Co nanoparticles decorated with in-situ exsolved oxygen-storage CeO2 for an efficient and stable electrolysis of pure CO2
Date
01/10/2023Metadata
Show full item recordAbstract
The valorization of the CO2 greenhouse gas is important in decarbonization using the renewable energies. Intermediate temperature solid oxide electrolysis cells (SOEC) working at around 800 °C can be useful in activating the strong C=O bond (799 kJ mol−1) in CO2 for the production of CO and decreasing the precious electricity by partially using the heat instead. Ceria/Co doping on the stable chromite is employed to design a composite oxide/metal cathode with a unique ceria decorating Co0 for the direct CO2 electrolysis. The in situ outgrowth of Co0 from the B site activates the ceria exsolution from the A site, or vice versa, producing a well-adhered heterojunction for the activation of CO2. A high current and stable density above 1 Acm−2 for 300 h is obtained at a bias of 1.3 V for the CO2 at a Faraday efficiency close to unity. The higher electrochemical performance of the cell with Ce/Co0 codoped cathode is explained by the oxygen storage property of the ceria rather than the direct activation of CO2 over ceria. This work presents a novel method of constructing metal/oxide cathode for efficient CO2 analysis and in-depth mechanistic explanation for the metal/oxide hetero-structure in CO2 activation.
Citation
Lu , L , He , D , Fang , R , Ni , C & Irvine , J T S 2023 , ' Co nanoparticles decorated with in-situ exsolved oxygen-storage CeO 2 for an efficient and stable electrolysis of pure CO 2 ' , Journal of Power Sources , vol. 580 , 233424 . https://doi.org/10.1016/j.jpowsour.2023.233424
Publication
Journal of Power Sources
Status
Peer reviewed
ISSN
0378-7753Type
Journal article
Description
Funding: This work was supported by the Science and Technology Research Program of Chongqing Municipal Education Commission (Grant No. KJQN201900843) and Chongqing Technology and Business University Scientific Research Fund (1956017). NSFC (grant No. 51702264) and research founding from central universities (SWURC2020002) and Chongqing Science and Technology Committee (cstc2021ycjh-bgzxm0162) are also acknowledged.Collections
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