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Preparation method of electrocatalyst of proton exchange membrane fuel cell

A proton exchange membrane and fuel cell technology, applied in battery electrodes, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of strict preparation process requirements, difficult to achieve large-scale, cumbersome preparation process, etc., to achieve controllable Good performance, easy large-scale industrial application, and simple preparation method

Active Publication Date: 2015-06-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this electrochemical deposition method has strict requirements on the preparation process, the preparation process is cumbersome, and it is difficult to achieve large-scale

Method used

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  • Preparation method of electrocatalyst of proton exchange membrane fuel cell
  • Preparation method of electrocatalyst of proton exchange membrane fuel cell
  • Preparation method of electrocatalyst of proton exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] 1) Under the condition of stirring at room temperature, 223mg Cu(NO 3 ) 2 ·3H 2 O (M: 241.6) is evenly dissolved in 23ml propylene glycol;

[0066] 2) Under the condition of stirring at room temperature, add 7.5ml trisodium citrate (SC) propylene glycol solution to 1), the concentration of the solution is 0.04gSC / ml;

[0067] 3) Pass high-purity Ar into 2 for more than 30 minutes, and the flow rate of Ar is 60ml min -1 ;

[0068] 4) Dissolve 31.5mg sodium borohydride in 3ml deionized water;

[0069] 5) Slowly add the aqueous solution in 4) to 3) at room temperature and high argon atmosphere, and the dropping rate is controlled at 0.15ml s -1 , the reduction reaction starts immediately, and after the reaction is carried out for 2h, Cu nano-seeds stable in colloidal form are obtained, and its concentration is 27.5mM;

[0070] 6) During the reaction in 5), prepare 15mM H 2 PtCl 6 aqueous solution and 10mM HAuCl 4 aqueous solution.

[0071] Pipette 3.3ml of 15mM H...

Embodiment 2

[0088] 1) Under the condition of stirring at room temperature, 230mg Co(CH 3 COO) 2 4H 2 O (M: 249.1) was uniformly dissolved in 92ml of ethylene glycol;

[0089] 2) Under the condition of stirring at room temperature, add 8.6ml EDTA disodium (M: 372.2) ethylene glycol solution to 1), the solution concentration is 0.02g EDTA disodium / ml.

[0090] 3) Pass high-purity N into 2 2 More than 40min, N 2 The flow rate is 100ml min -1 .

[0091] 4) Dissolve 100mg potassium borohydride in 3ml deionized water;

[0092] 5) At room temperature, high N 2 Under the atmosphere, slowly add the aqueous solution in 4) to 3) dropwise, and the dropping rate is controlled at 0.3ml s -1 , the reduction reaction started immediately, and after the reaction was carried out for 3h, the stable Co nanoseeds in the form of colloids were obtained, and the concentration was 8.4mM.

[0093] 6) During the reaction in 5), prepare 5mM as K 2 PtCl 4 aqueous solution and 2mM KAuCl 4 aqueous solution. ...

Embodiment 3

[0102] 1) Under the condition of stirring at room temperature, 0.328g NiCl 2 ·6H 2 O (M: 327.5, 1mmol) was uniformly dissolved in 14.3ml glycerol (70mM);

[0103] 2) Under the condition of stirring at room temperature, add 60ml of CTAC (M:320) glycerol solution to 1), the concentration of this solution is 50mM.

[0104] 3) Pass high-purity He into 2 for more than 40 minutes, and the flow rate of He is 10ml min -1 .

[0105] 4) Slowly add 22 μL of 37% formaldehyde solution to 3) at room temperature and in a high He atmosphere, and the dropping rate is controlled at 0.01ml s -1 , the reduction reaction started immediately, and after the reaction was carried out for 5h, the stable Ni nanoseeds in the form of colloid were obtained, and the concentration was 13.4mM.

[0106] 5) During the reaction in 4), prepare 30mM PtCl 4 aqueous solution and 5mMAuCl 3 aqueous solution.

[0107] 6) Draw 6.7ml, 30mM as PtCl 4 aqueous solution and 268μL, 5mMKAuCl 4 Aqueous solution, after ...

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Abstract

The invention relates to a preparation method of an electrocatalyst of a proton exchange membrane fuel cell, a core-shell-like structural PtxAuyMz nano seed colloid solution is prepared, PtxAuyMz is supported on the carbon carrier surface, and the catalyst is obtained by centrifugal filtration, washing and drying, distribution of x, y and z of PtxAuyMz nanoparticles is that: x:y:z =1:0.001-0.01:5-30, and the Pt loading amount is 10-40%; the catalyst surface atomic rearrangement is performed by the final heat treatment process; compared with the prior art, the catalyst nanoparticles prepared by the method are well dispersed, and have obvious Pt and Au enrichment characteristics, Pt surface enrichment helps to improve utilization ratio of Pt atoms so as to improve the precious metal mass ratio activity of the catalyst, and Au surface enrichment is conducive to the realization of surface modification and improvement of the electrochemical stability of the nanoparticles.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a method for preparing an electrocatalyst for a proton exchange membrane fuel cell. Background technique [0002] A fuel cell is an energy conversion device that directly converts the chemical energy of fuel and oxidant into electrical energy. Among them, the proton exchange membrane fuel cell (Proton Exchange Membrane Fuel Cell, PEMFC) uses pure hydrogen or purified reformed gas as the fuel, and the perfluorosulfonic acid membrane as the electrolyte. It has broad application prospects in the fields of stationary power stations, electric vehicles, and portable power supplies. It is considered to be the most practical type of fuel cell at present, and has been highly valued by governments and scientific research institutions around the world. [0003] At present, the cathodic oxygen reduction (ORR) catalysts that can be applied to PEMFCs, Pt-based catalysts are still the most ideal electrocatalysts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J23/89H01M4/92B82Y30/00
CPCY02E60/50
Inventor 邱艳玲张华民许壮钟和香毛景霞邓呈维柳丝丝
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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