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- W2998455117 abstract "Abstract Recently, many works have demonstrated that tuning the A-site deficient and excessive stoichiometry can yield the positive effects on the catalytic activity of the ABO3 perovskite toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Whereas, the universality of the deficient or excessive effects and their resulting improving mechanisms on ABO3 perovskite are still ambiguous and need to be clarified. In this work, the simplest Mn-based perovskite (LaMnO3) is selected to elucidate the deficient/excessive effects and improving mechanisms on both ORR and OER. We find that A-site deficient stoichiometry is favor to the catalytic activity and stability of LaMnO3 toward both ORR and OER, whereas A-site excessive stoichiometry is deleterious to the oxygen catalytic activity and stability of LaMnO3. The high oxygen catalytic activity of La0·9MnO3 (La90) with A-site deficiency toward ORR and OER can be related to its proper Mn cation valence, large amount of oxygen vacancies, upper shift of d-band center and strong adsorption capacity to oxygenated species. The results of this work highlight the A-site deficient Mn-based perovskite as the high efficient and commercially viable bifunctional catalyst for aqueous and solid-state flexible zinc-air battery (ZAB) applications." @default.
- W2998455117 created "2020-01-10" @default.
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- W2998455117 date "2020-02-01" @default.
- W2998455117 modified "2023-10-01" @default.
- W2998455117 title "A-site deficient/excessive effects of LaMnO3 perovskite as bifunctional oxygen catalyst for zinc-air batteries" @default.
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- W2998455117 doi "https://doi.org/10.1016/j.electacta.2019.135566" @default.
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