A preparation method of black phosphorus titanium dioxide heterogeneous structure material loaded noble metal nanoparticles

Abstract

The invention provides a preparation method of a black phosphorus TiO2 heterojunction structure material loaded precious metal nanoparticle. The preparation method comprises the steps of preparing a black phosphorus TiO2 heterojunction structure material, in which a black phosphorus nanosheet layer material and a TiO2 nanosheet layer material are ball-milled under argon protection, the black phosphorus nanosheet layer material and the TiO2 nanosheet layer material are respectively washed with ethanol and water, and the black phosphorus TiO2 heterojunction structure material is obtained by suction filtration, is dried in vacuum and is collected; and dispersing the black phosphorus TiO2 heterojunction structure material in the ethanol, adding a stabilizer and a metal precursor after ultrasonic processing, continuing to perform ultrasonic stirring, adjusting pH to 9-11, adding a reducing agent, continuing to stir, and obtaining the black phosphorus TiO2 heterojunction structure material loaded precious metal nanoparticle after vacuum drying. The black phosphorus TiO2 heterojunction structure material carrier is combined with precious metal better, and the electrochemical activity and the stability of a fuel cell catalyst are effectively improved; and moreover, the preparation process is easy to operate and is suitable for production on a large scale.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a fuel cell anode catalyst material, in particular to a preparation method of a black phosphorus titanium dioxide heterogeneous structure material loaded with precious metal nanoparticles. Background technique [0002] Due to the depletion of global fossil energy resources and the aggravation of environmental pollution, it is urgent for people to find clean and efficient new environmentally friendly energy sources. Among them, fuel cells are used in various fields due to their high energy density and wide range of fuel sources. The key to the energy conversion efficiency of fuel cells is the catalyst. The electrocatalysts of direct alcohol fuel cells are dominated by noble metals, but the reserves of noble metals in nature are limited and expensive, and they are easily poisoned by intermediate products. Therefore, precious metals need to be compounded with other materials. Among t...

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Problems solved by technology

[0003] Aiming at the above-mentioned technical problems existing in catalysts in the prior art, the present invention provides a method for preparing noble metal nanoparticles supported by heterogeneous structure materials of black phosphorus titanium dioxide. The new black phosphorus titanium dioxide heterostructure materials support noble metal nanoparticles The preparation method should solve the technical problems of low catalytic activity and high price of direct alcohol fuel cell catalysts in the prior art

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