標題: Enhancing the electrocatalytic water splitting efficiency for amorphous MoSx
作者: Hsu, Chang-Lung
Chang, Yung-Huang
Chen, Tzu-Yin
Tseng, Chien-Chih
Wei, Kung-Hwa
Li, Lain-Jong
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Hydrogen evolution reaction;Electrocatalytic reaction;Molybdenum disulfide;Niobium chloride
公開日期: 26-三月-2014
摘要: Amorphous molybdenum sulfide (MoSx) materials have been considered as cheap and promising catalysts for hydrogen evolution reaction (HER). In this contribution, we report that the amorphous MoSx catalysts prepared by the low temperature thermolysis of the (NH4)(2)MoS4 precursors on carbon clothes (catalyst loading: 3.2 mg/cm(2)) exhibit a Tefal slope of 50.5 mV/dec and a high exchange current density of 1.5 x 10(-3) mA/cm(2) in 0.5 M H2SO4 solutions. Spectroscopic studies of the amorphous MoSx catalysts show that the increase of HER efficiency is positively correlated to the concentration of S-2(2-) species, providing strong evidence to support the argument that S-2(2-) is an active species for electrocatalytic HER. Additionally, the method for preparing catalysts is simple, scalable and applicable for large-scale production. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ijhydene.2014.01.090
http://hdl.handle.net/11536/24279
ISSN: 0360-3199
DOI: 10.1016/j.ijhydene.2014.01.090
期刊: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume: 39
Issue: 10
起始頁: 4788
結束頁: 4793
顯示於類別:期刊論文


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