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http://dx.doi.org/10.4191/kcers.2018.55.1.09

Long-Term Stability for Co-Electrolysis of CO2/Steam Assisted by Catalyst-Infiltrated Solid Oxide Cells  

Jeong, Hyeon-Ye (High Temperature Energy Materials Research Center, Korea Institute of Science and Technology)
Yoon, Kyung Joong (High Temperature Energy Materials Research Center, Korea Institute of Science and Technology)
Lee, Jong-Ho (High Temperature Energy Materials Research Center, Korea Institute of Science and Technology)
Chung, Yong-Chae (Division of Materials Science and Engineering, Hanyang University)
Hong, Jongsup (Department of Mechanical Engineering, Yonsei University)
Publication Information
Journal of the Korean Ceramic Society / v.55, no.1, 2018 , pp. 50-54 More about this Journal
Abstract
This study investigated the long-term durability of catalyst(Pd or Fe)-infiltrated solid oxide cells for $CO_2$/steam co-electrolysis. Fuel-electrode supported solid oxide cells with dimensions of $5{\times}5cm^2$ were fabricated, and palladium or iron was subsequently introduced via wet infiltration (as a form of PdO or FeO solution). The metallic catalysts were employed in the fuel-electrode to promote $CO_2$ reduction via reverse water gas shift reactions. The metal-precursor particles were well-dispersed on the fuel-electrode substrate, which formed a bimetallic alloy with Ni embedded on the substrate during high-temperature reduction processes. These planar cells were tested using a mixture of $H_2O$ and $CO_2$ to measure the electrochemical and gas-production stabilities during 350 h of co-electrolysis operations. The results confirmed that compared to the Fe-infiltrated cell, the Pd-infiltrated cell had higher stabilities for both electrochemical reactions and gas-production given its resistance to carbon deposition.
Keywords
Solid oxide cells; Catalysts infiltration; Co-electrolysis; $CO_2$ conversion; Long-term stability;
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