Two-Step Thermochemical CO2 Splitting Using Partially-Substituted Perovskite Oxides of La0.7Sr0.3Mn0.9X0.1O3 for Solar Fuel Production
Two-Step Thermochemical CO2 Splitting Using Partially-Substituted Perovskite Oxides of La0.7Sr0.3Mn0.9X0.1O3 for Solar Fuel Production
复制标题
DOI：
10.3389/fenrg.2022.872959
复制
发表时间：
2022-05
期刊：
影响因子：
--
通讯作者：
Hiroki Sawaguri;N. Gokon;Kosuke Hayashi;Yoshikazu Iwamura;Daichi Yasuhara
中科院分区：
文献类型：
--
作者：
Hiroki Sawaguri;N. Gokon;Kosuke Hayashi;Yoshikazu Iwamura;Daichi Yasuhara
本文研究了La0.7Sr0.3Mn0.9X0.1O_3系列La0.7Sr0.3Mn0.9X0.1O_3系列钙钛矿氧化物中B位部分取代的氧化还原活性，以太阳集中辐射为能源制备太阳能两步热化学燃料。我们系统地研究了部分取代对LaSrMnO_3的动力学行为、氧/CO产率、热还原/氧化温度的影响。此外，对使用相同程序制备的样品和使用相同测试方法进行研究的样品之间的重复性进行了评估和比较。我们观察和评价了两步热化学CO2裂解中钙钛矿的氧化还原活性和组成离子物种的价态变化的长期热稳定性。从优异的活性和长期重复性的角度来看，镍、钴和镁取代的LSM钙钛矿是一种很有前途的热化学两步法CO2/H2O裂解制取合成气的催化剂。
We investigated, herein, the redox activity of partial substitution of the B-site in a series of lanthanum/strontium-manganese-based (LSM) perovskite oxide, La0.7Sr0.3Mn0.9X0.1O3 for solar two-step thermochemical fuel production using concentrated solar radiation as an energy source. We systematically investigated the effects of partial substitution in LaSrMnO3 in terms of their kinetics behavior, oxygen/CO productivity, thermal reduction/oxidation temperatures. Furthermore, repeatability was evaluated and compared among the samples prepared using the same procedure and studied using the same test method. We observed and evaluated the long-term thermal stability of the redox activity and valence variation of the constituting ionic species of the perovskite in the two-step thermochemical CO2 splitting. From the perspectives of superior activity and long-term repeatability, Ni-, Co-, and Mg-substituted LSM perovskites are promising for thermochemical two-step CO2/H2O splitting to produce synthetic gas.