Pd and GDC Co-infiltrated LSCM cathode for high-temperature CO2 electrolysis using solid oxide electrolysis cells
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The electrochemical reduction of CO2 using a highly efficient solid oxide electrolyzer could be considered an alternative to the advanced utilization of CO2. The La(Sr)Cr(Mn)O3 (LSCM) perovskite oxide has previously been examined as a promising ceramic cathode material for application in a CO2 solid oxide electrolyzer at high temperatures. However, LSCM suffers from low electrocatalytic activity towards CO2 reduction. In this study, a modified LSCM-based cathode material is fabricated by co-infiltrating Pd metal and Ce0.8Gd0.2O1.9 (GDC) nanoparticles on the surface of the LSCM scaffold. Structural characterization and electrochemical analysis of the high-temperature CO2 electrolysis procedure are conducted for various CO/CO2 mixtures and at different operating temperatures. The enhanced electrocatalytic activity of the Pd-GDC co-infiltrated LSCM cathode compared to LSCM is attributed to the increased numbers of active triple phase boundaries and surface oxygen vacancies resulting from the co-infiltration of Pd-GDC nanoparticles on the LSCM cathode.
Lee , S , Woo , S H , Shin , T H & Irvine , J T S 2020 , ' Pd and GDC Co-infiltrated LSCM cathode for high-temperature CO 2 electrolysis using solid oxide electrolysis cells ' , Chemical Engineering Journal , vol. In press , 127706 . https://doi.org/10.1016/j.cej.2020.127706
Chemical Engineering Journal
Copyright © 2020 Published by Elsevier B.V. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.cej.2020.127706
DescriptionThis work was supported by the Technology Innovation Program (grant no. 20182010600400) funded by the Ministry or Trade, Industry & Energy (MI, Korea). Support was also provided by the Technology Innovation Program (Grant Nos. 20004963) funded by Ministry of Trade, Industry and Energy (MOTIE) of Korea. We also thank Korea Institute of Ceramic Engineering and Technology (KICET) internal program (KPP20003) for support.
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