• Title/Summary/Keyword: Catalysts infiltration

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

  • Jeong, Hyeon-Ye;Yoon, Kyung Joong;Lee, Jong-Ho;Chung, Yong-Chae;Hong, Jongsup
    • Journal of the Korean Ceramic Society
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    • v.55 no.1
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    • pp.50-54
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    • 2018
  • 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.