Alloy nanocage catalyst and preparation method and application thereof

A technology of alloy nanometers and catalysts, which is applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of unfavorable electronic structure methanol oxidation catalytic performance, the overall structure of the catalyst has not been improved, and the difficulty of forming hollow cubes, etc., to shorten the material transmission distance , improve stability and electrocatalytic performance, reduce the effect of dosage

Inactive Publication Date: 2018-12-04
SHENZHEN INST OF ADVANCED TECH
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  • Abstract
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Problems solved by technology

Although the catalyst is composed of gold-nickel alloy, the overall structure of the catalyst has not been improved, and the hollow structure is difficult to control, which is not conducive to the optimization of the electronic structure and the improvement of the catalytic performance of methanol oxidation.
CN 108003355 A discloses a method for synthesizing hollow cubic PtCu nano-frame materials by a one-pot co-reduction solvothermal method, throug...

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  • Alloy nanocage catalyst and preparation method and application thereof

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preparation example Construction

[0064] Its preparation method comprises the following steps:

[0065] (1) Mixing the cuprous oxide dispersion with the noble metal precursor to react to obtain an alloy product;

[0066] (2) Etching unreacted cuprous oxide in the alloy product obtained in step (1) to obtain an alloy nanocage catalyst.

Embodiment 1

[0069] The present embodiment provides a kind of preparation method of cuprous oxide, described method comprises the following steps:

[0070] (1) 0.35g copper sulfate, 1.25g potassium sodium tartrate and 0.225g potassium hydroxide are respectively added in water to obtain a mixed solution;

[0071] (2) Add 4.8 mg of palladium chloride and 0.450 g of glucose to the mixed solution obtained in step (a), stir evenly, react in a water bath at 75°C for 2.5 hours, and after centrifugal washing and drying, obtain an oxide compound with a corner-etched structure. Copper.

Embodiment 2

[0073] The present embodiment provides a kind of preparation method of cuprous oxide, described method comprises the following steps:

[0074] (1) 0.30g cupric chloride, 1.25g potassium sodium tartrate and 0.161g sodium hydroxide are added in water respectively, obtain mixed liquor;

[0075] (2) Add 6.0 mg of palladium chloride and 0.5 g of glucose to the mixed solution obtained in step (a), stir evenly, react in a water bath at 50°C for 4 hours, centrifuge, wash and dry, and obtain oxynitride with a corner-etched structure. copper.

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Abstract

The invention provides an alloy nanocage catalyst and a preparation method and application thereof. The catalyst contains an alloy of noble metal and non-noble metal. The catalyst is shaped as a flower-like hollow nanocage structure. According to the catalyst, non-noble metal partially replaces noble metal to form the alloy, the two metals have synergistic effect, the electronic structure is optimized, and catalyst stability is enhanced. The catalyst has an octahedron angle etched hollow structure. The structure is stable, and specific surface area is large. Meanwhile, application amount of noble metal is low, and catalyst cost is low. The catalyst is applied to direct methanol fuel cells, and catalytic activity for methanol oxidation can reach 800 A/g and above.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to an alloy nanocage catalyst as well as its preparation method and application. Background technique [0002] The energy problem is one of the major problems in today's society. With the increasing shortage of fossil energy, it is urgent to develop renewable energy and realize the effective use of energy. As a new energy efficient utilization technology, fuel cell can also be used as an important energy storage material due to its light weight and high energy density. Methanol is a clean and renewable energy source that is often used in the field of fuel cells. Due to its high energy density, high energy conversion rate, and simple operating system, direct methanol fuel cells have attracted widespread attention. There are two main reactions in the direct methanol fuel cell, that is, the oxygen reduction reaction and the methanol oxidation reaction, and the methanol oxidation reac...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/88H01M4/9041Y02E60/50
Inventor 符显珠陈珍孙蓉
Owner SHENZHEN INST OF ADVANCED TECH
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