Interfacial electronic structure engineering on molybdenum sulfide for robust dual-pH hydrogen evolution
نویسندگان
چکیده
Abstract Molybdenum disulfide, as an electronic highly-adjustable catalysts material, tuning its structure is crucial to enhance intrinsic hydrogen evolution reaction (HER) activity. Nevertheless, there are yet huge challenges the understanding and regulation of surface molybdenum disulfide-based catalysts. Here we address these by phase modulation synergistic with interfacial chemistry defects from phosphorus or sulfur implantation, then successfully design synthesize electrocatalysts multi-heterojunction interfaces (e.g., 1T 0.81 -MoS 2 @Ni P), demonstrating superior HER activities good stabilities a small overpotentials 38.9 95 mV at 10 mA/cm , low Tafel slopes 41 42 mV/dec in acidic well alkaline surroundings, outperforming commercial Pt/C catalyst other reported Mo-based Theoretical calculation verified that incorporation metallic-phase HER-active Ni-based materials into disulfide could effectively regulate for making bandgap narrower. Additionally, X-ray absorption spectroscopy indicate reduced nickel possesses empty orbitals, which helpful additional H binding ability. All factors can decrease Mo-H bond strength, greatly improving catalytic activity materials.
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ژورنال
عنوان ژورنال: Nature Communications
سال: 2021
ISSN: ['2041-1723']
DOI: https://doi.org/10.1038/s41467-021-25647-8