Carbon-coated nickel oxide catalyst and preparation method and application thereof

Abstract

The invention provides a carbon-coated nickel oxide catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: providing a carbon-coated nickel nano composite material as raw powder, adding a binder into the raw powder, and mixing to obtain a wet material block; drying the wet material block, and then carrying out first roasting treatment in an inert atmosphere; preparing a second metal salt solution, uniformly mixing a product after the first roasting treatment with the second metal salt solution, and stirring to obtain a solid-liquid mixture; the solid-liquid mixture is dried and then subjected to molding treatment; carrying out second roasting treatment on the molded product in the air to obtain the carbon-coated nickel oxide catalyst; the second metal salt solution is selected from an alkali metal salt solution and / or an alkaline earth metal salt solution. The nano composite material is used as raw powder and a second metal oxide is used as an auxiliary agent to prepare the catalyst, and the catalyst is processed through a specific process, so that the specific surface, the pore volume and the pore diameter of the catalyst can be adjusted, and the catalyst has relatively high catalytic activity and mechanical strength and has a relatively excellent effect on catalytic decomposition of nitrous oxide.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a carbon-coated nickel oxide catalyst, a preparation method and application thereof. Background technique [0002] Transition metal oxides have excellent catalytic properties and photoelectromagnetic properties, and are research hotspots in the field of inorganic materials. Carbon materials have good electrical conductivity, good chemical / electrochemical stability, and high structural strength. Coating the nanoparticles of active metals or metal oxides with carbon materials can effectively improve the conductivity and stability of the nanomaterials, and have a limited effect on the nanoparticles so that they are not easy to agglomerate. In recent years, carbon-coated metal nanomaterials have not only been widely used in the fields of electrocatalysis, supercapacitor materials, lithium-ion battery anode materials, and bioengineering, but also show good application prospects in the field ...

AI Technical Summary

Problems solved by technology

Noble metal catalysts (such as Rh and Ru) have high low-temperature catalytic activity for N2O catalytic decomposition (250℃~350℃ range, can efficiently decompose N2O) , but the high price limits the large-scale application of noble metal catalysts

The price of molecular sieve catalysts and transition metal oxide catalysts is significantly lower than that of noble metals, but the activity of these two types of catalysts for the catalytic decomposition of N2O is relatively low, and the temperature range for efficient decomposition is 450°C to 550°C. ℃

Images