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Enhanced Thermochemical Water Splitting through Formation of Oxygen Vacancy in La 0.6 Sr 0.4 BO 3− δ (B=Cr, Mn, Fe, Co, and Ni) Perovskites
Author(s) -
Wang Lulu,
AlMamun Mohammad,
Zhong Yu Lin,
Liu Porun,
Wang Yun,
Yang Hua Gui,
Zhao Huijun
Publication year - 2018
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201800178
Subject(s) - thermogravimetric analysis , perovskite (structure) , oxygen , water splitting , vacancy defect , redox , spectroscopy , materials science , catalysis , oxygen evolution , chemistry , crystallography , inorganic chemistry , analytical chemistry (journal) , physics , electrochemistry , biochemistry , organic chemistry , photocatalysis , quantum mechanics , chromatography , electrode
Oxygen vacancies in catalyst systems play a crucial role in manipulating pivotal redox properties that are strongly dependent on the composition of the material. Herein, for the first time, experimental evidence of a linear correlation between the extent of oxygen vacancy formation in the La 0.6 Sr 0.4 BO 3 (B=Cr, Mn, Fe, Co, and Ni) perovskite series and H 2 generation in two‐step thermochemical water splitting is reported, with detailed materials characterization by means of thermogravimetric analysis, XRD, SEM, TEM, and energy‐dispersive X‐ray spectroscopy. Noteworthy O 2 (718 μmol g −1 ) and H 2 (514 μmol g −1 ) production was achieved by the La 0.6 Sr 0.4 CoO 3 perovskite in the thermochemical water‐splitting process conducted between 1300 and 900 °C.
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