MoP/Co2P Hybrid Nanostructure Anchored on Carbon Fiber Paper as an Effective Electrocatalyst for Hydrogen Evolution

Abstract

AbstractDeveloping low‐cost and effective electrocatalysts for the hydrogen evolution reaction (HER) to replace Pt‐group metals is a continuous challenge. Recently, transition metal phosphides have received increasing attention owing to their high intrinsic activity in catalyzing HER in acidic media. Herein, we reported a novel hybrid nanostructure MoP/Co2P anchored on carbon fiber paper (CFP) (MoP/Co2P/CFP) which was achieved by a facile hydrothermal approach to obtain Co(CO3)0.35Cl0.20(OH)1.10 nanowires array (NA)/CFP, followed by deposition of MoO2 nanoparticles via chemical vapor deposition (CVD) in the presence of MoO3 and a subsequent in situ phosphorization process. It was worth noting that the catalyst exhibited higher catalytic activity for HER in 0.5 M H2SO4 solution, which afforded an overpotential of 140 mV at a current density of 10 mA cm−2, a Tafel slope of 80 mV dec−1, an exchange current density of 0.153 mA cm−2 and a high electrochemical double‐layer capacitance (Cdl) of 48.2 mF cm−2. Moreover, it also exhibited superior stability and durability in long‐term durability test.