Enhanced Thermochemical H2 Production on Ca-Doped Lanthanum Manganite Perovskites Through Optimizing

• 作 者: Lulu Wang Mohammad Al-Mamun Porun Liu Yu Lin Zhong Yun Wang Hua Gui Yang Huijun Zhao
• 机 构: Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University, Southport, QLD 4222
• 出 处: 金属学报（英文版）
• 发表日期: 2018年4期
• 关键词: Thermochemical water splitting Hydrogen production Perovskite oxides Dopant leve

Perovskite material is one of the promising classes of redox catalysts for hydrogen production through two-step thermochemical H2O 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 comprehensively 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,La0.6Ca0.4MnO3 perovskite catalyst exhibited impressive cyclic stability in repetitive O2 and H2 test.