Direct-current-induced transformation at the interface between platinum anode and holmium-doped ceria electrolyte

Ou, Ding Rong, Mori, Toshiyuki, Ye, Fei, Zou, Jin and Drennan, John (2009) Direct-current-induced transformation at the interface between platinum anode and holmium-doped ceria electrolyte. Journal of Applied Physics, 105 11: 113524.1-113524.5. doi:10.1063/1.3142263

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Author Ou, Ding Rong
Mori, Toshiyuki
Ye, Fei
Zou, Jin
Drennan, John
Title Direct-current-induced transformation at the interface between platinum anode and holmium-doped ceria electrolyte
Journal name Journal of Applied Physics   Check publisher's open access policy
ISSN 0021-8979
1089-7550
Publication date 2009-06-01
Year available 2009
Sub-type Article (original research)
DOI 10.1063/1.3142263
Open Access Status File (Publisher version)
Volume 105
Issue 11
Start page 113524.1
End page 113524.5
Total pages 5
Editor J. P. Viccaro
Place of publication College Park, MD, United States
Publisher American Institute of Physics
Language eng
Subject C1
970109 Expanding Knowledge in Engineering
970110 Expanding Knowledge in Technology
850404 Solid Oxide Fuel Cells
091201 Ceramics
100712 Nanoscale Characterisation
Abstract Under the influence of a direct current (dc), phase transformation could take place at the interface between platinum anode and holmium-doped ceria (HDC) electrolyte at temperature ≥ 600 °C. This transformation is insensitive to the doping concentration and the sintering temperature, but strongly depends on the testing temperature. As a result of the dc-induced transformation, products with a size up to hundreds of microns were separated from the anode-side surface and, correspondingly, circular holes with diameters varied from tens to hundreds of microns remained on the surface. Compared with original HDC samples, a high degree of local ordering of oxygen vacancies was found in most of the products. Based on structural and compositional studies, it is suggested that the dc-induced transformation could be attributed to the electrochemical reaction at the anode/electrolyte interface and the mobility of Ho cations promoted by the current.
Keyword Physics, Applied
Physics
PHYSICS, APPLIED
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 03 Sep 2009, 17:55:58 EST by Mr Andrew Martlew on behalf of Centre for Microscopy and Microanalysis