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  • Ca2+ and Ga3+ doped LaMnO3 perovskite as a highly efficient and stable catalyst for two-step thermochemical water splitting

    Author(s)
    Wang, Lulu
    Al-Mamun, Mohammad
    Zhong, Yu Lin
    Jiang, Lixue
    Liu, Porun
    Wang, Yun
    Yang, Hua Gui
    Zhao, Huijun
    Griffith University Author(s)
    Zhao, Huijun
    Liu, Porun
    Wang, Yun
    Zhong, Yulin
    Year published
    2017
    Metadata
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    Abstract
    High performance and stable catalysts for two-step thermochemical water splitting are key to synthesising direct fuels in the form of H2 or liquid hydrocarbon fuels by the Fischer–Tropsch process. Herein, we designed and synthesised LaMnO3 perovskite structured oxides doped on both the A and B sites for two-step thermochemical water splitting. First, Ca2+, Sr2+ and Ba2+ divalent cations were successfully doped on the A site of LaMnO3 and the thermochemical water splitting performances were analysed. After that, Al3+ and Ga3+ ions were doped on the B site of the perovskites produced in the first step. Through this strategy, ...
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    High performance and stable catalysts for two-step thermochemical water splitting are key to synthesising direct fuels in the form of H2 or liquid hydrocarbon fuels by the Fischer–Tropsch process. Herein, we designed and synthesised LaMnO3 perovskite structured oxides doped on both the A and B sites for two-step thermochemical water splitting. First, Ca2+, Sr2+ and Ba2+ divalent cations were successfully doped on the A site of LaMnO3 and the thermochemical water splitting performances were analysed. After that, Al3+ and Ga3+ ions were doped on the B site of the perovskites produced in the first step. Through this strategy, a novel perovskite composition (La0.6Ca0.4Mn0.8Ga0.2O3) was found with remarkable water splitting performance, producing 401 μmol g−1 of H2 at low thermochemical cycle temperatures between 1300 and 900 °C. The as-prepared perovskite exhibits twelve times higher H2 production than the benchmark CeO2 catalyst under the same experimental conditions. This novel perovskite is also capable of maintaining steady-state redox activity during the water splitting cycles.
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    Journal Title
    Sustainable Energy & Fuels
    Volume
    2017
    Issue
    1
    DOI
    https://doi.org/10.1039/c6se00097e
    Subject
    Solid state chemistry
    Macromolecular materials
    Physical chemistry
    Chemical engineering
    Electrical engineering
    Publication URI
    http://hdl.handle.net/10072/356046
    Collection
    • Journal articles

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