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- W4362452783 abstract "Molybdenum carbides are the most promising noble metal-free electrocatalyst for hydrogen evolution reaction (HER). However, the investigation of phase-dependent intermediate adsorption on phase evolution engineering of molybdenum carbides is still insufficient. Herein, we developed a phase evolution carbonization procedure for synthetic molybdenum carbides with tunable phases for efficient hydrogen production, whose hydrogen intermediate adsorption energies can be regulated. Among them, Mo2C/MoC-1 shows a lowest overpotential of 128 mV, 162 mV and 119 mV in acidic, neutral and alkaline environment, respectively, steady operating at 10 mA cm−2 for 100 h. Tunable phase composites of molybdenum carbide composites induce favorable electronic structure and a local nucleophilic/electrophilic region at the interface of α-MoC and β-Mo2C phases, which promotes their HER performance. Density functional theory (DFT) calculations further reveal that Mo2C/MoC-1 conveys a Hads adsorption free energy (ΔGH*) of −0.17 eV in acid and a low water dissociation energy barrier of 1.12 eV in alkaline and neutral environment, pledging admirable HER performance in pH-universal conditions. This work provides a guidance to modulate the phase of molybdenum carbides for hydrogen evolution." @default.
- W4362452783 created "2023-04-05" @default.
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- W4362452783 date "2023-07-01" @default.
- W4362452783 modified "2023-10-16" @default.
- W4362452783 title "Phase-dependent intermediate adsorption regulation on molybdenum carbides for efficient pH-universal hydrogen evolution" @default.
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- W4362452783 doi "https://doi.org/10.1016/j.apsusc.2023.157169" @default.
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