Enhanced Thermochemical H_2 Production on Ca-Doped Lanthanum Manganite Perovskites Through Optimizing the Dopant Level and Re-oxidation Temperature  

作　　者：Lulu Wang Mohammad Al-Mamun Porun Liu Yu Lin Zhong Yun Wang Hua Gui Yang Huijun Zhao 

机构地区：[1]Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University [2]Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering,East China University of Science and Technology [3]Centre for Environmental and Energy Nanomaterials,Institute of Solid State Physics, Chinese Academy of Sciences

出　　处：《Acta Metallurgica Sinica(English Letters)》2018年第4期431-439,共9页金属学报（英文版）

基　　金：financially supported by Australian Research Council(ARC);the National Natural Science Foundation of China(Grant Nos.51372248 and 51432009)

摘　　要：Perovskite material is one of the promising classes of redox catalysts for hydrogen production through two-step ther-mochemical H20 splitting.Herein,an analogue of La1-xCaxMnO3 perovskite was systematically investigated as a catalyst for thermochemical H2 evolution.The Ca doping level（x = 0.2,0.4,0.6,0.8）and re-oxidation temperature were com-prehensively optimized for the improvement of catalytic performance.According to our experimental results,La0.6-Ca0.4MnO3 perovskite displayed the highest yield of H2 at the re-oxidation temperature of 900℃ and the obtained H2 production was -10 times higher than that of the benchmark ceria catalyst under the same experimental condition.More importantly,Lao.6Ca0.4MnO3 perovskite catalyst exhibited impressive cyclic stability in repetitive O2 and H2 test.Perovskite material is one of the promising classes of redox catalysts for hydrogen production through two-step ther-mochemical H20 splitting.Herein,an analogue of La1-xCaxMnO3 perovskite was systematically investigated as a catalyst for thermochemical H2 evolution.The Ca doping level（x = 0.2,0.4,0.6,0.8）and re-oxidation temperature were com-prehensively optimized for the improvement of catalytic performance.According to our experimental results,La0.6-Ca0.4MnO3 perovskite displayed the highest yield of H2 at the re-oxidation temperature of 900℃ and the obtained H2 production was -10 times higher than that of the benchmark ceria catalyst under the same experimental condition.More importantly,Lao.6Ca0.4MnO3 perovskite catalyst exhibited impressive cyclic stability in repetitive O2 and H2 test.

关 键 词：Thermochemical water splitting Hydrogen production Perovskite oxides Dopant level Re-oxidationtemperature 

分 类 号：O643.36[理学—物理化学] TQ116.2[理学—化学]