Preparation method of platinum/titanium carbide nanosheet/graphene three-dimensional composite electrode catalyst

Abstract

The invention provides a preparation method of a platinum / titanium carbide nanosheet / graphene three-dimensional composite electrode catalyst, and relates to the field of electrode catalysts, and the preparation method comprises the following steps: firstly, etching carbon-aluminum-titanium by using lithium fluoride and hydrochloric acid, carrying out ultrasonic treatment to obtain titanium carbidenanosheets, then ultrasonically dispersing the titanium carbide nanosheets into an ethylene glycol solution, adding graphene oxide, performing ultrasonic mixing treatment again, adding a platinum salt solution, stirring to fully mix, performing hydrothermal reaction to obtain a hydrogel product, performing dialysis and water washing treatment, and performing freeze drying to obtain the platinum / titanium carbide nanosheet / graphene three-dimensional composite electrode catalyst. According to the preparation method, titanium carbide nanosheets and graphene are taken as templates, and crystal platinum nanoparticles are deposited on the surfaces of the templates, so that the prepared composite electrode catalyst has the advantages of three-dimensional porous structure, high catalytic activityand high toxicity resistance.

Description

technical field [0001] The present invention relates to a kind of preparation method of electrode catalyst, specifically, relate to a kind of preparation method of platinum / titanium carbide nano sheet / graphene three-dimensional composite electrode catalyst. Background technique [0002] With the increasingly prominent problems of energy crisis and environmental pollution in today's world, the development of efficient and clean energy production system has important practical significance for the sustainable development of modern society. Direct methanol fuel cells have attracted widespread attention because of their high energy density, low pollution emissions, simple structure, and easy fuel storage. Platinum metal is recognized as the best catalyst material for methanol oxidation reaction, but the high price and easy poisoning characteristics of platinum hinder its large-scale commercial application to a large extent. Therefore, the synthesis of new composite platinum-bas...

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Problems solved by technology

[0004] Chinese Patent No. CN201710324833.7 discloses a preparation method of a two-dimensional titanium carbide / carbon nanotube-supported platinum particle composite material, using HF to chemically exfoliate Ti 3 AlC 2 The two-dimensional titanium carbide is prepared from the aluminum atomic layer in the solvothermal method, and the two-dimensional titanium carbide is combined with the MWNTs, and the platinum nanoparticles are loaded at the same time, that is, the Ti 3 C 2 / MWNTs-Pt nanocomposites; however, similar to other two-dimensional sheet materials, Ti 3 C 2 Due to the strong attraction between different sheets of nanosheets, agglomeration and stacking are prone to occur, and the interlayer spacing is small. These problems greatly limit the transmission speed of electrolyte ions in the material, and will lead to partial reactions. The active sites are covered to reduce the catalytic efficiency, which seriously reduces the Ti 3 C 2 Electrochemical activity of / MWNTs-Pt nanocomposites

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