Bi-axial grown amorphous MoS_x bridged with oxygen on r-GO as a superior stable and efficient nonprecious catalyst for hydrogen evolution.

ABSTRACT: Amorphous molybdenum sulfide (MoS_x) is covalently anchored to reduced graphene oxide (r-GO) via a simple one-pot reaction, thereby inducing the reduction of GO and simultaneous doping of heteroatoms on the GO. The oxygen atoms form a bridged between MoS_x and GO and play a crucial role in the fine dispersion of the MoS_x particles, control of planar MoS_x growth, and increase of exposed active sulfur sites. This bridging leads to highly efficient (-157 mV overpotential and 41 mV/decade Tafel slope) and stable (95% versus initial activity after 1000 cycles) electrocatalyst for hydrogen evolution.

SUBMITTER: Lee CH 

PROVIDER: S-EPMC5247739 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature