Molybdate Based Ceramic Negative-Electrode Materials for Solid Oxide Cells

Publication: Research - peer-reviewConference article – Annual report year: 2010

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Novel molybdate materials with varying Mo valence were synthesized as possible negative-electrode materials for solid oxide cells. The phase, stability, microstructure and electrical conductivity were characterized. The electrochemical activity for H2O and CO2 reduction and H2 and CO oxidation was studied using simplified geometry point-contact electrodes. Unique phenomena were observed for some of the materials - they decomposed into multiple phases and formed a nanostructured surface upon exposure to operating conditions (in certain reducing atmospheres). The new phases and surface features enhanced the electrocatalytic activity and electronic conductivity. The polarization resistances of the best molybdates were two orders of magnitude lower than that of donor-doped strontium titanates. Many of the molybdate materials were significantly activated by cathodic polarization, and they exhibited higher performance for cathodic (electrolysis) polarization than for anodic (fuel cell) polarization, which makes them especially interesting for use in electrolysis electrodes. ©2010 COPYRIGHT ECS - The Electrochemical Society
Original languageEnglish
JournalE C S Transactions
Publication date2010
Volume28
Issue11
Pages173-192
ISSN1938-5862
DOIs
StatePublished

Conference

Conference217th ECS Meeting
Number217
CountryCanada
CityVancouver
Period25/04/1030/04/10
Internet addresshttp://www.electrochem.org/meetings/biannual/217/217.htm

Bibliographical note

© The Electrochemical Society, Inc. 2010. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in ECS Transactions.

CitationsWeb of Science® Times Cited: 6

Keywords

  • Solid Oxide Fuel Cells, Fuel Cells and Hydrogen
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