https://scholars.lib.ntu.edu.tw/handle/123456789/626286
標題: | Hierarchical Ni-Mo-S nanosheets on carbon fiber cloth: A flexible electrode for efficient hydrogen generation in neutral electrolyte | 作者: | Miao J Xiao F.-X Bin Yang H Khoo S.Y Chen J Fan Z Hsu Y.-Y HAO MING CHEN Zhang H Liu B. |
公開日期: | 2015 | 卷: | 1 | 期: | 7 | 來源出版物: | Science Advances | 摘要: | A unique functional electrode made of hierarchal Ni-Mo-S nanosheets with abundant exposed edges anchored on conductive and flexible carbon fiber cloth, referred to as Ni-Mo-S/C, has been developed through a facile biomolecule-assisted hydrothermal method. The incorporation of Ni atoms in Mo-S plays a crucial role in tuning its intrinsic catalytic property by creating substantial defect sites as well as modifying the morphology of Ni-Mo-S network at atomic scale, resulting in an impressive enhancement in the catalytic activity. The Ni-Mo-S/C electrode exhibits a large cathodic current and a low onset potential for hydrogen evolution reaction in neutral electrolyte (pH ∼7), for example, current density of 10 mA/cm2 at a very small overpotential of 200 mV. Furthermore, the Ni-Mo-S/C electrode has excellent electrocatalytic stability over an extended period, much better than those of MoS2/C and Pt plate electrodes. Scanning and transmission electron microscopy, Raman spectroscopy, x-ray diffraction, x-ray photoelectron spectroscopy, and x-ray absorption spectroscopy were used to understand the formation process and electrocatalytic properties of Ni-Mo-S/C. The intuitive comparison test was designed to reveal the superior gas-evolving profile of Ni-Mo-S/C over that of MoS2/C, and a laboratory-scale hydrogen generator was further assembled to demonstrate its potential application in practical appliances. © 2015 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034092298&doi=10.1126%2fsciadv.1500259&partnerID=40&md5=5df2bae00145193af7abc519b59d1a8a https://scholars.lib.ntu.edu.tw/handle/123456789/626286 |
ISSN: | 23752548 | DOI: | 10.1126/sciadv.1500259 | SDG/關鍵字: | Carbon fibers; Catalyst activity; Electrodes; Electrolytes; High resolution transmission electron microscopy; Hydrogen production; Molybdenum; Molybdenum compounds; Nanosheets; Nickel; Scanning electron microscopy; Transmission electron microscopy; X ray absorption spectroscopy; X ray diffraction; X ray photoelectron spectroscopy; Catalytic properties; Electrocatalytic properties; Functional electrode; Hydrogen evolution reactions; Hydrogen generations; Hydrothermal methods; Neutral electrolytes; Scanning and transmission electron microscopy; Sulfur compounds |
顯示於: | 化學系 |
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