Preparing method of supported type gold-platinum alloy nanocluster material

Abstract

The invention relates to a preparing method of a supported type gold-platinum alloy nanocluster material. The method comprises the following steps of supplying power for a platinum metal electrode and a gold metal electrode immersed in a carbon-containing water suspension liquid by a pulse direct current power source to generate plasma discharging; enabling high-energy plasmas between the platinum metal electrode and the gold metal electrode to continuously sputter and attack the surfaces of the platinum metal electrode and the gold metal electrode, so as to enable metal ions or ion clusters to leave off the surfaces of the electrodes; and carrying out free diffusion, growth, dispersion and water medium quenching on the metal ions or the ion clusters, so as to form the carbon-supported type gold-platinum alloy nanocluster material. The crystallinity of the gold-platinum alloy nanocluster is high, and the particle size is about 2nm. The method has the advantages that the method is applied in a normal-temperature and normal-pressure opening system, the requirement of experiment equipment is simple, the preparation of the nanocluster material and the dispersion on a carrier are simultaneously completed, the dispersivity of the nanocluster material on the carrier is good, and the batched and controllable production can be realized.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials, and in particular relates to a preparation method of a supported gold-platinum alloy nanocluster material. Background technique [0002] Due to their unique electronic structure and significant specific surface area, nanoalloys, especially platinum-containing nanoalloys, have attracted extensive attention from researchers in recent years. The research results show that gold-platinum alloy nanomaterials have high catalytic activity for oxygen reduction reaction, and have good application prospects as electrocatalysts in various fuel cells and lithium-air batteries. [0003] The structure of nanomaterials, such as particle size, is a key factor affecting the performance of gold-platinum alloy nanomaterials, such as catalytic activity. In 2010, Yang Shaohong's research group at the Massachusetts Institute of Technology found that gold-platinum nanoparticles with an average par...

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Problems solved by technology

The supported catalysts obtained by these methods have defects such as poor dispersion, large particle size and impurities affecting catalytic performance, which are not conducive to the application of materials.

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