Journal
INORGANIC CHEMISTRY FRONTIERS
Volume 7, Issue 9, Pages 1892-1899Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0qi00124d
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Funding
- Key Research and Development Program of China [2019YFA0705700]
- National Natural Science Foundation of China [51973244, 21902188]
- China Postdoctoral Science Foundation [2018M640847, 2019T120764]
- Fundamental Research Funds for the Central Universities [19lgpy15]
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Electrocatalytic reduction of water is a promising route to produce hydrogen under mild conditions. High-index facet control is one of the most promising ways to achieve excellent catalytic activity for the hydrogen evolution reaction (HER). However, the mechanism of the high-index facet enhancement remains unclear. Here, we combine in situ Raman spectroscopy and theoretical calculations to elucidate the mechanism of HER catalytic performance enhanced by high-index facets on Ti@TiO2 nanosheets. During the HER process, water molecules tend to adsorb to the high-index facet surface and then reduce to hydrogen. Our work lays the foundation for future exploration of the mechanism of electrocatalysis in transition-metal-based electrocatalysts by in situ Raman spectroscopy for applications in energy and environment-related issues.
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