Molybdenum Carbide Nanoparticles Coated into the Graphene Wrapping N-Doped Porous Carbon Microspheres for Highly Efficient Electrocatalytic Hydrogen Evolution Both in Acidic and Alkaline Media.

Molybdenum carbide (MoC) is recognized as an alternative electrocatalyst to noble metal for the hydrogen evolution reaction (HER). Herein, a facile, low cost, and scalable method is provided for the fabrication of MoC-based eletrocatalyst (MoC/G-NCS) by a spray-drying, and followed by annealing. As-prepared MoC/G-NCS electrocatalyst displays that ultrafine MoC nanopartilces are uniformly embedded into graphene wrapping N-doped porous carbon microspheres derived from chitosan.