Binary transition metal dichalcogenides (TMDs) usually exhibit high hydrogen evolution reaction (HER) activities; however, the facile and efficient synthesis of ternary TMDs alloys remains a challenge. In this study, we reported an efficient method of synthesis for a MoS2(1-x)Se2x ternary alloy in a CVD system, and carbon nanofibers serve as the substrate. The MoS2(1-x)/CNFs hybrids were directly used as hydrogen evolution cathodes and exhibit lower onset potentials and excellent durability, suggesting they have significantly enhanced catalytic activity and could serve as effective and promising catalysts for the HER. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.