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Configuration of air diffusion cathode for efficiently producing hydrogen peroxide and preparation method thereof

An air diffusion and hydrogen peroxide technology, applied in the field of environmental engineering, can solve the problems of low oxygen solubility, decreased output and current efficiency, limited application, etc., and achieve the effects of high application value, low price, and high efficiency.

Active Publication Date: 2014-04-02
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the above carbon materials are used as cathodes, they usually have their best H 2 o 2 reduction potential range, otherwise H 2 o 2 The yield and current efficiency will drop rapidly, making its application limited
In addition, the solubility of oxygen in water is low, which often cannot meet the requirements of cathode reduction to produce H. 2 o 2 Requirements, it is often necessary to expose air or oxygen near the cathode

Method used

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  • Configuration of air diffusion cathode for efficiently producing hydrogen peroxide and preparation method thereof
  • Configuration of air diffusion cathode for efficiently producing hydrogen peroxide and preparation method thereof
  • Configuration of air diffusion cathode for efficiently producing hydrogen peroxide and preparation method thereof

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Embodiment Construction

[0015] The present invention is further described in detail through the following embodiments in conjunction with the accompanying drawings.

[0016] (1) The manufacture method of air cathode sheet of the present invention

[0017] 30% polytetrafluoroethylene 0.075ml / cm 2 and 6.75mg / cm 2 Carbon black was mixed and coated on carbon fiber cloth (5×8cm 2 ) on one side, after drying naturally, calcined at 350°C for 30min. In the same way, 0.15ml / cm2 of isopropanol containing 1.5% polytetrafluoroethylene and 8.3% 2 and 4.5mg / cm 2 The mixture of carbon black is coated on the same surface of the calcined and cooled carbon fiber cloth, dried in the air, and calcined at 350°C for 30min.

[0018] (2) The effect obtained by this example

[0019] The example air diffusion cathode structure, such as figure 1 shown. Including inlet and outlet pipes, wires, current collection (nickel mesh), air cathode sheets, etc. put each part according to figure 1 Installed as shown, it is a com...

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Abstract

The invention relates to a configuration of an air diffusion cathode for efficiently producing hydrogen peroxide and a preparation method thereof. The method mainly comprises the following steps: coating a carbon fiber by using a mixed solution of polytetrafluoroethylene and carbon black, so as to prepare an air cathode sheet, and then assembling the air cathode sheet according to a certain configuration. The air diffusion cathode has good H2O2 yield and current efficiency, is low in requirements of air aeration quantity, convenient to run, small in energy consumption, low in price, and stable in property, selects a carbon fiber and a carbon black material, and has high practical application value.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and relates to a configuration and a preparation method of an air diffusion cathode for efficiently producing hydrogen peroxide. Background technique [0002] Hydrogen peroxide (H 2 o 2 ) electrochemical synthesis, also known as "electrochemical peroxidation" process, is an electrochemical cathodic reduction reaction, with the development of electro-fenton in water treatment, H 2 o 2 The electrochemical generation has also received extensive attention. The basic principle is that dissolved oxygen generates H through redox of two electrons on the surface of the cathode. 2 o 2 , the response is as follows: [0003] o 2 +2H + +2e - →H 2 o 2 [0004] In recent years, carbon materials have been increasingly used as the source of H 2 o 2 Its main advantages include: good chemical stability, electrical conductivity and corrosion resistance, high hydrogen evolution potenti...

Claims

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Application Information

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IPC IPC(8): C25B11/02C25B11/14C25B1/30
Inventor 周明华张超于新民任更波
Owner NANKAI UNIV
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