Preparation method of surface-functionalized molybdenum carbide-carbon catalyst for carbon dioxide hydrogenation reaction

Abstract

The application discloses a preparation method of a surface-functionalized molybdenum carbide-carbon catalyst for a carbon dioxide hydrogenation reaction. The preparation method mainly comprises the following steps: firstly, using deionized water as a solvent, uniformly mixing sodium alginate with an ammonium molybdate solution, and then putting a mixed solution into a freeze drying oven for carrying out freeze drying; secondly, carrying out high-temperature roasting in an inert atmosphere to obtain porous graphite carbon-inlaid high-dispersibility molybdenum carbide; thirdly, mechanically lapping the prepared porous graphite carbon-inlaid high-dispersibility molybdenum carbide and urea, putting a lapped material into a muffle furnace, and carrying out annealing treatment to obtain the surface-functionalized molybdenum carbide-carbon catalyst. The catalyst prepared by the preparation method has the characteristics of large specific surface area, abundant pore structures and high dispersibility, and shows good catalytic activity and selectivity in the carbon dioxide hydrogenation reaction.

Description

technical field [0001] The invention belongs to the fields of resource conversion and utilization and application of hydrogenation catalysts, and in particular relates to a preparation method of a surface-functionalized molybdenum carbide-carbon catalyst for carbon dioxide hydrogenation reaction. Background technique [0002] With the extensive use of fossil fuels, CO in the air 2 The concentration of CO increases sharply, while the CO 2 As one of the main components of greenhouse gases, it will cause a series of problems such as global warming, glacier melting and sea acidification, thus threatening the survival of human beings. Therefore, in order to reduce CO in the air 2 content, CO 2 The capture, sequestration and utilization of sequestration have gradually come into people's field of vision. Among them, CO 2 As a means of chemical utilization, catalytic hydrogenation technology can not only directly obtain clean energy and chemical raw materials CH 4 , can also b...

AI Technical Summary

Problems solved by technology

However, the current reported results show that the CO of the molybdenum carbide catalyst itself 2 The hydrogenation capacity is limited and the activity is low. Therefore, molybdenum carbide is often used as a carrier to support catalysts such as Co and Cu to increase the CO 2 Hydrogenation performance

At present, there are few reports on the modification of molybdenum carbide itself to enhance the reaction performance.

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