Preparation method of fuel cell catalyst

A fuel cell and catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of reducing the amount of Pt used, and achieve the effects of uniform catalyst, saving reaction time, and good bulk density

Pending Publication Date: 2019-11-12
先进储能材料国家工程研究中心有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Platinum-based catalysts are the main components of fuel cells today and in the next ten years, but due to the rarity in earth resources and the lack of alternative new catalysts, it is necessary to reduce the use of Pt, improve the utilization rate of platinum and Prolonging the service life of platinum-based catalysts has become a hot spot in the research of fuel cell catalysts

Method used

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  • Preparation method of fuel cell catalyst
  • Preparation method of fuel cell catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A preparation method of fuel cell catalyst, carried out according to the following steps:

[0027] Ⅰ The amount of carbon carrier is calculated based on 3g of carbon carrier contained in 1L of ethylene glycol and deionized water mixture. The carbon carrier uses Vulcan XC-72 carbon black, and the amount of platinum source is based on the mixture of 1L of ethylene glycol and deionized water. The solution contains 2g of platinum element. The platinum source is ethylene glycol solution of chloroplatinic acid hexahydrate. The volume ratio of ethylene glycol and deionized water in the mixture of ethylene glycol and deionized water is 1:1. Add the carbon carrier to the mixture of ethylene glycol and deionized water for ultrasonic dispersion for 30 minutes, then add the platinum source to the mixture of ethylene glycol and deionized water in which the carbon carrier has been dispersed, and stir for 30 minutes to form a mixed slurry. Add the ethylene glycol solution of potassium...

Embodiment 2

[0035] A method for preparing a fuel cell catalyst, the steps of which are basically the same as those of the method for preparing a fuel cell catalyst in Example 1, except that:

[0036] 1. In step Ⅰ, the amount of carbon carrier is calculated based on 2g of carbon carrier contained in 1L of ethylene glycol and deionized water mixture. The carbon carrier is Ketjen Black ECP600JD. The water mixture contains 3g of platinum element, the platinum source is platinum acetylacetonate solution, the volume ratio of ethylene glycol to deionized water in the mixture of ethylene glycol and deionized water is 1:0.5, and the carbon carrier The ultrasonic dispersion time is controlled to 60 minutes, the stirring time of the platinum source is controlled to 40 minutes, the pH value of the mixed slurry is controlled to 9, and when the pH of the mixed slurry is adjusted to 9, continue to stir for 40 minutes;

[0037] 2. In step II, the time for feeding nitrogen into the mixed slurry is control...

Embodiment 3

[0041] A method for preparing a fuel cell catalyst, the steps of which are basically the same as those of the method for preparing a fuel cell catalyst in Example 1, except that:

[0042] 1. In step Ⅰ, the amount of carbon carrier is calculated based on 4g of carbon carrier contained in 1L of ethylene glycol and deionized water mixture. The carbon carrier is carbon black (Ketjen Black ECP600JD), and the amount of platinum source is based on 1L The mixed solution of alcohol and deionized water contains 1g of platinum element calculation, the platinum source is sodium chloroplatinate hexahydrate solution, and the volume ratio of ethylene glycol and deionized water in the mixed solution of ethylene glycol and deionized water is 1:1.5, the ultrasonic dispersion time of the carbon carrier is controlled to 90 minutes, the stirring time of the platinum source is controlled to 60 minutes, the pH value of the mixed slurry is controlled to 11, and when the pH of the mixed slurry is adjus...

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Abstract

The invention provides a preparation method of a fuel cell catalyst. The method comprises the steps of (I) sequentially adding a carbon support and a platinum source into a mixed solution of ethyleneglycol and deionized water, dispersing evenly to form mixed slurry, and then adding an ethylene glycol solution of potassium hydroxide into the mixed slurry until the pH of the mixed slurry is adjusted to 9-11; (II) introducing nitrogen into the finally obtained mixed slurry until oxygen in the mixed slurry is completely discharged, injecting the mixed slurry into a spray reactor at 120-150 DEG Cfor carrying out spray reaction and cooling a reaction product to room temperature; (III) transferring the reaction product cooled to the room temperature into a positive pressure filter, filtering and purifying the reaction product through a continuous microporous membrane of the deionized water until the total ion concentration of filtrate is reduced to below 10ppm and obtaining catalyst filtrate; and (IV) injecting the catalyst filtrate into a spray dryer for carrying out spray drying and preparing a Pt / C catalyst. The method provided by the invention is simple in process, fast in reactionand high in product purity, and continuous production can be implemented.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a fuel cell catalyst. Background technique [0002] Proton fuel cell is one of the keys to the development of hydrogen energy. It can convert high-energy-density chemical energy contained in hydrogen energy into electrical energy with high efficiency, and its exhaust emissions can achieve zero pollution to the environment. It is the most ideal power source for electric vehicles. [0003] Platinum-based catalysts are the main components of fuel cells today and in the next ten years. However, due to the rarity in earth resources and the lack of alternative new catalysts, it is necessary to reduce the amount of Pt used, improve the utilization rate of platinum and Prolonging the service life of platinum-based catalysts has become a hot spot in the research of fuel cell catalysts. In the prior art, the preparation methods of platinum-based catalysts are b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92
CPCH01M4/926Y02E60/50
Inventor 钟发平戴超华符长平王玲
Owner 先进储能材料国家工程研究中心有限责任公司
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