Preparation method of mesoporous carbon-tungsten carbide composite material supported platinum catalyst

Abstract

The invention provides a mesoporous carbon-tungsten carbide composite material platinum-supporting catalyst preparation method, and belongs to the technical field of inorganic material preparation. The preparation method comprises: preparing a tungsten electrode, inflating, opening a plasma heating reaction, collecting a product, loading platinum, and other steps. According to the present invention, the preparation method has advantages of simple preparation process, short preparation time, environmentally friendly preparation process, high yield, low preparation cost and the like; the mesoporous carbon-tungsten carbide nano-sphere composite structure is prepared through the one-step method, such that the agglomeration phenomenon of the tungsten carbide nanoparticles is substantially reduced; the prepared tungsten carbide nano-sphere particles have advantages of small particle size, narrow particle size distribution, good crystallinity and good monodispersity; and the synergistic effect and the structural effect of the prepared composite catalyst further improve the catalytic performance and the anti-oxidation performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic materials, and in particular relates to a method for preparing a mesoporous carbon-tungsten carbide composite material-supported platinum catalyst. Background technique [0002] In recent years, tungsten carbide, which can be used in methanol fuel cells as a substitute for noble metal platinum, has attracted great attention. This is because tungsten carbide has a surface electronic structure similar to that of noble metal platinum, so it exhibits peculiar properties in some electrochemical reactions. Platinum catalytic activity. Studies have shown that, in addition to its low price, the main advantage of tungsten carbide as an anode catalyst is that it not only has catalytic performance comparable to platinum, palladium and other precious metals, but also has good electrical conductivity and strong acid resistance and The advantage of not being easily poisoned by carbon monoxide....

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Problems solved by technology

The main performance is that the steps of the above-mentioned experimental preparation method are complicated, the preparation procedure is cumbersome, the preparation process is unfriendly and time-consuming, and most of them still require subsequent treatment processes, resulting in high preparation costs, which are not conducive to industrialized large-scale production.

Although Pak et al. (Int.Journal of Refractory Metals and Hard Materials 48(2015) 51–55) prepared a tungsten carbide carbon composite structure with the help of a novel discharge plasma technology, in addition to the shortcomings of small output, there are also tungsten carbide particle sizes. Larger (size distribution peak at 20-30nm), even particles of hundreds of nanometers appear, which greatly affects the catalytic performance

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