Journal
NATURE COMMUNICATIONS
Volume 13, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-022-33007-3
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Funding
- National Key R&D Program of China [2021YFB3801600]
- National Natural Science Foundation of China [21872121, 21908189]
- Fundamental Research Funds for the Central Universities [2017XZZX002-16]
- Ministry of Education of Singapore [Tier 1: RG4/20, Tier 2: MOET2EP10120-0002]
- Agency for Science, Technology and Research [AME IRG: A20E5c0080]
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In this study, the integration of Ru nanoparticles on oxygen-deficient WO3-x was found to greatly enhance the activity of hydrogen evolution reaction. Oxygen-deficient WO3-x has a large capacity for storing protons, which increases the hydrogen coverage on the surface of Ru nanoparticles.
Noble metal electrocatalysts (e.g., Pt, Ru, etc.) suffer from sluggish kinetics of water dissociation for the electrochemical reduction of water to molecular hydrogen in alkaline and neutral pH environments. Herein, we found that an integration of Ru nanoparticles (NPs) on oxygen-deficient WO3-x manifested a 24.0-fold increase in hydrogen evolution reaction (HER) activity compared with commercial Ru/C electrocatalyst in neutral electrolyte. Oxygen-deficient WO3-x is shown to possess large capacity for storing protons, which could be transferred to the Ru NPs under cathodic potential. This significantly increases the hydrogen coverage on the surface of Ru NPs in HER and thus changes the rate-determining step of HER on Ru from water dissociation to hydrogen recombination.
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