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- W3084248734 abstract "• Manganese oxide nano-catalysts are fabricated by γ-radiation induced method. • Morphology and composition of MnOx are tuned by the synthesis conditions. • Oxygen reduction reaction (ORR) activity of the obtained material is studied. • Hollow spherical γ-MnO 2 particles exhibit a 4-electron transfer pathway. • Mn 3 O 4 (with composition 2MnO-MnO 2 ) nanorods favour an incomplete 2-electron pathway. A γ-radiation induced synthesis method is used to fabricate manganese oxide catalysts through both reduction and oxidation routes. It is shown that the morphology, composition and electrochemical performance of the produced manganese oxide particles can be tuned by altering the redox conditions. The catalysts prepared via radiolytic oxidation have a hollow spherical morphology, possess γ-MnO 2 structure and show high catalytic activity for the complete four-electron reaction pathway of the oxygen reduction reaction (ORR) in alkaline electrolyte. Meanwhile, the catalysts synthesized via radiolytic reduction possess a rod-like morphology with a Mn 3 O 4 bulk structure and favour the incomplete two-electron reaction pathway for ORR. The high catalytic activity of the manganese oxide synthesized via the oxidation route can be attributed to high electrochemical surface area and increased amount of Mn 3+ on the surface as compared to those in the sample obtained via the reduction route." @default.
- W3084248734 created "2020-09-14" @default.
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- W3084248734 date "2021-02-01" @default.
- W3084248734 modified "2023-10-01" @default.
- W3084248734 title "Tuning morphology, composition and oxygen reduction reaction (ORR) catalytic performance of manganese oxide particles fabricated by γ-radiation induced synthesis" @default.
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- W3084248734 doi "https://doi.org/10.1016/j.jcis.2020.09.011" @default.
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