Efficient electrochemical reactor of electro-catalysis in-situ hydrogen peroxide

A hydrogen peroxide, in-situ generation technology, applied in the electrolysis process, electrolysis components, cells, etc., can solve the problems of rare reactor detailed reports, achieve the effects of improving safety, simplifying assembly, and increasing utilization

Active Publication Date: 2010-06-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the development of nanotechnology, combined with nanotechnology and fuel cell electrode preparation technology, an environmentally friendly preparation method - the synthesis of hydrogen peroxide in a fuel cell reactor was proposed, which has the characteristics of green, energy saving, an

Method used

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  • Efficient electrochemical reactor of electro-catalysis in-situ hydrogen peroxide
  • Efficient electrochemical reactor of electro-catalysis in-situ hydrogen peroxide
  • Efficient electrochemical reactor of electro-catalysis in-situ hydrogen peroxide

Examples

Experimental program
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Effect test

Embodiment 1

[0025] An anode gas diffusion electrode with a platinum loading of 0.5 mg / cm2 and a partially graphitized XC-72 gas diffusion electrode were prepared. Put the anode gas electrode, Nafion117 membrane and cathode diffusion electrode into the battery respectively. Configure 2Mol / L NaOH solution, and inject the electrolyte solution into the cathode and anode reaction chambers respectively. Cathode and anode respectively pass through O 2 、H 2 , the flow rate is 80mL / min, the temperature of the battery is controlled at about 0 degrees, and it is discharged in the form of a short circuit, such as figure 1 , after two hours, the concentration of hydrogen peroxide obtained on the cathode side is 2%, and the maximum current density is 50mA / cm 2 .

Embodiment 2

[0027] Prepare a platinum loading of 0.5 mg / cm 2The anode gas diffusion electrode and the partially graphitized XC-72 gas diffusion electrode. Put the anode gas electrode, Nafion117 membrane and cathode diffusion electrode into the battery respectively. Configure 2Mol / L NaOH solution, and inject the electrolyte solution into the cathode and anode reaction chambers respectively. Cathode and anode respectively pass through O 2 、H 2 , the flow rate is 80mL / min, and the temperature of the battery is controlled at about 0 degrees. Apply a voltage of 1V to both ends of the reactor through an external circuit, such as figure 2 , after two hours, the concentration of hydrogen peroxide on the cathode side is 4%, and the maximum current density is 100mA / cm 2 .

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Abstract

The invention discloses an efficient electrochemical reactor of electro-catalysis in-situ hydrogen peroxide. The reactor consists of a two-cavity reaction system and an external circuit. A solid polymer electrolyte membrane is arranged in the middle of the two-cavity reaction system and can separate a cathode reaction and an anode reaction. The two-cavity reaction system mainly comprises a cathode end plate, a cathode gas diffusion electrode, a cathode chamber, an ion exchange membrane, an anode chamber, an anode gas diffusion electrode and an anode end place from left to right. The external circuit consists of an ammeter, a voltmeter and a variable resistor. The reactor effectively improves a three-phase reaction interface and a reaction rate by utilizing the gas diffusion electrodes loaded with a catalyst. Electrolyte in the cathode and anode chambers for participating in the reaction can rapidly diffuse a reaction product in a solution, so that the reaction products are enriched and the concentration of the reaction product is improved. A current and the reaction speed can be adjusted by adjusting the variable resistor. The electrolyte at a cathode and at an anode can circulate under the action of a circulating pump to maintain a higher conductivity of the system and the high reaction rate of the electrode reaction.

Description

technical field [0001] The invention relates to an electrochemical reactor, in particular to a novel electrochemical reactor for generating hydrogen peroxide in situ with high-efficiency electrocatalysis. Background technique [0002] Hydrogen peroxide is an environmentally friendly strong oxidizing agent, chemical bleaching agent, and a series of important source products of peroxides. With the improvement of environmental protection requirements, it is widely used in chemical industry, medicine, food, electronics, environmental protection and other fields. It is replacing traditional potassium dichromate and potassium permanganate to become a new "clean oxidant". people's attention. The commonly used hydrogen peroxide is produced by the chemical anthraquinone method. In this method, an organic solvent containing 2-ethylanthraquinone is used as a working fluid, and hydrogen and oxygen are passed through to circulate between hydroquinone and quinone and hydrolyze. to get h...

Claims

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Application Information

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IPC IPC(8): C25B1/30C25B9/06C25B9/17
Inventor 俞红梅张新卫衣宝廉邵志刚朱红
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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