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Three-Dimensional Nanoporous Tungsten Disulfide/Acetylene Black Nanoflower Composite as Efficient Electrocatalyst for Enhanced Hydrogen Evolution Reaction

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A novel three-dimensional nanoporous tungsten disulfide/acetylene black (nanoporous-WS2/AB) electrocatalyst was successfully prepared by template assisted hydrothermal method and further applied to hydrogen evolution reaction (HER) for the first time. Surface morphology and crystalline structure of as-prepared nanoporous-WS2/AB were characterized by scanning electron microscopy and X-ray diffractometer. The electrocatalytic properties of as-prepared materials modified electrodes for HER were investigated by polarization curves, electrochemical impedance spectroscopy and Tafel polarization curves in 0.50 M H2SO4 solution. Compared with WS2, AB and WS2/AB based electrodes, nanoporous-WS2/AB based electrode exhibited a much higher electrocatalytic activity which was attributed to the synergistic effect between nanoflower WS2 and amorphous AB, as well as the presences of dual templates of amorphous AB and porous 4A-zeolite. The exchange current density of nanoporous-WS2/AB electrode was 1.6 and 2.5 times larger than that of WS2/AB and pure WS2 based electrode at −400 mV, respectively. The results indicated that nanoporous-WS2/AB composite would be a promising candidate for the potential application in HER.
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Keywords: Acetylene Black; Electrocatalysis; Hydrogen Evolution Reaction; Nanoporous Tungsten Disulfide

Document Type: Research Article

Affiliations: 1: Sichuan Yinhe Chemical Co. Ltd., Mianyang 622656, P. R. China 2: School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, P. R. China 3: Sichuan Changhong New Energy Technology Co. Ltd., Mianyang 621000, P. R. China

Publication date: February 1, 2019

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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