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Preparation of binary alloy nanowire direct alcohol fuel cell catalyst

A binary alloy and fuel cell technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, battery electrode, etc., can solve the problem of alcohol fuel transmission obstruction and nanoscale catalyst metal particle poisoning , High cost of catalyst preparation and other issues

Inactive Publication Date: 2013-02-27
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The object of the present invention is to solve the problems of poisoning of nanoscale catalyst metal particles, hindered transmission of alcohol fuel and high cost of catalyst preparation in the mechanism of performance degradation of existing direct alcohol fuel cell catalysts; and to provide binary alloy nanowires Preparation method of structural direct alcohol fuel cell catalyst

Method used

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  • Preparation of binary alloy nanowire direct alcohol fuel cell catalyst
  • Preparation of binary alloy nanowire direct alcohol fuel cell catalyst

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specific Embodiment approach 1

[0007] Specific embodiment one: the preparation method of binary alloy nanowire structure direct alcohol fuel cell catalyst in the present embodiment is to realize according to the following steps: one, cationic surfactant and carrier are dissolved in polyhydric alcohol and polar solvent, ultrasonic Mechanical stirring after treatment to obtain a uniform mixture, the concentration of the anionic surfactant in the mixture is 0.5 to 3 times the critical micelle concentration, the carrier is XC-72 carbon black, carbon nanotubes, graphene, mesoporous carbon or carbon fiber, the cationic surfactants include dodecyl dimethyl tertiary amine acetate, cetyl trimethyl ammonium bromide, heterocyclics such as imidazoline, morpholine guanidine, triazine One of derivatives; 2. Add metal precursor salts and complexes to the above mixture sequentially according to 20% to 60% of the total loading of metal elements in metal precursor salts and complexes to form a mixed slurry, wherein The metal...

specific Embodiment approach 2

[0009] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the polyhydric alcohol described in step one is ethylene glycol, propylene glycol, glycerol, 1,3-butanediol or pentaerythritol; the polar solvent is benzene, Toluene, xylene, carbon disulfide, ether, chloroform. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Embodiment 3: This embodiment differs from Embodiments 1 to 3 in that the atomic ratio of the metal precursor salt and the metal element in the complex in step 2 is 1:1. Other steps and parameters are the same as those in the first to third specific embodiments.

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Abstract

The invention discloses a preparation method of a binary alloy-supported nanowire direct alcohol fuel cell catalyst, relating to a preparation method of a high-stability direct alcohol fuel cell catalyst, solving the problems of poisoning of nano catalyst metal particle, blocked transport of alcohol fuels and high preparation cost in existing direct alcohol fuel cell catalysts. The method disclosed herein is characterized by: using a surfactant as a template and forming a bi-continuous micelle in solvents with different polarities, according to different charges charged on the surfactant and a metal precursor salt, forming the nanowire-supported binary alloy catalyst with different adsorption layers by static self-assembly. According to the invention, the prepared catalyst is beneficial for alcohol fuel transport, and has the advantages of low cost, strong toxicity resistance, high activity, and high stability.

Description

technical field [0001] The invention relates to a preparation method of a highly stable direct alcohol fuel cell catalyst. Background technique [0002] Direct alcohol fuel cells (DAFCs) have been widely studied due to their outstanding advantages such as high energy density, environmental friendliness, and portability. However, in the mechanism of catalyst stability decay in the current direct alcohol fuel cell, there are problems such as poisoning of Pt particles of nanoscale catalysts, obstruction of alcohol fuel transmission and high cost of catalyst preparation; taking methanol fuel as an example, methanol oxidation begins with methanol dehydrogenation start, generating CH 2 A series of intermediate products such as OH, and then further oxidized to produce formic acid and adsorbed CO ads These poisoning species will occupy the active sites of Pt (poisoning them) and hinder the adsorption and oxidation of methanol; in addition, the migration, agglomeration or dissoluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44H01M4/92
CPCY02E60/50
Inventor 初园园曹俊
Owner TIANJIN POLYTECHNIC UNIV
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