Issue 12, 2002

Microspectroscopy at a moving reduction front in zirconia solid electrolyte

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.

Article information

Article type
Paper
Submitted
01 Nov 2001
Accepted
17 Jan 2002
First published
14 May 2002

Phys. Chem. Chem. Phys., 2002,4, 2673-2679

Microspectroscopy at a moving reduction front in zirconia solid electrolyte

B. Luerßen, J. Janek, S. Günther, M. Kiskinova and R. Imbihl, Phys. Chem. Chem. Phys., 2002, 4, 2673 DOI: 10.1039/B109893D

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