An ultra-low noble metal loading integrated membrane electrode and its preparation method and application

A precious metal, membrane electrode technology, applied in the field of electrochemistry, can solve the problem of high cost of membrane electrodes, and achieve the effects of reducing shedding loss, avoiding peeling, and advanced preparation methods

Active Publication Date: 2022-03-29
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Although the above research has made some progress in reducing the amount of catalyst or improving the binding force between the catalyst layer and the proton exchange membrane, there are few researches that solve the two technical difficulties at the same time. The cost of the membrane electrode is still high, and the activity and durability are still low. to be further improved

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  • An ultra-low noble metal loading integrated membrane electrode and its preparation method and application
  • An ultra-low noble metal loading integrated membrane electrode and its preparation method and application
  • An ultra-low noble metal loading integrated membrane electrode and its preparation method and application

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Effect test

Embodiment 1

[0047] Add 0.5mL 20mmol / L chloroplatinic acid aqueous solution and 1mL 20mmol / L chloroiridic acid aqueous solution into a 10mL glass bottle, add 1.5mL 1mmol / L polyoxypropylene polyoxyethylene copolymer aqueous solution after ultrasonication for 30s, ultrasonication for 30s, and let stand After 30s, add 1.5mL of 9mol / L formic acid, obtain a mixed solution after ultrasonication, add 1mL of the mixed solution on both sides of the reaction device fixed with a 50μm thick Nafion 212 proton exchange membrane, and react at 65°C for 24h, the protons after the reaction The exchange membrane was placed in 5wt% H 2 o 2 In aqueous solution, after treatment at 80°C for 30min, soak in deionized water at 80°C for 30min, then transfer to 0.5mol / L H 2 SO 4 After treatment at 80°C for 30 minutes, soak in deionized water at 80°C for 30 minutes, dry in the air at room temperature for 30 minutes, place on a vacuum adsorption heating platform, and dry flatly at 70°C and 0.1 MPa vacuum for 15 minut...

Embodiment 2

[0054] Add 0.5mL 20mmol / L chloroplatinic acid aqueous solution and 1mL 20mmol / L chloroiridic acid aqueous solution into a 10mL glass bottle, add 1.5mL 1mmol / L polyoxypropylene-polyoxyethylene copolymer aqueous solution after ultrasonication for 30s, ultrasonication for 30s, statically After standing for 30s, add 1.5mL 9mol / L formic acid, obtain a mixed solution after ultrasonication, add 1mL mixed solution on both sides of the reaction device fixed with a 50μm thick Nafion212 proton exchange membrane, and react at 65°C for 24h, the protons after the reaction The exchange membrane was placed in 5wt% H 2 o 2 In aqueous solution, after treatment at 80°C for 30min, soak in deionized water at 80°C for 30min, then transfer to 0.5mol / L H 2 SO 4 After treatment at 80°C for 30 minutes, soak in deionized water at 80°C for 30 minutes, dry in the air at room temperature for 30 minutes, place on a vacuum adsorption heating platform, and dry flatly at 70°C and 0.1 MPa vacuum for 15 minute...

Embodiment 3

[0059] Add 0.5mL 20mmol / L chloroplatinic acid aqueous solution and 1mL deionized water into a 10mL glass bottle, add 1.5mL 1mmol / L polyoxypropylene polyoxyethylene copolymer aqueous solution after ultrasonication for 30s, ultrasonication for 30s, and add 1.5 mL9mol / L formic acid, after ultrasonication to obtain a mixed solution, take 1mL of the mixed solution and add it to one side of the reaction device fixed with a 50μm thick Nafion 212 proton exchange membrane. Add 1mL 20mmol / L chloroiridic acid aqueous solution and 0.5mL deionized water to another 10mL glass bottle, add 1.5mL 20mmol / L polyoxypropylene polyoxyethylene copolymer aqueous solution after ultrasonication for 30s, ultrasonication for 30s, and let stand for 30s Then add 1.5mL of 9mol / L formic acid and obtain a mixed solution after ultrasonication. Take 1mL of the mixed solution and add it to the other side of the reaction device fixed with a 50μm thick Nafion 212 proton exchange membrane. React at 65°C for 24h, an...

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Abstract

The invention relates to an ultra-low noble metal loading integrated membrane electrode, a preparation method and application thereof. The membrane electrode includes a gas diffusion layer, a proton exchange membrane and a catalyst layer grown on the proton exchange membrane, and the catalyst layer is composed of nano-flower metal materials. The metal catalyst layer is grown in situ on the proton exchange membrane, and after treatment, it is hot-pressed with the gas diffusion layer to construct an ultra-low precious metal loading integrated membrane electrode. The membrane electrode constructed by the invention has the advantages of low catalyst consumption, firm combination between the catalyst layer and the proton exchange membrane, excellent electrode performance and the like. The prepared membrane electrode can be used in fuel cells and water electrolysis reaction devices.

Description

technical field [0001] The invention belongs to the field of electrochemistry (membrane electrode preparation technology), and in particular relates to an ultra-low noble metal loading integrated membrane electrode and its preparation method and application. The prepared membrane electrode can be used in fuel cells and water electrolysis reaction devices. Background technique [0002] Membrane electrodes composed of cathode and anode gas diffusion layers, cathode and anode catalyst layers, and sandwiched proton exchange membranes are the core components of proton exchange membrane fuel cell stacks and water electrolysis stacks, and are important factors affecting cost and life. Improving the utilization rate of the catalyst in the catalyst layer and increasing the durability of the membrane electrode is one of the key issues to be solved for the large-scale industrialization of proton exchange membrane fuel cells and water electrolysis cells. [0003] The traditional membra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1004H01M4/92H01M4/88C25B9/23C25B1/04C25B11/032C25B11/052C25B11/089
CPCH01M8/1004H01M4/881H01M4/8825H01M4/926Y02E60/36Y02E60/50
Inventor 宋玉江秦嘉琪韩光旗刘会园
Owner DALIAN UNIV OF TECH
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