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- W4254454443 abstract "<p>Recent studies show the limitations of catalytic activity descriptor-based approaches to rationalize the kinetics of the hydrogen oxidation and evolution reactions (HOR/HER). Herein, we deposited several transition metals (TMs) onto Pt surfaces to disturb and probe the interface in alkaline solutions. The redox transition of these TMs in association with adsorption and desorption of reaction intermediates during the HOR/HER was monitored via <i>in situ</i> X-ray absorption spectroscopy. We propose that the TM facilitates the HOR by anchoring H<sub>2</sub>O with the H-up configuration (↑H<sub>2</sub>O<sub>ad</sub>) that removes H<sub>ad</sub> on Pt via the bifunctional mechanism, based on the first in situ experimental evidence for the presence of ↑H<sub>2</sub>O<sub>ad</sub> on surface Ru. Meanwhile, the TM promotes the HER of Pt by anchoring OH<sub>ad</sub> to trigger the hard–soft acid–base (HSAB) mechanism for OH<sub>ad</sub> removal. The revised 2B theory depicts a coherent picture of the HOR/HER kinetics in aqueous solutions.<br></p>" @default.
- W4254454443 created "2022-05-12" @default.
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- W4254454443 date "2019-09-27" @default.
- W4254454443 modified "2023-10-16" @default.
- W4254454443 title "A Coherent Picture of the Hydrogen Oxidation and Evolution Reactions in Aqueous Solutions" @default.
- W4254454443 doi "https://doi.org/10.26434/chemrxiv.9904781" @default.
- W4254454443 hasPublicationYear "2019" @default.
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