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Method for recycling catalyzer from membrane electrode

A membrane electrode and catalyst technology, which is applied in the field of recovering catalysts from membrane electrodes, can solve the problems of complex stripping methods and processes, and is not suitable for stripping membrane electrodes, and achieves the effect of simple process.

Active Publication Date: 2008-02-27
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for recovering catalysts from membrane electrodes in order to overcome the disadvantages that the stripping method of the matrix material in the existing catalyst recovery method is complex and unsuitable for stripping the matrix material of the membrane electrode. The stripping method is simple and suitable for stripping the matrix material of the membrane electrode

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example is used to illustrate the method for recovering catalyst from the membrane electrode of the present invention.

[0031] Soak a membrane electrode known to contain 100 mg of platinum in propanol solvent at 40°C for 1 hour (use 10 milliliters of propanol per gram of membrane electrode), the proton exchange membrane in the membrane electrode is completely separated from the catalytic layer, and the proton exchange membrane take out. Then the solvent was poured out, and the remaining solid matter was sintered in air at 400° C. for 5 hours to obtain a solid powder.

[0032] Concentration is that the concentrated nitric acid of 65% and the concentrated hydrochloric acid that concentration is 37% are HNO 3 : The ratio of HCl=1:3 is configured as aqua regia, and the above-mentioned solid powder is added into aqua regia, and the volume-to-weight ratio of aqua regia and solid powder is 25 milliliters / gram. At the same time, aqua regia was heated to 50°C for 7 hours...

Embodiment 2

[0035] This example is used to illustrate the method for recovering catalyst from the membrane electrode of the present invention.

[0036] Soak a membrane electrode known to contain 160 mg of platinum in an ethanol solvent at 20° C. for 10 hours (using 15 milliliters of ethanol per gram of membrane electrode), the proton exchange membrane is completely separated from the catalytic layer, and the proton exchange membrane is taken out. Then the solvent was poured out, and the remaining solid matter was sintered in air at 600° C. for 4 hours to obtain a solid powder.

[0037] Concentration is that the concentrated nitric acid of 65% and the concentrated hydrochloric acid that concentration is 37% are HNO 3 : HCl=1:3 ratio configuration aqua regia, above-mentioned solid powder is added into aqua regia, the volume weight ratio of aqua regia and solid powder is 30 milliliters / gram. At the same time, the aqua regia was heated to 100°C for 1 hour, the solid powder was completely dis...

Embodiment 3

[0040] This example is used to illustrate the method for recovering catalyst from the membrane electrode of the present invention.

[0041] The membrane electrode of the proton exchange membrane fuel cell known to contain 125 milligrams of platinum was immersed in a mixed solvent of propanol and water at 100°C for 15 hours (25 milliliters of propanol and water used per gram of membrane electrode), the protons in the membrane electrode The exchange membrane is completely separated from the catalyst, and the proton exchange membrane is taken out. Then the solvent was poured out, and the remaining solid matter was sintered in air at 1000° C. for 1 hour to obtain a solid powder.

[0042] Concentration is that the concentrated nitric acid of 65% and the concentrated hydrochloric acid that concentration is 37% are HNO 3 : HCl=1:3 ratio configuration aqua regia, above-mentioned solid powder is added into aqua regia, the volume weight ratio of aqua regia and solid powder is 60 millil...

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PUM

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Abstract

The invention discloses a recycling method of catalyst from membrane electrode, which comprises the following steps: contacting the membrane electrode and solvent to swell the base material; stripping base material of membrane electrode; recycling catalyst from membrane electrode with base material stripped; making the base material of membrane electrode as proton exchange film as macromolecular material. The invention can strip membrane electrode form base material completely to recycle, which simplifies the stripping course.

Description

technical field [0001] The present invention relates to a method for recovering a catalyst, more particularly to a method for recovering a catalyst from a membrane electrode. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC for short) is a reaction device that directly converts the chemical energy of fuel and oxidizing gas into electrical energy through electrochemical reaction. PEMFC has the advantages of low operating temperature, high energy conversion efficiency, simple structure, low noise, abundant fuel sources, and no environmental pollution. power supply. [0003] In the structure of PEMFC, its core component is the membrane electrode. The membrane electrode generally includes a proton exchange membrane as a matrix material, a catalytic layer on both surfaces of the proton exchange membrane, and a diffusion layer on the surface of the catalytic layer. The catalytic layer Contains noble metal catalysts for catalytic reactions, such as one or m...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00H01M8/00H01M8/008
CPCY02E60/50
Inventor 张日清王丹董俊卿
Owner BYD CO LTD
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