Carbonized fiber paperboard loaded Mo2C/NC catalyst as well as preparation method and application thereof

Abstract

The invention provides a carbonized fiber paperboard loaded Mo2C / NC catalyst as well as a preparation method and application thereof. The method for preparing the carbonized fiber paperboard loaded Mo2C / NC catalyst comprises the following steps: dissolving a molybdenum source and a nitrogen source in a solvent to obtain an impregnation liquid, impregnating afiber paperboard with the impregnation liquid, and then drying and carbonizing the fiber paperboard impregnated with the impregnation liquid to obtain a carbonized fiber paperboard loaded molybdenum carbide catalyst. According to the methodfor preparing thecarbonized fiber paperboard loaded Mo2C / NC catalyst, the fiber paperboard is used as a substrate (carbon source); dipping of the molybdenum source and thenitrogen source on the fiberpaperboard is carried out; after high-temperature carbonization, Mo2C nanosheets are formed on the fiber paperboard in situ and dispersed in a nitrogen-doped carbon matrix to form a nano composite structure; by doping nitrogen, the dispersity of molybdenum carbide on a carbon material is improved, the fiber paperboard has good conductivity after being carbonized, electron transfer between the catalyst and an electrode is promoted, the catalyst has high electro-catalytic performance, and the fiber paperboard is wide in source and low in price.

Description

technical field [0001] The invention belongs to the technical field of hydrogen evolution catalysts for electrolysis of water, in particular to a Mo 2 C / NC catalyst, its preparation method and application. Background technique [0002] Hydrogen is one of the most important industrial raw materials, with an annual output of about 500 billion cubic meters, and is currently widely used in petroleum refining and ammonia synthesis. However, the current industrial production of hydrogen mainly uses fossil fuels as raw materials, and the production process produces a large amount of greenhouse gas carbon dioxide. Therefore, more efforts are needed to develop cleaner and sustainable hydrogen production methods. Electrocatalytic water splitting to produce hydrogen is a promising alternative method for hydrogen production from fossil fuels. At present, the key to electrocatalytic water splitting for hydrogen production is the research on high-performance catalysts. [0003] Molybde...

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Problems solved by technology

[0003] Molybdenum carbide (Mo 2 C) It has the characteristics of low cost, high melting point, good electrical conductivity and high catalytic activity. As a catalyst, it is widely used in electrocatalytic hydrogen evolution technology. Molybdenum carbide catalysts are usually prepared by high-temperature metal molybdenum carbide and graphite, but in the high-temperature roasting process It is very easy to agglomerate the molybdenum carbide particles, so that the active component Mo in the prepared catalyst 2 The specific surface area of ​​C is small, and the catalytic activity of electrocatalytic hydrogen evolution is low. At the same time, the conductivity of molybdenum carbide is poor, which hinders the transfer of electrons between the catalyst and the electrode, so that the efficiency of electrocatalytic hydrogen evolution and hydrogen production is low.

In order to solve this problem, in the prior art, molybdenum carbide is loaded on graphene, carbon cloth, nickel foam and other carrier materials to improve the dispersion of molybdenum carbide, improve the catalyst activity, and improve the conductivity of molybdenum carbide, thereby Improve the electrocatalytic water splitting hydrogen production performance of the catalyst, but the price of graphene, carbon cloth, nickel foam and other materials is relatively expensive, and the cost of using it as a catalyst carrier is relatively high

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