A kind of proton exchange membrane fuel cell electrocatalyst and preparation method thereof

A technology of proton exchange membrane and electrocatalyst, which is applied in the direction of battery electrodes, catalyst carriers, chemical instruments and methods, etc., can solve the problems of not being able to meet large-scale commercial applications, low stability, high activity, etc., and achieve energy saving, particle size Good uniformity and dispersion

Active Publication Date: 2017-02-15
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, the high cost, high activity, and low stability of Pt cannot meet the needs of large-scale commercial applications.

Method used

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  • A kind of proton exchange membrane fuel cell electrocatalyst and preparation method thereof
  • A kind of proton exchange membrane fuel cell electrocatalyst and preparation method thereof
  • A kind of proton exchange membrane fuel cell electrocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1) Add 4.5mg of KBr powder and 8.4mg of KCl powder into 4.0ml of 10mM CTAC aqueous solution with stirring at room temperature until completely dissolved;

[0054] 2) Add 7.5ml of 5.0mM K2PdCl4 aqueous solution to 1), keep stirring and raise the temperature to 80°C;

[0055] 3) Add 0.75ml of 50mM ascorbic acid aqueous solution, the reduction reaction starts, control the reaction time to 3h, and obtain the second metal nano-seed that exists stably in the form of colloid;

[0056] 4) At room temperature, add 22.5ml of 5mM H2PtCl6Pt aqueous solution to the colloidal solution of the second metal nano-seed, heat up to 100°C under continuous stirring and reflux, and start the replacement reaction, and react for 24 hours to cool down to room temperature to obtain a porous, hollow wall. Colloidal solution of Pt3Pd nanoseeds.

[0057] 5) Loading and sedimentation of platinum-based catalyst nanoparticles

[0058] A Add 40mg of KB-300 purified by 0.5M HCl, 60°C, and 3h to the col...

Embodiment 2

[0067] 1) Add 2.0mg of NaBr powder and 11mg of NaCl powder into 9.4ml of 20mM PVP aqueous solution with stirring at room temperature until completely dissolved;

[0068] 2) Add 7.5ml of 5.0mM Cu(NO3)2 aqueous solution to 1), keep stirring and control the reaction temperature to 25°C;

[0069] 3) Add 0.75ml of 50mM oxalic acid aqueous solution, the reduction reaction starts, control the reaction time to 3h, and obtain the second metal nano-seed that exists stably in the form of colloid;

[0070] 4) At room temperature, add 22.5ml of 10mM K2PtCl4 aqueous solution to the colloidal solution of the second metal nano-seed, keep stirring and control the temperature of the reaction system at 25°C, start the displacement reaction, react for 20h, and obtain porous wall, hollow Pt3Pd nano Colloidal solution of seeds.

[0071] 5) Loading and sedimentation of platinum-based catalyst nanoparticles

[0072] A Add 395mg of Vulcan XC-72 purified by 0.5M HNO3, 80°C, and 5h to the colloidal so...

Embodiment 3

[0077] 1) Add 41mg of CTAB powder and 18mg of CTAC solid into 5.6ml of 20mM SDBS aqueous solution with stirring at room temperature until completely dissolved;

[0078] 2) Add 7.5ml of 5.0mM NiCl2 aqueous solution to 1), keep stirring and raise the temperature to 40°C;

[0079] 3) Add 0.6ml of 50mM ascorbic acid aqueous solution, the reduction reaction starts, control the reaction time to 2h, and obtain Ni nano-seeds that exist stably in the form of colloids;

[0080] 4) At room temperature, add 25ml of 3mM PtCl4 aqueous solution to the colloidal solution of Ni nano seeds, keep stirring and control the temperature of the reaction system to 40°C, start the replacement reaction, and react for 5h to room temperature to obtain porous, hollow Pt2Ni nanoparticles. Colloidal solution of seeds.

[0081] 5) Loading and sedimentation of platinum-based catalyst nanoparticles

[0082] A Add 34 mg of BP2000 purified by 0.5M HCl, 60 °C, and 8 h to the colloidal solution of PtNI nano-seeds...

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Abstract

The invention relates to an electrocatalyst for a proton exchange membrane fuel cell, which is a catalyst that carries a hollow spherical binary platinum-based alloy on a carbon carrier, and the wall of the hollow sphere has holes through the wall; the nano-particles of the binary platinum-based alloy PtxMy The atomic ratio of x and y distribution is: x:y=10:1~1:1, the mass content of Pt in the supported catalyst is 10~40%; the second metal M is Pd, Fe, Ni or Cu. Compared with the prior art, the platinum-based alloy catalyst nanoparticles prepared by the present invention have good dispersion and uniform particle size; the structure and shape of the catalyst can be controlled by using a complexing agent and an etchant; the preparation method of the electrocatalyst is simple and reliable. Good controllability, aqueous phase reaction system and mild preparation conditions make this method not only save energy, but also reduce manufacturing cost, and it is easy to realize large-scale industrial application.

Description

technical field [0001] The invention relates to a fuel cell, in particular to an electrocatalyst for a proton exchange membrane fuel cell and a preparation method thereof. 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 electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44B01J23/89B01J32/00B01J35/10H01M4/92
CPCY02E60/50
Inventor 邱艳玲张华民钟和香毛景霞
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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