Application of Li-, Mg-, Ba-, Sr-, Ca-, and Sn-doped ceria for solar-driven thermochemical conversion of carbon dioxide

The redox reactivity of the Li-, Mg-, Ca-, Sr-, Ba-, and Sn-doped ceria (Ce_0.9A0.₁O₂−_δ) toward thermochemical CO₂ splitting is investigated. Proposed Ce_0.9A0.₁O₂−_δ materials are prepared via co-precipitation of the hydroxide technique. The composition, morphology, and the average particle size of the Ce_0.9A0.₁O₂−_δ materials are determined by using suitable characterization methods. By utilizing a thermogravimetric analyzer setup, the long-term redox performance of each Ce_0.9A0.₁O₂−_δ material is estimated. The results obtained indicate that all the Ce_0.9A0.₁O₂−_δ materials are able to produce steady amounts of O₂ and CO from cycle 4 to cycle 10. Based on the average n_O2 released and n_CO produced, the Ce_0.899Sn_0.102O2.002 and Ce_{0.895Ca0.099O1.889} are observed to be the top and bottom-most choices. When compared with the CeO₂ material, all Ce_0.9A0.₁O₂−_δmaterials showed elevated levels of O₂ release and CO production.

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Published in: Journal of Materials Science
License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s10853-020-04875-1