Journal
NANOTECHNOLOGY
Volume 29, Issue 38, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aacfd7
Keywords
solid solutions; water splitting; electrospinning; carbon nanofibers; hydrogen energy
Funding
- National Natural Science Foundation of China (NSFC) [51573166]
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A facile method to prepare nitrogen anion-decorated cobalt tungsten disulfides solid solutions, retaining ultra-thin WS2-like nanosheet structures (The N-CoxW1-xS2) anchored on carbon nanofibers (CNFs), is developed. The synergistic effect of the WS2 nanosheets provides a secure framework for stabilizing the amorphous Co-S clusters, CNFs substrate and nitrogen anion-decoration significantly enhances the inherent conductivity of the catalyst, resulting in a significantly promoted hydrogen evolution reaction activity and stable performance compared to pure Co9S8 nanoparticles or ultra-thin WS2 nanosheets. The N-CoxW1-xS2 electrode demonstrates the excellent electrocatalytic performance, with current density of 10 mA cm(-2) at a low overpotential of 93 mV and Tafel slope of 85 mV dec(-1), as well as the long-term stability in acid electrolyte. The present investigation may provide a feasible strategy for incorporating other heteroatoms into transitional metal disulfides materials to design catalysts with highly active and stable performance for water splitting.
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