Enhanced Thermochemical H_2 Production on Ca-Doped Lanthanum Manganite Perovskites Through Optimizing the Dopant Level and Re-oxidation Temperature |
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| Authors: | Lulu Wang Mohammad Al-Mamun Porun Liu Yu Lin Zhong Yun Wang Hua Gui Yang Huijun Zhao |
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| Affiliation: | 1. Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University, Southport, QLD 4222, Australia;2. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology,Shanghai 200237, China;3. Centre for Environmental and Energy Nanomaterials,Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China |
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| Abstract: | 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-xCa x MnO3 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, La0.6Ca0.4MnO3 perovskite displayed the highest yield of H2 at the re-oxidation temperature of 900 °C 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. |
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| Keywords: | Thermochemical water splitting Hydrogen production Perovskite oxides Dopant level Re-oxidation temperature |
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