Catalytic Performance of Mesoporous Tungsten Carbide Nanoparticles
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- Category: Tungsten Information
- Published on Wednesday, 25 October 2017 21:49
Tungsten carbide has a unique physical and chemical properties, high conductivity, thermal stability and chemical stability, and better catalytic activity, etc..
Because tungsten carbide (WC) has the platinum like electrocatalytic activity and the ability to resist CO poisoning, experts and scholars at home and abroad are interested in the preparation and application of nano tungsten carbide, like other tungsten compounds, tungsten carbide with different structures also has different catalytic properties. Scholars generally believe that morphology control can effectively improve the catalytic performance of WC.
Studies have shown that, compared with other catalytic materials, the two dimensional nanosheets can provide a large number of surface atoms and more reactive centers, which is an ideal catalyst structure. What is a two-dimensional structure? Graphene is a two-dimensional structure of carbon nanoparticles. It is generally believed that the ultra thin geometry of the nanosheets facilitates the rapid transfer of the load from the inner surface to the surface during the catalytic reaction, thus speeding up the reaction process.
Just enough to fully play the form of nano tungsten carbide layer ten skill, in recent years, mesoporous materials with high specific surface area, ordered pore structure and narrow pore size distribution, pore size adjustable, the chemical catalysis function of microporous zeolite can not be completed. Some scholars believe that the nano flake tungsten carbide with mesoporous structure can give full play to the catalytic action of tungsten carbide.
The results show that the tungsten carbide nanosheets with the mesoporous structure are square and consist of tungsten carbide particles and voids, and the crystalline phase is composed of WC and W2C, the average pore of 3.5 nm, it was found that methanol added battery solution, electrocatalytic oxidation of carbide nano mesoporous structure has good catalytic activity, and showed similar characteristics with the double oxidation peaks of platinum catalyst. This lays a foundation for the preparation of tungsten carbide electrocatalytic materials with high catalytic activity and platinum like catalytic properties.
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