Method for preparing titanium dioxide doped platinum catalyst

Abstract

The invention discloses a method for preparing a titanium dioxide doped platinum catalyst. The method comprises the following steps: preparing a platinum ion alcohol solution, namely, preparing the platinum ion alcohol solution from polyvinylpyrrolidone as an additive, performing a sealed reaction for 4-8 hours, and naturally cooling to the room temperature so as to obtain a reaction alcohol solution; putting the reaction alcohol solution into a vacuum distillation device, performing vacuum distillation for 2-8 hours so as to obtain a concentrated solution; slowly putting distilled water intothe concentrated solution, uniformly stirring till stable suspended precipitate is formed, and filtering so as to obtain nano platinum granules; stirring nano titanium dioxide, putting into the nano platinum granules, putting into deionized water, performing ball-milling, and performing a stirring reaction for 2-5 hours under radiation of an ultraviolet lamp so as to obtain a suspension; filteringthe suspension so as to obtain precipitate, and sequentially washing the precipitate with absolute ethyl alcohol, methanol and deionized water, thereby obtaining the titanium dioxide doped platinum catalyst. The catalyst prepared by using the method is good in acid-alkali stability and excellent in photoelectric property, and the catalysis efficiency of a noble metal catalyst is improved.

Description

technical field [0001] The invention belongs to the technical field of noble metal catalysts, and in particular relates to a preparation method of a titanium dioxide-doped platinum catalyst. Background technique [0002] At present, a precious metal catalyst is a precious metal material that can change the speed of a chemical reaction without itself participating in the final product of the reaction. Almost all noble metals can be used as catalysts, but platinum, palladium, rhodium, silver, ruthenium, etc. are commonly used, among which platinum and rhodium are the most widely used. Their d electron orbitals are not filled, the surface is easy to adsorb reactants, and the strength is moderate, which is conducive to the formation of intermediate "active compounds", has high catalytic activity, and also has comprehensive excellent properties such as high temperature resistance, oxidation resistance, and corrosion resistance. , to be the most important catalyst material. Pt i...

AI Technical Summary

Problems solved by technology

The stability and durability of monometallic Pt catalysts are poor, and Pt nanoparticles will gradually dissolve and combine in the fuel cell reaction, resulting in a reduction in the active area of ​​the catalyst, a reduction in electrocatalytic performance, and a shortened service life.