Abstract
The development of non-noble metal hydrogen evolution catalysts that can replace Pt is crucial for efficient hydrogen production. Herein, we develop a type of well-dispersed Ni2P on N-doped nanomesh carbon (NC) electrocatalyst by a facile pyrolysis method, which shows excellent hydrogen evolution reaction (HER) catalytic performance. It is rather remarkable that the overpotential of Ni2P/NC prepared under optimal proportion is 108 mV at 10 mA·cm−2 current density in 1 M KOH solution with the tafel slope of 67.3 mV·dec−1, the catalytic activity has no significant attenuation after 1000 cycles of cyclic voltammetry (CV)method. The hydrogen evolution performance of the electrocatalytic is better than most similar catalysts in alkaline media. The unique mesh structure of the carbon component in the catalyst facilitates the exposure of the active site and reduces the impedance, which improves the efficiency of electron transport as well as ensuring the stability of the hydrogen evolution reaction. In addition, we prove that nitrogen doping and pore structure are also important factors affecting catalytic activity by control experiments. Our results show that N-doped nanomesh carbon, as an efficient support, combined with Ni2P nanoparticles is of great significance for the development of efficient hydrogen evolution electrodes.
Highlights
For the past several years, great changes have taken place in the environment due to the burning of fossil fuels
After the solvent was removed by rotary evaporation, the mixture was annealed in Ar atmosphere and kept at 750 ◦C for 2 h with a 10 ◦C/min heating rate
The preparation process of Ni2P/nanomesh carbon (NC) is shown in Scheme 1
Summary
For the past several years, great changes have taken place in the environment due to the burning of fossil fuels. As alternatives to fossil fuels, many new environment-friendly energy sources have been developed, such as water energy, wind energy, hydrogen energy, and so on [1]. As a kind of energy with high energy density and no pollution, has attracted extensive attention [2,3,4]. It mainly comes from the following sources: coal gasification, natural gas reformation, organisms and electrolysis of water. In order to reduce the energy consumption in the hydrogen evolution reaction (HER) process and accelerate the rate of HER, platinum and other noble metal catalysts with low overpotential and Tafel slope have been developed [7,8,9]. The development of high-efficiency non-noble metal catalytic electrodes for hydrogen evolution is of great significance
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