Understanding of CO2 electrochemical reduction reaction process via high temperature solid oxide electrolysers
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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.
Yue , X & Irvine , J T S 2015 , Understanding of CO 2 electrochemical reduction reaction process via high temperature solid oxide electrolysers . in K Eguchi & S C Singhal (eds) , 14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015 . ECS Transactions , no. 1 , vol. 68 , Electrochemical Society , pp. 3535-3551 , ECS Conference on Electrochemical Energy Conversion & Storage with SOFC-XIV , Glasgow , United Kingdom , 26-31 July . DOI: 10.1149/06801.3535ecstconference
14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015
© The Electrochemical Society, Inc. 2015. 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 here https://dx.doi.org/10.1149/06801.3535ecst
The authors thank the University of St Andrews and RCUK Energy Supergen programme on H-Delivery and EPSRC Platform and Senior fellowship programs for funding.
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