Method for preparing supported type nano Pt(Pt-M)/carrier catalyst

Abstract

The invention relates to a preparation method of a load-typed nanometer Pt (Pt-M) / carrier catalyst, which comprises that a carrier is uniformly dispersed in a chloroplatinic acid solution to obtain an electrolyte which is then infused to a ultrasound-imposed double-platinum-electrode electrolysis bath for electrodeposition, so as to obtain a catalyst suspension of a nanometer Pt (Pt-M) catalyst which is uniformly loaded on the carrier and then separated to obtain the load-typed nanometer Pt (Pt-M) / carrier catalyst. The preparation method loads the nanometer Pt (Pt-M) on the carrier directly, thus avoiding the defects of high-temperature reduction or use of reducers for preparation of other methods; the preparation method does not require to conduct separate activation or modification treatment to the carrier and has the advantages of simple process and catalyst with adjustable size, low cost and no environmental pollution, thus being a universal method easy for industrialized massive production. By determining with cyclic volt-ampere curves, in terms of performance, 40 percent load-typed nanometer Pt / C catalyst prepared by the invention is superior to similar products produced by the worldwide advanced Johnson Matthey Company.

Description

technical field [0001] The invention relates to a loaded nano-Pt (Pt-M) / carrier catalyst material widely used in industrial fields such as fuel cells, chemical industry, petroleum, and environmental protection, which is a loaded nano-Pt (Pt-M) / carrier catalyst preparation method, can obtain the nanometer Pt (Pt-M) catalyst loaded on different carriers and different particle sizes. Background technique [0002] Due to the wide application of Pt and its Pt-M catalyst, and the shortcomings of existing methods for preparing Pt(Pt-M) / support, the research on the preparation of Pt(Pt-M) / support has extremely important practical value. [0003] At present, there are two main methods for preparing Pt(Pt-M) / carrier: 1. Immersion reduction method: soak the carrier with a compound solution containing the required metal elements, then take it out and dry it, and finally obtain the obtained product by reducing it under a reducing atmosphere at high temperature. Single metal or alloy i...

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Problems solved by technology

[0004] However, the above two methods have inherent disadvantages: the final stage of the impregnation reduction method needs to be reduced with a reducing atmosphere at a higher temperature, which is time-consuming, wastes energy, and the metal particles will grow up, and the catalytic activity will decrease; the sol method needs to prepare tiny metal particles first. And prepare into a sol, the process is cumbersome, the time required is relatively long, and the agglomeration of metal particles is not easy to control

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