Fabrication of N, P-codoped Mo2C/Carbon Nanofibers via Electrospinning as Electrocatalyst for Hydrogen Evolution Reaction

Pan Yang

Hexi Zhao

Yingnan Yang

Pengxiang Zhao

Xiaochong Zhao Email

Lijun Yang Email

Institute of Materials, Chinese Academy of Engineering Physics, Jiangyou, China

Abstract

Stable and efficient noble-metal-free electrocatalysts are imperative substitute of Pt-based electrocatalysts for hydrogen evolution reaction. In this study, N,P-codoped Mo2C/carbon nanofibers prepared via electrospinning and one step heat treatment, exhibited a high dispersion of Mo2C and existence of N and P, which benefit for the electrocatalytic performance of hydrogen evolution reaction. Solving ammonium phosphomolybdate hydrate (PMoHN) in precursor solution, Mo, N and P were introduced in carbon nanofibers, and dosage of PMoHN on electrocatalytic performance was investigated. Subsequently electrochemical tests reveal that 4% (wt. V-1) PMoHN shows the best catalytic performance. The overpotential under acidic (0.5 M H2SO4) and alkaline (1.0 M KOH) conditions are 196 and 107 mV to achieve the current density of 10 mA cm-2, and Tafel slopes are 81.3 and 67.5 mV dec-1 respectively. Moreover, N, P-codoped Mo2C/carbon nanofibers exhibits excellent stability under acidic and alkaline conditions.

Fabrication of N, P-codoped Mo2C/Carbon Nanofibers via Electrospinning as Electrocatalyst for Hydrogen Evolution Reaction