Engineering MoS₂ Basal Planes for Hydrogen Evolution via Synergistic Ruthenium Doping and Nanocarbon Hybridization.

ABSTRACT: Promoting the intrinsic activity and accessibility of basal plane sites in 2D layered metal dichalcogenides is desirable to optimize their catalytic performance for energy conversion and storage. Herein, a core/shell structured hybrid catalyst, which features few-layered ruthenium (Ru)-doped molybdenum disulfide (MoS₂) nanosheets closely sheathing around multiwalled carbon nanotube (CNT), for highly efficient hydrogen evolution reaction (HER) is reported. With 5 at% (atomic percent) Ru substituting for Mo in MoS₂, Ru-MoS₂/CNT achieves the optimum HER activity, which displays a small overpotential of 50 mV at -10 mA cm^-2 and a low Tafel slope of 62 mV dec^-1 in 1 m KOH. Theoretical simulations reveal that Ru substituting for Mo in coordi

SUBMITTER: Zhang X 

PROVIDER: S-EPMC6523370 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature