Reduced Graphene Oxide-Supported MoP@P-Doped Porous Carbon Nano-octahedrons as High-Performance Electrocatalysts for Hydrogen Evolution

Hydrogen as a clean and environmentally friendly energy carrier has attracted extensive interest. Although Pt-based materials have been considered as the state-of-the-art catalysts for the hydrogen evolution reaction (HER), the high-cost and low-abundance hinder their practical application. Herein, we report the development of reduced graphene oxide (rGO) supported molybdenum phosphide (MoP) encapsulated in P-doped porous carbon (PC) nano-octahedrons derived from polyoxometalate-based metal organic frameworks (POMOFs) by carbonization and subsequent phosphidation process. Impressively, combining the advantages of MoP, PC, and rGO, the composite shows superior electrocatalytic HER performance and stability, with a low onset overpotential of 62.3 mV, small Tafel slope of 53.6 mV dec(-1), along with long-term durability for 10 h, which is comparable or even superior to those of the most promising MoP-based electrocatalysts in acid media reported to date. Most importantly, this work provides an elaborate strategy to design and fabricate high-efficiency and low-cost electrocatalysts utilizing POMOFs as precursors toward the HER