Preparation method of noble metal-loaded active carbon material catalyst

Abstract

The invention discloses a preparation method of a noble metal-loaded active carbon material catalyst. The preparation method comprises the steps of preparing a nitrogen-doped active carbon material; mixing the nitrogen-doped active carbon material with a noble metal acid solution to enable acid radical ions to be adsorbed to a nitrogen functional group-containing active site on the surface of the material; and filtering, drying and reducing to obtain an active carbon material with noble metals dispersed on the surface of the active carbon material and in holes. The preparation method further comprises the steps of oxidizing the active carbon material, and then performing high-temperature ammoniation treatment under the ammonia atmosphere to obtain a nitrogen-doped active carbon material; uniformly mixing the ammoniated nitrogen-doped active carbon material with the noble metal acid solution, and adsorbing through the noble metal acid solution; filtering and drying, and performing in-situ reduction by low-temperature cold plasmas to obtain the active material with the noble metals dispersed on the surface of the active carbon material and in the holes. The method is simple and effective, is easy to operate, facilitates large-scale batch production and is suitable for being applied in industrial production.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a preparation method of an activated carbon material catalyst loaded with precious metals. Background technique [0002] Activated carbon as a catalyst support has many advantages, such as low cost, large specific surface area, good adsorption performance, and easy preparation, which are of great significance for industrial applications. [0003] Surface modification of activated carbon materials and loading of catalysts is one of the current research hotspots, because doping nitrogen-containing and oxygen-containing functional groups in activated carbon can greatly change the surface structure of the material, adjust its pore structure, and enhance its hydrophilicity. properties, improving the electron transport rate of materials, thereby expanding the application range of activated carbon materials in various fields (J.Phys.Chem.C 2010,114,8581; Carbon 2011,49,844; ...

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Problems solved by technology

There are many preparation methods for activated carbon-supported noble metal catalysts, such as impregnation-liquid phase reduction method, microwave heating method, adsorption-heat treatment reduction method, etc. Although activated carbon loaded with different noble metals can be obtained as catalysts through these methods, there are still many problems. , such as: the process is cumbersome and complicated and the environment is not friendly, the reduction and heat treatment process consumes a lot of energy and the catalyst morphology is not controlled, etc.

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