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Preparation method of carbon-supported porous hollow platinum-iridium alloy nano particle catalyst

A technology of alloy nanoparticles and platinum-iridium alloys, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as the preparation method of porous hollow platinum-iridium alloy nano-catalysts, and achieve enhanced synergistic catalysis and lattice distortion effects, The effect of improving catalytic performance and increasing catalytic area

Active Publication Date: 2018-11-02
深圳仁旺科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It should be pointed out that although there are abundant ammonia resources that are safe, reliable and convenient to use, the catalytic preparation technology of PtIr / C ammonia fuel cell with high efficiency and good stability is feasible, and the preparation of porous hollow structure low-platinum nanocatalysts has also been realized. In theory, Porous hollow platinum-iridium alloy nanocatalysts with obvious advantages in the electrocatalytic oxidation of ammonia, however, as far as we know, there is no preparation method for porous hollow platinum-iridium alloy nanocatalysts

Method used

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  • Preparation method of carbon-supported porous hollow platinum-iridium alloy nano particle catalyst

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Embodiment 1

[0038] (1) Preparation of Au@PtIr alloy nanoparticles colloidal solution

[0039] a) 1 volume part of 2.0×10 -4 mol / L of HAuCl 4 aqueous solution, 10 parts by volume of 0.05 mol / L polyethylene glycol aqueous solution (PEG-400), and 20 parts by volume of 0.5 mol / L acetone aqueous solution were mixed, and poured into a quartz bottle to obtain a mixed solution;

[0040] with HAuCl 4 The aqueous solution is the precursor liquid, polyethylene glycol is the dispersant, and acetone is the reducing agent;

[0041] b) Place the mixed solution in the quartz bottle under ultraviolet light and irradiate it for 2 to 25 minutes; the wavelength of the ultraviolet light is 300nm;

[0042] Under ultraviolet light, acetone is induced to produce reductive hydroxyl radicals, which can reduce Au 3+ to the 0 valence state, and then form gold nanoparticles;

[0043] c) Add 0.25 parts by volume of 2.0×10 -4 mol / L H2PtCl6 aqueous solution and 0.5 parts by volume 2.0×10 -4 mol / L of H 2 IrCl 6 ...

Embodiment 2

[0058] a) 1 volume part of 2.0×10 -4 mol / L of HAuCl 4 aqueous solution, 1 volume part of 0.05mol / L polyethylene glycol aqueous solution (PEG-400), and 1 volume part of 0.5mol / L acetone aqueous solution were mixed, and poured into a quartz bottle to obtain a mixed solution;

[0059] b) placing the mixed solution in the quartz bottle under ultraviolet light for 20 minutes; the wavelength of the ultraviolet light is 300nm;

[0060] c) Add 0.75 parts by volume of 2.0×10 -4 mol / L H2PtCl6 aqueous solution and 0.25 parts by volume 2.0×10 -4 mol / L of H 2 IrCl 6 aqueous solution mixing;

[0061] d) Add 1 volume part of 0.01mol / L 2,7-dihydroxynaphthalene solution to the quartz bottle, and add aqueous sodium hydroxide solution to adjust the system to alkalinity, and transfer it to a UV light table for 120 minutes of continuous irradiation with ultraviolet light to obtain Au @PtIr alloy nanoparticle colloidal solution; the alkalinity means that the pH value of the system is greater ...

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Abstract

The invention belongs to the technical field of inorganic chemistry, and specifically relates to a preparation method of a carbon-supported porous hollow platinum-iridium alloy nano particle catalyst.The preparation method comprises the working procedures of preparation of an Au@PtIr alloy nano particle colloidal solution, preparation of a modified multiwalled carbon nanotube, loading of Au@PtPdalloy nano particles, hydrogen introduction heat treatment, denucleation and the like. The catalyst prepared in the invention is special in structure, the catalytic area is increased, the concerted catalysis and lattice distortion effects are strengthened, and the catalytic performance is improved.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemistry, and in particular relates to a preparation method of a carbon-supported porous hollow platinum-iridium alloy nanoparticle catalyst. Background technique [0002] The use of ammonia instead of hydrogen to develop fuel cells is a hot spot in current scientific research. It is understood that in 2013 Japan officially started to use ammonia (NH 3 ) for the development of new fuel cells for fuel. This is one of the contents of the project "Energy Carriers in Special Key Technology Areas of Advanced Low-Carbonization Technology Development (ALCA)" promoted by the Ministry of Education, Culture, Sports, Science and Technology and the Japan Science and Technology Agency (JST). Professor Eguchi from the Department of Engineering Research, Graduate School of Kyoto University Haoyi leads, and the goal is to generate electricity with an efficiency of more than 45%. In fact, the development of ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/8803H01M4/92H01M4/926Y02E60/50
Inventor 杨伦权
Owner 深圳仁旺科技有限公司
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