Multivariate Control of Effective Cobalt Doping in Tungsten Disulfide for Highly Efficient Hydrogen Evolution Reaction.

ABSTRACT: Tungsten Disulfide (WS₂) is considered to be a promising Hydrogen Evolution Reaction (HER) catalyst to replace noble metals (such as Pt and Pd). However, progress in WS₂ research has been impeded by the inertness of the in-plane atoms during HER. Although it is known that microstructure and defects strongly affect the electrocatalytic performance of catalysts, the understanding of such related catalytic origin still remains a challenge. Here, we combined a one-pot synthesis method with wet chemical etching to realize controlled cobalt doping and tunable morphology in WS₂. The etched products, which composed of porous WS₂, CoS₂ and a spot of WO_x, show a low overpotential and small Tafel slope in 0.5 M H₂SO₄

SUBMITTER: Zhou L 

PROVIDER: S-EPMC6362019 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature