%0 Journal Article
%T Engineering MoS2 Basal Planes for Hydrogen Evolution via Synergistic Ruthenium Doping and Nanocarbon Hybridization
%A Feng Zhou
%A Shen Zhang
%A Xing Zhang
%A Yongye Liang
%J Archive of "Advanced Science".
%D 2019
%R 10.1002/advs.201900090
%X 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 coordination with six S atoms is thermodynamically stable, and the in©\plane S atoms neighboring Ru dopants represent new active centers for facilitating water adsorption, dissociation, and hydrogen adsorption/desorption. This work provides a multiscale structural and electronic engineering strategy for synergistically enhancing the HER activity of transition metal dichalcogenides
%K carbon nanotubes
%K core/shell structure
%K hydrogen evolution electrocatalysis
%K molybdenum sulfide
%K ruthenium doping
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6523370/