Pd and GDC Co-infiltrated LSCM cathode for high-temperature CO2 electrolysis using solid oxide electrolysis cells
Abstract
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.
Citation
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
Publication
Chemical Engineering Journal
Status
Peer reviewed
ISSN
1385-8947Type
Journal article
Description
This 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.Collections
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.