4.5 Article

WO3/C nanoarchitectures assembled with 1D nanowires: The synthesis, Pt nanoparticles decoration, and highly enhanced hydrogen evolution in neutral media

期刊

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2021.110542

关键词

WO3; Pt; Microstructure; Hydrogen evolution reaction; Density functional theory

资金

  1. National Natural Science Foundation of China, China [NSFC: 52002359]
  2. Zhengzhou University of Light Industry [2020ZCKJ203, 2018BSJJ027]

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This study successfully prepared a novel efficient WO3-based hydrogen evolution reaction catalyst, which exhibited outstanding performance in neutral media and showed higher activity compared to commercial Pt/C.
Electrochemical water splitting is an efficient approach to produce green hydrogen, while it is still very challenging to design of highly efficient WO3-based hydrogen evolution reaction (HER) catalysts especially those in neutral media. Here, 3D WO3/C nanoarchitectures assembled by 1D nanowires were prepared through water-oil two-phase microemulsion method and subsequent annealing treatment. The monodispersed Pt nanoparticles were loaded onto the WO3/C nanoarchitectures. A series of WO3/C composites were produced via modulating the addition of Pt salt. The optimum 2 Pt@WO3/C catalyst exhibited an overpotential of 149 mV at 10 mA cm(-2) in neutral media, which was the first reported about the WO3-based materials and much better than most catalysts reported in literatures by far. Interestingly, the HER activity of 2 Pt@WO3/C was much higher than commercial Pt/C at high overpotential range (>260 mV). Density functional theory results demonstrated that the more toilless HER process could be attributed to the enhanced carrier densities, the electron transfer between Pt and W atoms, and the lowered energy barrier for water dissociation and H* desorption.

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