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Electrochemical device, method for electrochemically decomposing urea to synthesize hydrogen peroxide, and application

A hydrogen peroxide and electrochemical technology, applied in the field of chemistry, can solve the problem of high input cost, and achieve the effect of solving high input cost, reducing production cost, and low modularization of equipment and equipment.

Active Publication Date: 2021-08-31
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide an electrochemical device to solve the problem of high input cost in the industrial application of the existing urea wastewater treatment method proposed in the background art

Method used

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  • Electrochemical device, method for electrochemically decomposing urea to synthesize hydrogen peroxide, and application
  • Electrochemical device, method for electrochemically decomposing urea to synthesize hydrogen peroxide, and application
  • Electrochemical device, method for electrochemically decomposing urea to synthesize hydrogen peroxide, and application

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Experimental program
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Effect test

Embodiment 1

[0067] In the electrolytic cell with the anode electrode 8 and the cathode electrode 9 separated by the proton exchange membrane, the anode electrode 8 uses a platinum sheet as the working electrode, and the catalyst uses a high-efficiency UOR catalyst; the cathode electrode 9 uses a copper sheet as the electrode, and the catalyst uses CMK-3 , the reference electrode is a silver / silver chloride electrode, a solution containing KOH (concentration 1mol / L) and urea (concentration 0.33mol / L) is circulated in the anode reaction chamber 2, and KOH (concentration 1mol / L) is circulated in the cathode reaction chamber 5. L) solution, and feed oxygen into the gas phase chamber 10, under the condition of continuous feeding, the constant potential synchronously decomposes urea and synthesizes hydrogen peroxide, and the potential is controlled at 1.2v (relative to the silver / silver chloride electrode) (without IR Correction).

[0068] The preparation process provided in Example 1 of the pr...

Embodiment 2

[0071] In an embodiment of the present invention, an electrochemical device, in an electrolytic cell separated by a proton exchange membrane into an anode electrode 8 and a cathode electrode 9, also uses a platinum sheet as a working electrode, the anode is a UOR catalyst, and the reference electrode is Mercury / mercuric oxide electrode, the negative electrode is electrode with copper sheet, and catalyst is CMK-3, and anolyte is the simulation human urine, and catholyte is KOH (concentration 1mol / L), and feeds oxygen to gas phase chamber 10, in In the case of continuous access, carry out LSV (Linear Sweep Voltammetry) test, the test time is 0min, 5min, 30min, 60min to measure LSV at each time, and the results are as follows: figure 2 and image 3 LSV plots under simulated urine conditions are shown. in, figure 2 It is the LSV curve graph under simulated urine conditions with the test time being 0min and 5min respectively, image 3 It is the LSV curve graph under simulated ...

Embodiment 3

[0074] The three-electrode system of the electrochemical device provided in embodiment 3 is carried out stability test, with platinum sheet as counter electrode, anode adopts platinum sheet as electrode, anode is UOR catalyst, reference electrode adopts mercury / mercuric oxide electrode, cathode uses The copper sheet is an electrode, the catalyst is CMK-3, the anolyte is simulated human urine, the catholyte is KOH (concentration 1mol / L), and oxygen is passed into the gas phase chamber 10, and the current-time test is carried out to obtain the following: Figure 4 The current-time graph is shown. The results show that the stability preference of the electrolysis system can well meet the actual industrial needs.

[0075] The above-mentioned embodiments of the present invention provide an electrochemical device, including an electrolytic reaction device and a gas delivery device. The electrolytic reaction device is used to decompose urea at the anode under the action of a catalyst...

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Abstract

The invention relates to the field of chemistry, and specifically discloses an electrochemical device, a method for electrochemically decomposing urea to synthesize hydrogen peroxide, and an application. The electrochemical device includes an electrolytic reaction device and a gas delivery device. Under the action of a catalyst, urea is decomposed at the anode and synthesized at the cathode by inputting oxygen or compressed air to generate hydrogen peroxide. The gas delivery device is used to deliver oxygen or compressed air to ensure simultaneous urea decomposition and synthesis of hydrogen peroxide; and provide The method of electrochemically decomposing urea to synthesize hydrogen peroxide uses oxygen or air as a raw material, and directly decomposes urea in waste water under the action of a catalyst by using a synchronous electrocatalytic reaction, and at the same time can synthesize hydrogen peroxide, which reduces the overpotential and contributes to Govern the environment, enhance the utilization rate of equipment, can effectively reduce production costs, and have great commercial value and application prospects.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to an electrochemical device, a method for electrochemically decomposing urea to synthesize hydrogen peroxide, and an application. Background technique [0002] Urea, the chemical formula is CO(NH 2 ) 2 , the shape is colorless or white needle-like or rod-like crystals, urea is currently the most used nitrogen fertilizer product with the highest nitrogen content on the market, and urea is also widely used in medicine, food, cosmetics, textiles and other fields, or to manufacture melamine, urea-formaldehyde Important raw materials for chemical products such as resins and explosives. Such a large amount of urea production and usage will inevitably produce a large amount of urea wastewater (urea-containing wastewater). With the rapid development of industry and agriculture in our country, the environmental problems caused by urea wastewater are becoming more and more serious. Urea wastewate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/30C25B9/17C25B15/08C02F1/461
CPCC02F1/46104C02F2201/4618C25B1/30C25B15/08
Inventor 陈平舒海波耿世奎胡俊王云露李士松
Owner ANHUI UNIVERSITY
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