文献类型：期刊文献

英文题名：High-entropy perovskite oxides for direct solar-driven thermochemical CO2 splitting

作者：Wang, Qi[1];Xuan, Yimin[1];Gao, Ke[1];Sun, Chen[1];Gao, Yunfei[2];Liu, Jingrui[1];Chang, Sheng[1];Liu, Xianglei[1]

机构：[1]Nanjing Univ Aeronaut & Astronaut, Sch Energy & Power Engn, Nanjing 210016, Peoples R China;[2]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China

年份：2024

卷号：50

期号：1

起止页码：1564

外文期刊名：CERAMICS INTERNATIONAL

收录：;EI(收录号：20234414997990);WOS:【SCI-EXPANDED(收录号:WOS:001130376400001)】；

基金：This work is financially supported by the National Natural Science Foundation of China (No. 51888103 and 52076106) and the Basic Research Program of Frontier Leading Technologies in Jiangsu Province (BK20202008) .

语种：英文

外文关键词：Perovskites; Thermochemical cycle; Solar fuels; CO2 splitting

摘要：The global energy crisis and climate change have fueled interest in solar-driven thermochemical CO2 splitting as a potential solution. However, conventional materials like CeO2 encounter limitations attributable to their low solar absorptivity and CO yield (even at high reduction temperatures), exerting a detrimental influence on both solar energy utilization and process efficiency. This study proposes high-entropy A-site doped perovskites as a potential solution for efficient solar thermochemical CO2 splitting. The increased configurational entropy enhances the solar thermal CO2 splitting cycles by decreasing oxygen vacancy formation energy and lattice oxygen migration energy barrier. This is supported by experimental results, where Sm0.25Sr0.25Ca0.25La0.25MnO3 achieved a maximum CO yield of 764.76 mu mol g_ 1 with low temperature difference between the reduction and oxidation steps, marking an important progress in solar thermal CO2 splitting cycles. The study demonstrates the potential of high-entropy perovskites for direct solar energy harvesting with high spectrum absorption coefficients and sustainable CO2 utilization.