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Preparation method of supported binary alloy direct alcohol fuel cell catalyst with porous hollow sphere structure

A binary alloy, fuel cell technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of high catalyst preparation cost and hindered alcohol fuel transmission , Pt particle poisoning of nano-scale catalysts, etc.

Active Publication Date: 2013-06-05
海卓健新能源材料(上海)有限公司
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Problems solved by technology

[0003] The object of the present invention is to solve the problems of nano-scale catalyst Pt particle poisoning, alcohol fuel transmission obstruction and high catalyst preparation cost in the existing direct alcohol fuel cell catalyst performance degradation mechanism; and provide a binary alloy loading Preparation method of direct alcohol fuel cell catalyst with porous hollow sphere structure

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  • Preparation method of supported binary alloy direct alcohol fuel cell catalyst with porous hollow sphere structure
  • Preparation method of supported binary alloy direct alcohol fuel cell catalyst with porous hollow sphere structure
  • Preparation method of supported binary alloy direct alcohol fuel cell catalyst with porous hollow sphere structure

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specific Embodiment approach 1

[0007] Embodiment 1: In this embodiment, the preparation method of binary alloy-supported porous hollow sphere structure direct alcohol fuel cell catalyst is realized according to the following steps: 1. Anionic surfactant and carrier are dissolved in polyhydric alcohol, Mechanical stirring after ultrasonic 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, mesoporous carbon or carbon fiber , the anionic surfactant has stearic acid, oleic acid, lauric acid, sodium lauryl sulfate, sodium lauryl sulfate, sodium dodecylbenzenesulfonate or glycocholic acid; 20% to 60% of the total loading of the metal element in the bulk salt and the complex. Add the metal precursor salt and the complex to the above mixture in sequence to form a mixed slurry, wherein the metal precursor salt is PdCl 2 , PtCl 4 , AuCl 3 , AgNO 3 , IrCl 3 or Rh...

specific Embodiment approach 2

[0009] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the polyhydric alcohol in Step 1 is ethylene glycol, propylene glycol, glycerol, 1,3-butanediol or pentaerythritol. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the concentration of the surfactant in the mixture described in step 1 is 0.5 to 3 times the critical micelle concentration. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a preparation method of supported binary alloy direct alcohol fuel cell catalyst with a porous hollow sphere structure, relating to a preparation method of alcohol fuel cell catalyst. The invention solves the problems of Pt particle poisoning of nano catalyst, restricted transmission of alcohol fuel and high preparation cost of the catalyst which exist in the degradation mechanism of the existing direct alcohol fuel cell catalyst. The method is as follows: taking surface active agent as a template, and forming the supported binary alloy catalyst with the porous hollow sphere structure at different adsorbed layers in the form of electrostatic self-assembly according to the difference of charges of the surface active agent and metal precursor salt. The catalyst prepared by method of the invention is conducive to alcohol fuel transfer, and has the advantages of low cost, strong anti-drug performance of products, high activity and high stability. The products of the invention are mainly used catalyst for methanol fuel cells.

Description

technical field [0001] The invention relates to a preparation method of a direct alcohol fuel cell catalyst. Background technique [0002] Direct alcohol fuel cells (DAFCs) have attracted increasing interest from scientists all over the world due to their high energy density, simple structure, and low operating temperature. However, the existing direct alcohol fuel cell catalyst performance degradation mechanism has the problems of nanoscale catalyst Pt particle poisoning, alcohol fuel transmission obstruction and high catalyst preparation cost; 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), hindering the adsorption and oxidation of methanol. Contents of the invention [0003] The object of the present invention is...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/90B01J23/44B01J23/42B01J23/52B01J23/50
CPCY02E60/50
Inventor 王振波初园园顾大明姜政志尹鸽平左朋建
Owner 海卓健新能源材料(上海)有限公司
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