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A kind of preparation method of carbon-supported porous hollow platinum-iridium alloy nanoparticle catalyst

A technology of alloy nanoparticles and platinum-iridium alloys, applied in structural parts, electrical components, battery electrodes, etc., can solve problems such as the preparation method of porous hollow platinum-iridium alloy nanocatalysts, and achieve enhanced synergistic catalysis and lattice distortion effects , reduce costs, improve the effect of catalytic performance

Active Publication Date: 2021-04-06
深圳仁旺科技有限公司
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  • Summary
  • 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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  • A kind of preparation method of carbon-supported porous hollow platinum-iridium alloy nanoparticle catalyst
  • A kind of preparation method of carbon-supported porous hollow platinum-iridium alloy nanoparticle catalyst

Examples

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Embodiment 1

[0038](1) Preparation of Au @ ptir alloy nanoparticle colloid solution

[0039]a) 1 volume of 2.0 × 10-4Mol / L of Haucl4Aqueous solution, 10 volumes of 0.05 mol / L of polyethylene glycol (PEG-400), 20 volumes of 0.5 mol / L of aqueous acetone aqueous solution, poured into the quartz bottle to obtain a mixture;

[0040]Haucl4The aqueous solution is a precursor, and polyethylene glycol is a dispersant, acetone is a reducing agent;

[0041]b) Place the mixture in the quartz bottle in ultraviolet photoloration for 2 to 25 minutes; the ultraviolet wavelength is 300 nm;

[0042]Ultra-absorbing, threatened acetone produces a reducing hydroxyl radical, reducing Au3+To 0 valence, thereby forming nano-gold particles;

[0043]c) 0.25 volumes of 0.25 parts by volume of 2.0 × 10 in quartz flask-4Mol / L H2PTCL6 aqueous solution with 0.5 volume of 2.0 × 10-4Mol / L of H2IRCL6Aqueous solution mix;

[0044]d) Quartz bottle was added 0.1-20 bonnet 0.01 mol / L of 2,7-dihydroxyornedaphthalene solution, and the aqueo...

Embodiment 2

[0058]a) 1 volume of 2.0 × 10-4Mol / L of Haucl4Aqueous solution, 1 volume of 0.05 mol / L of polyethylene glycol (PEG-400), 1 volume of 0.5 mol / L of acetone aqueous solution, poured into the quartz bottle to obtain a mixture;

[0059]b) Place the mixture in the quartz bottle to irradiate under ultraviolet light; the ultraviolet wavelength is 300 nm;

[0060]c) 0.75 volumes of 0.0 × 10 in quartz bottle-4Mol / L of H2PTCL6 aqueous solution with 0.25 volume of 2.0 × 10-4Mol / L of H2IRCL6Aqueous solution mix;

[0061]d) 1 volume of 0.01 mol / L of 2,7-dihydroxylnaphthalene solution is added to the quartz bottle, and the aqueous sodium hydroxide is added to the albumin, transferred to the ultraviolet light on the ultraviolet light for 120 minutes to obtain Au @Ptir alloy nanoparticle colloid solution; the albumin means that the pH of the system is greater than 7; the wavelength of the ultraviolet light is 254 nm;

[0062](2) Modified multi-walled carbon nanotubes

[0063]The multi-wall carbon nanot...

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Abstract

The invention belongs to the technical field of inorganic chemistry, and specifically relates to a method for preparing a carbon-supported porous hollow platinum-iridium alloy nanoparticle catalyst, including the preparation of Au@PtIr alloy nanoparticle colloidal solution, the preparation of modified multi-walled carbon nanotubes, and the preparation of Au@PtIr alloy nanoparticles. PtPd alloy nanoparticles, hydrogen heat treatment, nucleation and other processes. The catalyst prepared by the invention has a special structure, increases the catalytic area, enhances the effect of synergistic catalysis and crystal lattice distortion, and improves the catalytic performance.

Description

Technical field[0001]The present invention belongs to the field of inorganic chemistry, and more particularly to a method of preparing a carbon porous hollow platinum rhodium alloy nanoparticle catalyst.Background technique[0002]Ammonia hydrogen to develop fuel cells is a hot spot for current research. It is understood that Japan officially launched in 2013 with ammonia (NH3The development of new fuel cells for fuel. This is one of the "Conditional Low Carbon Technology Development (ALCA) Special Key Technology Executive Executive Executive Research Institute of Scientific and Technological Revitalization Agency (JST), and teaches the Yangtze River Hao Mi, the goal is that the power generation efficiency exceeds 45%. In fact, the development of ammonia fuel batteries can be traced back to 1966. After decades of efforts have achieved some great progress, even ammonia fuel batteries in the University of Ohio State University and Austria Graz. California Zero Emission Pollution Automot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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