A kind of silver-copper nano-alloy electrocatalyst and its laser vapor deposition method

Abstract

The invention discloses a silver copper nano alloy electro-catalyst and a laser gas phase deposition method thereof. The silver copper nano alloy electro-catalyst is obtained by depositing on a titanium sheet via a laser gas phase deposition method by taking the titanium sheet as a substrate and taking silver copper alloy as a target. The mole ratio of silver to copper in the silver copper nano alloy electro-catalyst is 4 to 1; the structure morphology of the silver copper nano alloy electro-catalyst is nanocrystalline and non-crystalline, and the nanocrystalline is embedded into the non-crystalline; or the structure morphology of the silver copper nano alloy electro-catalyst consists of nanocrystalline or multi-crystalline, wherein the nanocrystalline is a solid solution of a silver and copper face-centered cubic structure, the non-crystalline is metal copper, and the multi-crystalline is multi-crystalline copper. According to the silver copper nano alloy electro-catalyst and the laser gas phase deposition method, the oxygen reduction reaction catalytic effect is superior, and the preparation cost is low.

Description

technical field [0001] The invention belongs to the field of rechargeable metal-air batteries and renewable fuel batteries, in particular to an electrocatalyst for oxygen reduction reaction used on oxygen electrodes and air electrodes in the batteries and a preparation method thereof. Background technique [0002] Metal-air batteries and fuel cells can convert chemical energy into electrical energy. In these batteries, metals or fuels are oxidized at the anode to produce electrons, and oxygen or fuel is reduced at the cathode to produce hydroxide ions or water. The cathode Catalytic efficiency is the most critical part affecting the performance of metal-air batteries and fuel cells. [0003] At present, the cathode catalyst mainly uses carbon-supported platinum as the catalyst, and the noble metal platinum as the electrochemical agent has a good catalytic effect, but metal platinum is expensive and resources are scarce, which is the fundamental reason restricting the commerc...

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the shortcomings of the silver alloy electrocatalysts in the prior art that are expensive, the preparation process is complicated, the prepared alloy metal phase is separated, and there is no nanonization so that the catalytic activity is low, the present invention proposes a silver-copper nano-alloy electrocatalyst and its Laser Vapor Deposition Method

Images