinum, solid electrolyte and the gas phase, a reduction front was detected in PEEM by a significant local work function decrease. Local XPS shows that zirconia has been reduced behind the front, resulting in the presence of Zr atoms in a low oxidation state and Zr0.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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