Novel cobalt/nickel–tungsten-sulfide catalysts for electrocatalytic hydrogen generation from water

Title
Novel cobalt/nickel–tungsten-sulfide catalysts for electrocatalytic hydrogen generation from water
Other Titles
nickel?tungsten-sulfide catalysts for electrocatalytic hydrogen generation from water
Author
Tran Dinh Phong
Keywords
AMORPHOUS MOLYBDENUM SULFIDE; HYDRODESULFURIZATION CATALYSTS; STRUCTURAL-CHARACTERIZATION; EVOLUTION; MOS2; NI; COBALT; CO; TETRATHIOMOLYBDATE; SPECTROSCOPY
Issue Date
2013-06
Publisher
Royal SOC Chemistry
Citation
Energy and Environmental Science, 2013, 6(8), P.2452-2459
Abstract
The potential of water (photo)electrolysis technology to provide hydrogen as a fuel on a large scale depends on how viable electrocatalysts for the water oxidation reaction (WOR) and the hydrogen evolution reaction (HER) are and whether they can be constructed from elements which are abundant in the Earth's crust. Here we show that ternary sulfides of cobalt–tungsten and nickel–tungsten (MWSx where M is Co or Ni) are efficient and robust electrocatalysts for the HER in water over a wide pH range. These novel ternary sulfides were readily grown on a conducting electrode surface by employing a scalable electrodeposition process from aqueous solutions of [M(WS4)2]2−. In terms of HER activity, the MWSx catalysts represent attractive alternatives to platinum. Moreover, we show that the HER activity is governed by the nature of the metal M within M–S–W heterobimetallic sulfide centres, located in the WS2-like layered structure of MWSx. Our work provides structural and mechanistic keys to understand how HER activity is promoted in previously described nickel and cobalt-doped molybdenum and tungsten sulfide materials.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2013/EE/c3ee40600h#!divAbstract
ISSN
1754-5692
DOI
10.1039/C3EE40600H
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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