Porous Molybdenum-Based Hybrid Catalysts for Highly Efficient Hydrogen Evolution

We have synthesized a porous Mo-based composite obtained from a polyoxometalate-based metal-organic framework and graphene oxide (POMOFs/GO) using a simple one-pot method. The MoO2@PC-RGO hybrid material derived from the POMOFs/GO composite is prepared at a relatively low carbonization temperature, which presents a superior activity for the hydrogen-evolution reaction (HER) in acidic media owing to the synergistic effects among highly dispersive MoO2 particles, phosphorus-doped porous carbon, and RGO substrates. MoO2@PC-RGO exhibits a very positive onset potential close to that of 20% Pt/C, low Tafel slope of 41mVdec(-1), high exchange current density of 4.8x10(-4)Acm(-2), and remarkable long-term cycle stability. It is one of the best high-performance catalysts among the reported nonprecious metal catalysts for HER to date.