Preparation method of porous carbon loaded tungsten carbide composite material

Abstract

The invention discloses a preparation method of a porous carbon loaded tungsten carbide composite material, and belongs to the technical field of material science. According to the material, tungstencarbide nanoparticles are uniformly loaded on a carbon skeleton with a large number of network pore channel structures in a high-dispersion manner. The specific preparation method comprises the following steps: taking metal nitrate, a tungsten source, fuel and a soluble organic carbon source as raw materials; carrying out a solution combustion synthesis reaction to obtain a precursor in which tungsten oxide and other metal oxides are uniformly embedded in a carbon matrix, and carrying out subsequent high-temperature carbonization and acid washing to remove the oxides by using a synergistic coupling pore-forming effect, thereby obtaining the porous carbon-loaded tungsten carbide material with the specific surface area of 1,000 m < 2 > / g or above. According to the invention, raw materials are easy to obtain, the process is simple, and the equipment requirement is low; the prepared porous carbon-loaded tungsten carbide powder material is fine in particle, narrow in particle size distribution and good in dispersity, has high specific surface area and pore volume, is uniformly loaded with tungsten carbide particles, is not easy to fall off, can remarkably reduce the cost of an electrocatalyst and improve the hydrogen evolution catalytic performance of the electrocatalyst as a platinum-substituted catalyst, and has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to designing a method for preparing a porous carbon-loaded tungsten carbide composite material with a high specific surface area. Background technique [0002] Energy shortage and environmental pollution are two major problems facing the development of human society since the 21st century. Therefore, it is imperative to find clean and renewable energy and develop efficient energy storage and conversion technologies. Hydrogen energy is regarded as the most ideal energy carrier due to its high calorific value, high energy density (143KJ / g) and abundant reserves. In recent years, electrolysis of water to produce H 2 (HER) is considered to be an ideal method to prepare clean hydrogen energy, which is of great significance to alleviate the energy crisis and reduce the emission of greenhouse gases. The core problem of this method is to develop efficient, stable and ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to improve the problems of low hydrogen evolution catalytic activity and poor stability of existing tungsten carbide catalysts, and design a composite carbon-based precursor for the synthesis of various metal oxides (tungsten oxide + other metal oxides) by solution combustion, and then Subsequent high-temperature carbonization reaction and washing in acidic solution to remove oxides to obtain porous carbon-supported tungsten carbide composite materials, thus developing a fast, simple, efficient and low-cost method for preparing new tungsten carbide catalysts