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- W4386759883 abstract "Maximizing the oxygen evolution reaction (OER) catalytic activity of carbon coated core-shell electrocatalysts is significant for the application of water electrolyzers and rechargeable metal-air batteries, yet the modulation of the catalytic properties through interfaces coupling remains challenging. Here, we construct Fe5C2 phase interlayered between carbon shell and Co8FeS8 core (Co8FeS8-Fe5C2@C) for enhancing the alkaline OER catalytic performance. By altering the interlayer phase with Co1-xS as the control sample (Co8FeS8-Co1-xS@C), synchrotron X-ray absorption spectroscopy analysis integrated with density functional theory calculations indicate that the induced interfacial electron coupling of Co8FeS8-Co1-xS and Co8FeS8-Fe5C2 can upshift the d-band center toward Fermi level, optimalize Gibbs free energy for oxygen-containing intermediates, facilitate electron transfer between Co8FeS8 and carbon shell. Consequently, the target Co8FeS8-Fe5C2@C catalyst with stronger interface coupling and optimal electron modulation shows an significant overpotential (η10) decrease by 93 mV compared with Co8FeS8@C, along with a Tafel slop of 48.9 mV dec-1 and a long catalytic lifetime, outperforming commercial RuO2 and other reported analogous catalysts. This work opens up further opportunities of interlayer modification in carbon caoted core-shell catalyst to effictivly tailor the d-Band centers for effectively strengthen its catalytic performance." @default.
- W4386759883 created "2023-09-16" @default.
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- W4386759883 date "2024-02-01" @default.
- W4386759883 modified "2023-09-30" @default.
- W4386759883 title "2Interfaces Coupling of Co8FeS8-Fe5C2 with Elevated d-Band Center for Efficient Water Oxidation Catalysis" @default.
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- W4386759883 doi "https://doi.org/10.1016/j.apcatb.2023.123294" @default.
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