In situ fabrication of porous MoS2 thin-films as high-performance catalysts for electrochemical hydrogen evolution.

Amorphous MoS2 porous thin films (denoted as MoS2 PTFs) with high activity towards hydrogen evolution reaction (HER) were fabricated by in situ sulfuration of a Mo substrate. A small overpotential (∼120 mV) and a low Tafel slope (∼41 mV dec−1) can be observed and their excellent performance was ascribed to the combination of the amorphous feature, porous structure and optimized thickness. [ABSTRACT FROM AUTHOR]