“…132 Compared to the conventional solid-phase approach, the molten salt method can prepare products with a uniform chemical composition, great crystal morphology, and pure phase by using a low melting point salt as a reaction medium at low temperatures for a short time. 133–137 Based on this method, the as-obtained fluffy and porous nanoflower-like structure showed a large specific surface area, resulting in exposing more active sites and promoting charge transfer. The optimal Ni-doped Mo 2 C electrocatalyst exhibited high-efficient HER performance with a low overpotential of 56 mV at 10 mA cm −2 , a small Tafel slope of 27.4 mV dec −1 , and long-term stability for 35 h electrolysis in 0.5 M H 2 SO 4 solution, which is superior to most of the noble-metal-free electrocatalysts.…”