Method for preparing alkaline hydrogen peroxide in situ

A hydrogen peroxide, in-situ preparation technology, applied in the electrolysis process, electrodes, cells, etc., can solve the problems of easy explosion, hydrogen peroxide production pollution, etc., and achieve the effect of convenient output amplification and space saving

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

[0004] The technical problem to be solved by the present invention is to provide a newly designed fuel cell membrane reactor, and use the fuel cell membra

Method used

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  • Method for preparing alkaline hydrogen peroxide in situ
  • Method for preparing alkaline hydrogen peroxide in situ
  • Method for preparing alkaline hydrogen peroxide in situ

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Embodiment 1

[0033] Vucan XC-72 treated at a high temperature of 2100°C is used as the cathode catalyst, and the catalyst loading is 1mg / cm2; Pt / C is used as the anode catalyst, and the catalyst loading is 0.4mg(Pt) / cm 2 ., gold-plated stainless steel is the cathode and anode end plates, the anode hydrogen pressure is 0.01MPa, the flow rate is 76ml / min; the cathode oxygen pressure is 0.01MPa, the flow rate is 76ml / min, the operating temperature is 25°C, and the electrolyte is 2mol / L KOH solution , the electrolyte does not circulate. When the external circuit is closed, under this condition, the generation rate of hydrogen peroxide is 0.1mol / L cm 2 , current density 20mA / cm 2 .

Embodiment 2

[0035] Vucan XC-72 treated at 2100°C is used as the cathode catalyst, and the catalyst loading is 2mg / cm 2 ; Pt / C is the anode catalyst, and the loading of the catalyst is 0.4mg(Pt) / cm 2 ., gold-plated stainless steel is the cathode and anode end plates, the anode hydrogen pressure is 0.01MPa, the flow rate is 76ml / min; the cathode oxygen pressure is 0.01MPa, the flow rate is 76ml / min, the operating temperature is 25°C, the electrolyte is 2mol / L KOH solution, the electrolyte Do not loop. When the external circuit is closed, under this condition, the generation rate of hydrogen peroxide is 0.3mmol / L cm 2 , current density 40mA / cm 2 .

Embodiment 3

[0037] Vucan XC-72 treated at a high temperature of 2100°C is used as the cathode catalyst, and the catalyst loading is 3mg / cm2; Pt / C is used as the anode catalyst, and the catalyst loading is 0.4mg(Pt) / cm 2 ., gold-plated stainless steel is the cathode and anode end plates, the anode hydrogen pressure is 0.01MPa, the flow rate is 76ml / min; the cathode oxygen pressure is 0.01MPa, the flow rate is 76ml / min, the operating temperature is 25°C, the electrolyte is 2mol / L KOH solution, the electrolyte Do not loop. When the external circuit is closed, a voltage of 1V is applied to both ends of the reactor through a constant current power supply. Under this condition, the generation rate of hydrogen peroxide is 0.2mmol / L cm 2 , current density 30mA / cm 2 .

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Abstract

The invention relates to a method for preparing alkaline hydrogen peroxide in situ, which is used for taking hydrogen, oxygen and an alkaline solution as raw materials to prepare an alkaline hydrogen peroxide water solution by direct electrocatalysis in situ. The preparing method adopts a membrane reactor, the oxygen and the hydrogen enter cathode and anode by the air inlets of a cathode end plate and an anode end plate and generate electrochemical reaction on the gas diffusion electrode loading with nano electro-catalyst, and the obtained product rapidly enters an electrolyte solution to be beneficial to the enrichment of the hydrogen peroxide. The middle adopts a cation-exchange membrane, so the explosion hazard of direct reaction of the hydrogen and the oxygen is avoided, and the safety is high. The volume of the reactor is small, and the product can be simply separated from reactants. Adopting the gas diffusion electrode loading with the nano electro-catalyst, the preparing method effectively increases the three-phase reaction interface, improves the utilization ratio of the catalyst, and increases the reaction rate. The use of the nano electro-catalyst can effectively reduce the over potential of reaction and energy consumption.

Description

technical field [0001] The invention relates to a method for preparing an aqueous alkaline hydrogen peroxide solution, more specifically to a method for preparing hydrogen peroxide through a fuel cell reaction device, and belongs to the fields of energy, catalysis, chemical industry and related fields. Background technique [0002] Hydrogen peroxide is an important inorganic chemical raw material and fine chemical product, widely used in chemical synthesis, bleaching of pulp, paper and textiles, treatment of metal minerals, environmental protection, electronics, military and aerospace and other fields. With the rapid development of the global economy, the application fields of hydrogen peroxide continue to expand, and its market demand is also increasing, and the market is tight. The anthraquinone method is commonly used in the industrial production of hydrogen peroxide at home and abroad, and it has been further improved in terms of improving the efficiency and life of hydr...

Claims

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Application Information

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IPC IPC(8): C25B1/30C25B9/08C25B11/06C25B9/19
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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