Method for preparing Pt/C catalysts for fuel batter with proton exchanging film

A technology of proton exchange membrane and fuel cell, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, catalyst carrier, etc. It can solve the problems of shortening reaction time and long reaction time, and achieve the effect of shortening reaction time

Active Publication Date: 2008-01-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is in order to overcome the too long shortcoming of the reaction time of the preparation method of existing proton exc

Method used

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  • Method for preparing Pt/C catalysts for fuel batter with proton exchanging film
  • Method for preparing Pt/C catalysts for fuel batter with proton exchanging film

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preparation example Construction

[0026] According to the preparation method of the Pt / C catalyst provided by the present invention, the preparation process of the suspension includes mixing carbon black, a protective agent, a platinum compound and a solvent.

[0027] Preferably, the preparation process of the suspension comprises the following steps:

[0028] (1) Mix the protective agent with the solvent;

[0029] (2) Disperse the carbon carrier in the mixture of protective agent and solvent;

[0030] (3) adding the platinum compound into the solvent obtained in step (2) in which the carbon carrier is dispersed, so that the carbon carrier absorbs the platinum compound.

[0031] Wherein, the solvent may be water, alcohol solvent or a mixture thereof. Alcohol solvent can be existing various alcohol solvents, is preferably the monohydric alcohol of 2-6 carbon number, dibasic alcohol or polyhydric alcohol, more preferably ethanol, propanol, isopropanol, n-butanol, isobutanol One or more of alcohol, ethylene gl...

Embodiment 1

[0043] This example is used to illustrate the preparation of the catalyst provided by the present invention.

[0044] First grind the VXC-72 activated carbon for 1 hour, then place the carbon black in a muffle furnace and sinter at 200°C for 4 hours under an inert gas atmosphere, then grind for 1 hour, and pass through a 800-mesh sieve.

[0045] Disperse 0.1 g of carbon black powder in 40 mL of isopropanol by ultrasonication at 40 kHz for 5 min, then transfer to a mixture of 20 mL of ethylene glycol and 0.1 g of tartaric acid at 120 rpm Stir for 4 hours.

[0046]Add the aqueous solution of chloroplatinic acid with a concentration of 0.005 mol / L to the ethylene glycol in which carbon black is dispersed, and continue stirring for 5 hours while controlling the reaction pH to 7 so that the carbon black can fully absorb chloroplatinic acid to obtain a suspension. Wherein, the consumption of the chloroplatinic acid aqueous solution is such that the weight ratio of platinum containe...

Embodiment 2

[0050] This example is used to illustrate the preparation of the catalyst provided by the present invention.

[0051] First grind the VXC-72 activated carbon for 3 hours, then place the carbon black in a muffle furnace and sinter at 700°C for 5 hours under an inert gas atmosphere, then grind for 3 hours, and pass through a 800-mesh sieve.

[0052] By ultrasonication at 50 kHz for 30 min, 0.12 g of carbon black powder was dispersed in 40 mL of isopropanol, then transferred to a mixture of 25 mL of ethylene glycol, 0.1 g of tartaric acid, and 0.1 g of malic acid, and dissolved at 100 Stirring was continued at a speed of rpm for 1 hour.

[0053] Add the aqueous solution of chloroplatinic acid with a concentration of 0.02 mol / L to the ethylene glycol in which carbon black is dispersed, and continue stirring for 3 hours while controlling the reaction pH to 8 so that the carbon black can fully absorb chloroplatinic acid to obtain a suspension. Wherein, the consumption of the chloro...

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Abstract

The invention relates to a preparation method for Pt/C catalyst used in proton exchange membrane fuel cell, comprising contacting reducing agent with a suspension liquid. The suspension liquid comprises protective agent and carbon carrier adsorbing platinum compound, wherein said protective agent is one of tartaric acid, malic acid and dextrose or several kinds. In the preparation method provided by the invention, one of tartaric acid, malic acid and dextrose or several kinds are used as protective agent. In this way, nanometer grain of catalyst is formed easily while reaction time is shortened greatly.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, more particularly to a preparation method of a Pt / C catalyst for a proton exchange membrane fuel cell. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC) is a reaction device that directly converts the chemical energy of fuel and oxidizing gas into electrical energy through electrochemical reaction. It has the advantages of low working temperature, high energy conversion efficiency, simple structure, low noise, abundant fuel sources, and no environmental pollution. power supply. Proton exchange membrane fuel cells have attracted great attention from all over the world. As the key material of proton exchange membrane fuel cells, Pt / C catalyst has always been a hot spot in the research of proton exchange membrane fuel cells. [0003] At present, Pt / C catalyst is a more practical catalyst for proton exchange membrane fuel cells. However, how to further improve the catalyt...

Claims

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Application Information

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IPC IPC(8): B01J37/00B01J23/42B01J32/00H01M4/88H01M4/92
CPCY02E60/50
Inventor 张日清
Owner BYD CO LTD
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