Tuning the Electronic Properties of Platinum in Hybrid-Nanoparticle Assemblies for use in Hydrogen Evolution Reaction |
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| Authors: | Ling Yang Roland Grzeschik Ping Jiang Linfeng Yu Cejun Hu Aoxuan Du Sebastian Schlücker Wei Xie |
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| Affiliation: | 1. Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071 China;2. Department of Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstrasse 5, 45141 Essen, Germany;3. College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108 China |
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| Abstract: | Platinum is the best electrocatalyst for the hydrogen evolution reaction (HER). Here, we demonstrate that by contact electrification of Pt nanoparticle satellites on a gold or silver core, the Fermi level of Pt can be tuned. The electronic properties of Pt in such hybrid nanocatalysts were experimentally characterized by X-ray photoelectron spectroscopy (XPS) and surface-enhanced Raman scattering (SERS) with the probe molecule 2,6-dimethyl phenyl isocyanide (2,6-DMPI). Our experimental findings are corroborated by a hybridization model and density functional theory (DFT) calculations. Finally, we demonstrate that tuning of the Fermi level of Pt results in reduced or increased overpotentials in water splitting. |
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| Keywords: | Contact Electrification Electron Transfer Fermi Level HER Hybrid-Nanoparticles Assemblies |
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