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- W3081615191 abstract "Developing highly active, cost-effective, and environmental friendly oxygen evolution reaction (OER) electrocatalysts facilitates various (photo)electrochemical processes. In this work, Fe3N nanoparticles encapsulated into N-doped graphene nanoshells (Fe3[email protected]) as OER electrocatalysts in alkaline media were reported. Both the experimental and theoretical comparison between Fe3[email protected] and Fe3N/NG, specifically including in situ Mössbauer analyses, demonstrated that the NG nanoshells improved interfacial electron transfer process from Fe3N to NG to form high-valence Fe4+ ions (Fe4+@NG), thus modifying electronic properties of the outer NG shells and subsequently electron transfer from oxygen intermediate to NG nanoshells for OER catalytic process. Meanwhile, the NG nanoshells also protected Fe-based cores from forming OER inactive and insulated Fe2O3, leading to high OER stability. As a result, the as-formed Fe4+@NG shows one of the highest electrocatalytic efficiency among reported Fe-based OER electrocatalysts, which can as well highly improve the photoelectrochemical water oxidation when used as the co-catalysts for the Fe2O3 nanoarray photoanode." @default.
- W3081615191 created "2020-09-08" @default.
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- W3081615191 date "2021-03-01" @default.
- W3081615191 modified "2023-10-14" @default.
- W3081615191 title "Surpassing electrocatalytic limit of earth-abundant Fe4+ embedded in N-doped graphene for (photo)electrocatalytic water oxidation" @default.
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- W3081615191 doi "https://doi.org/10.1016/j.jechem.2020.05.053" @default.
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