Ni2P/CoP loading on Porous carbon matrix for hydrogen evolution

Yuelong Xu,Zhenfa Liu

doi:10.1051/e3sconf/202126702047

Abstract

Due to high specific surface and plentiful of porosity, 3D porous carbon matrix has shown enormous potential for catalyst supporters. Hydrogen was thought as the next-generation clean energy to substitute the fossil fuel. Metal phosphides has been investigated and exhibited a good catalytic performance for hydrogen evolution reaction (HER). In this work, we prepared Ni2P/CoP loading on Porous carbon matrix through a facile method. The mixture of nickel nitrate, cobalt nitrate and chitosan was ball-milled, then was carbonized under N2 atmosphere at 900°C with NH4HPO2. The as-obtained materials were characterized by X-Ray diffraction (XRD), SEM and Raman spectrums. Also the electrochemical performance for HER was test using electrochemical workstation. The result shown that this catalysts presented a low overpotential at 10 mA cm-2, which was 270 mV.

Highlights

Because of eco-friendly, clean and renewable advantages, hydrogen had been widely investigated to develop the application [1]
The overpotentials at a current density of 10 mA cm-2 was low to 65 mV, which was superior to the nanoparticle-stacked disordered porous structure
Preparation of catalysts: Ni(NO3)2, Co(NO3)2, chitosan and NH4HPO2 were mixed using ball-milling for 4h, the mixture were carbonization under N2 atmosphere at 900燠 to obtain a black materials, which was denoted as Ni2P/CoP/CN

Summary

Introduction

Because of eco-friendly, clean and renewable advantages, hydrogen had been widely investigated to develop the application [1]. The traditional catalysts were noble metal compounds, such as Pt / C, the unique electron structure could facilitate the adsorption of intermediate H 熼 and form H-H for hydrogen evolution. The transition metal compounds, such as such as Chalcogenides [4,5,6], carbides [7,8,9,10], and phosphides [11,12,13], had played a vital role to catalyze the hydrogen production. This aforementioned compounds exhibited a good conductivity, abundant of active sites and low overpotentials for the reaction process. The overpotential was 270 mV at a current density of 10 mA cm-2

Methods

Discussion

Conclusion