Facile Synthesis of N‐Doped Hollow Carbon Spheres @MoS2 via Polymer Microspheres Template Method and One‐Step Calcination for Enhanced Hydrogen Evolution Reaction

Abstract MoS 2 , as a catalyst, has attracted broad attention in recent years due to its high catalytic activity and low cost. However, MoS 2 stacks readily, especially the one synthesized by calcination which is close to bulk, so it limits the number of exposed active site. Carbon materials possess excellent electrical conductivity and large surface area. In this paper, N‐doped hollow carbon sphere coated MoS 2 (NHCS@MoS 2 ) nanocomposites are synthesized via one‐step calcination treatment of the polypyrrole@(NH 4 ) 2 MoS 4 core shell structure directly. Compared with bare MoS 2 , the NHCS@MoS 2 shows remarkably high electrocatalytic activity for hydrogen evolution with the overpotential of 190 mV to reach the current density of 10 mA cm −2 . Both small tafel slope and R ct suggest that NHCS@MoS 2 has a high hydrogen dissociation rate. Furthermore, it also exhibits excellent stability.