Fig. 2From: Recent advances in unveiling active sites in molybdenum sulfide-based electrocatalysts for the hydrogen evolution reaction(Figures reprinted with permission from Refs. [20, 21]) a Active sites of the nitrogenase and hydrogenase, and depiction of the Mo-edge on MoS2 slab. b Free energy diagram for hydrogen adsorption. c STM image of MoS2 nanoparticles on a Au(111) surface. d The exchange current density versus the MoS2 edge lengthBack to article page