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Preparation method and application of novel gas diffusion electrode

A gas diffusion electrode, a new type of technology, applied in the direction of electrodes, electrode shape/type, electrolysis process, etc., can solve the problems of increasing production costs, and achieve the effect of facilitating migration, good conductivity, and avoiding stability problems

Inactive Publication Date: 2018-05-29
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pt is a widely used catalyst, but Pt is a rare metal, which increases the production cost, so researchers are working on cheap and effective catalysts

Method used

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  • Preparation method and application of novel gas diffusion electrode
  • Preparation method and application of novel gas diffusion electrode
  • Preparation method and application of novel gas diffusion electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Cut a stainless steel mesh with a specification of 8cm*8cm*0.1mm and place it in a beaker, add 15ml of 0.05mol / L sodium hydroxide solution and 15ml of 0.05mol / L phosphoric acid solution into the beaker, heat to 90°C and keep it for 20min before use .

[0042] Weigh 25g of graphite powder into a beaker, add 800ml of water, boil and keep boiling for 1h. After cooling, wash with distilled water for later use.

[0043] Weigh 20g of graphite powder, 2g of zirconia and mix evenly, add 20ml of acetone solution, place the beaker in ultrasonic vibration for 10min, so that the graphite, zirconia powder and acetone are evenly mixed. Add 2ml of polytetrafluoroethylene solution and continue shaking for 20min. Place the oscillating beaker in a 70°C water bath to continuously volatilize the acetone to form a paste, which is evenly coated on the treated stainless steel mesh to form a gas diffusion layer, which will cover the gas The stainless steel mesh of the diffusion layer was ca...

Embodiment 2

[0045] Cut a stainless steel mesh with a specification of 8cm*8cm*0.1mm and place it in a beaker, add 15ml of 0.05mol / L sodium hydroxide solution and 15ml of 0.05mol / L phosphoric acid solution into the beaker, heat to 90°C and keep it for 20min before use .

[0046] Weigh 25g of graphite powder into a beaker, add 800ml of water, boil and keep boiling for 1h. After cooling, wash with distilled water for later use.

[0047] Weigh 20g of graphite powder, 4g of zirconia and mix evenly, add 20ml of acetone solution, place the beaker in an ultrasonic wave and vibrate for 10min, so that the graphite, zirconia powder and acetone are evenly mixed. Add 3ml of polytetrafluoroethylene solution and continue shaking for 20min. Place the oscillating beaker in a 90°C water bath to continuously volatilize the acetone to form a paste, which is evenly coated on the treated stainless steel mesh to form a gas diffusion layer, which will cover the gas The stainless steel mesh of the diffusion la...

Embodiment 3

[0049] Cut a stainless steel mesh with a specification of 8cm*8cm*0.1mm and place it in a beaker, add 15ml of 0.05mol / L sodium hydroxide solution and 15ml of 0.05mol / L phosphoric acid solution into the beaker, heat to 90°C and keep it for 20min before use .

[0050] Weigh 25g of graphite powder into a beaker, add 800ml of water, boil and keep boiling for 1h. After cooling, wash with distilled water for later use.

[0051] Weigh 20g of graphite powder, 6g of zirconia and mix evenly, add 20ml of acetone solution, place the beaker in an ultrasonic wave and vibrate for 10min, so that the graphite, zirconia powder and acetone are evenly mixed. Add 3ml of polytetrafluoroethylene solution and continue shaking for 20min. Place the oscillating beaker in an 80°C water bath to continuously volatilize the acetone to form a paste, which is evenly coated on the treated stainless steel mesh to form a gas diffusion layer, which will cover the gas The stainless steel mesh of the diffusion l...

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Abstract

The invention belongs to the technical field of electrochemical oxygen cathode reducing system pulp bleaching, and relates to the technology of hydrogen peroxide generation through electrochemical catalysis oxygen cathode reducing, in particular to a preparation method and application of a novel gas diffusion electrode. The method specifically includes the steps of treating a stainless steel wiremesh, preparing novel graphite / teflon paste and manufacturing the gas diffusion electrode. According to the preparation method and application of the novel gas diffusion electrode, zirconium oxide andgraphite are matched for use, and cost can be greatly reduced; furthermore, the catalytic effect is good, the zirconium oxide has an oxidation-reduction character, oxygen can be supplied in a reducing atmosphere, and oxygen consumption can happen in an oxidizing atmosphere; and moreover, metallic oxide is doped into powdered graphite to manufacture an electrode material, stripping cannot occur easily, and the practical and promotional value is made better.

Description

technical field [0001] The invention belongs to the technical field of pulp bleaching with an electrochemical oxygen cathode reduction system, relates to the technology of electrochemically catalyzing oxygen cathode reduction to produce hydrogen peroxide, and in particular relates to a preparation method and application of a novel gas diffusion electrode. Background technique [0002] At present, my country is a big country of paper consumption, and maintaining mass production of high-quality paper is the primary task of every papermaking enterprise in my country. Pulp bleaching is essential in the paper industry, and studies have found that more than 2.8 billion tons of chemicals are consumed in bleaching annually. Most of the bleaching agents used now are chlorine bleaching agents. Calculated in this way, hundreds of millions of tons of chemical reagents are needed every year, and the discharged wastewater contains many refractory components, which can conceivably pollute...

Claims

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Application Information

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IPC IPC(8): C25B1/30C25B11/03C25B11/06D21C9/16
CPCC25B1/30C25B11/031C25B11/095D21C9/163
Inventor 王守娟夏南南孔凡功侯艳仲亚杰刘忠明
Owner QILU UNIV OF TECH
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