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Research at St Andrews

Understanding of CO2 electrochemical reduction reaction process via high temperature solid oxide electrolysers

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Abstract

The CO2 electrochemical reduction via SOEC was studied for a range of cathode materials in various operational conditions. The influences of the fuel gas composition, operating potential and temperature on cathode behavior are discussed and compared on different cathodes. The dissociative adsorption and surface diffusion of active species from CO2 reduction reaction was found to contribute dominantly to the LSCM-based cathode working in CO2-CO mixtures. Efforts were also made to obtain a high performance and durable cathode for high temperature CO2 electrolyser by employing a gradient LSCM-YSZ cathode and by adopting wet impregnation in cathode preparation. The latter was to more effective in enhancing the cathode electro-catalytic activity. A competitive cathode to Ni-YSZ cermet was fabricated by infiltrating 0.5wt% Pd and GDC into porous LSCM and YSZ layers.

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Original languageEnglish
Title of host publication14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015
EditorsK. Eguchi, S. C. Singhal
PublisherElectrochemical Society
Pages3535-3551
Number of pages17
ISBN (Print)9781607685395
DOIs
Publication statusPublished - 17 Jul 2015
EventECS Conference on Electrochemical Energy Conversion & Storage with SOFC-XIV - Glasgow, United Kingdom
Duration: 26 Jul 201531 Jul 2015

Publication series

NameECS Transactions
PublisherElectrochemical Society
Number1
Volume68
ISSN (Print)1938-5862

Conference

ConferenceECS Conference on Electrochemical Energy Conversion & Storage with SOFC-XIV
CountryUnited Kingdom
CityGlasgow
Period26/07/1531/07/15

    Research areas

  • Catalyst activity, Cathodes, Cermets, Electrodes, Electrolytic reduction, Fuel storage, Metal drawing, Reduction, Regenerative fuel cells, Yttria stabilized zirconia

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