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Carbon-based anode material for producing chlorine through electrolysis and application thereof

A carbon-based anode and carbon-based material technology, applied in the field of electrocatalysis, can solve the problems of easy failure, easy dissolution, and unstable structure of the electrode, and achieve the effects of high catalytic activity, high selectivity, and excellent stability

Pending Publication Date: 2021-11-30
尹华杰 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a carbon-based anode material for electrolytic chlorine production and its application to solve the technical problems that the metal oxide solid solution structure in the noble metal-based DSA electrode in the prior art is unstable, easy to dissolve, and the electrode is easy to fail

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  • Carbon-based anode material for producing chlorine through electrolysis and application thereof
  • Carbon-based anode material for producing chlorine through electrolysis and application thereof
  • Carbon-based anode material for producing chlorine through electrolysis and application thereof

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preparation example Construction

[0044] In the embodiment of the present application, a method for preparing a carbon-based anode material is provided, and the method includes the following steps:

[0045] obtaining said carbon-based raw material;

[0046] performing a first treatment on the carbon-based raw material to obtain a carbon-based anode material;

[0047] The first treatment includes at least one of electrochemical treatment, hydrothermal treatment, chemical treatment and thermal treatment.

[0048] In the embodiment of the present application, the heat treatment includes heating the raw material at 300°C-1000°C for 1-4 hours in a protective atmosphere.

[0049] In the embodiment of the present application, the heat treatment is co-fired, and the chemical treatment may be acid treatment.

[0050] A gas diffusion electrode, the gas diffusion electrode is made of the carbon-based anode material as a raw material, and chlorine is produced by electrolysis.

[0051] An application of a carbon-based a...

Embodiment 1

[0054] In this embodiment, the non-metal atoms are oxygen atoms, and the base carbon is selected from high-conductivity carbon black powder BP2000. A carbon-based anode material with at least one of oxygen-containing functional groups hydroxyl, carbonyl, carboxyl and ester group, that is, a carbon-based catalyst, is prepared by high-temperature heat treatment, named O-BP.

[0055] The specific preparation steps of the O-BP2000 are as follows: Weigh a certain amount of BP2000 in a corundum crucible, place it in a muffle furnace, raise the temperature from room temperature to 400-600 °C at a rate of 5-10 °C / min, and keep the temperature constant Cool naturally after keeping for 2-3 hours, the obtained powder is O-BP, which can be used as anode material for electrochemical chlorine production.

[0056] figure 1 with figure 2 Shown are the scanning electron microscope and transmission electron microscope images of the synthesized O-BP. It can be seen from the figure that the O-...

Embodiment 2

[0058] In this embodiment, a carbon-based material doped with at least one non-metal atom among boron atoms, nitrogen atoms, and sulfur atoms is selected as the carbon-based anode material. The non-metal atoms are oxygen atoms, and the base carbon is carbon fiber. A carbon-based anode material with at least one of oxygen-containing functional groups hydroxyl, carbonyl, carboxyl and ester groups is prepared by high-temperature heat treatment, that is, a carbon-based catalyst, named O-CF.

[0059] The specific preparation steps are as follows: the carbon fiber surface is continuously anodized with the carbon fiber as the oxidation anode and the graphite rod as the cathode. With 5%-10% ammonium bicarbonate as the electrolyte, the electrolysis time is 50 seconds to 5 minutes, the electrolysis temperature is 22-80°C, and the oxidation process is controlled by adjusting the current intensity 50mA-5A during the anodic oxidation process. The electrolyte solution remaining on the surf...

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Abstract

The invention belongs to the technical field of electro-catalysis, and particularly relates to a carbon-based anode material for producing chlorine through electrolysis and application thereof, raw materials of the carbon-based anode material comprise at least one of a non-metal-doped carbon-based material, a non-noble metal-doped carbon-based material and a non-noble metal oxide-loaded carbon-based material; by doping different elements and introducing the types and the numbers of functional groups, the filling degree of a p orbit of a carbon atom in the carbon-based material near a Fermi level is regulated and controlled, so that the adsorption energy of an electrochemical chlorine production reaction intermediate is accurately regulated and controlled, and finally, the characteristics of high catalytic activity, high selectivity and long-acting stability under a strong acidic condition are realized in electrolytic chlorine production. The material can be widely applied to the fields of chlor-alkali industry, seawater electrolysis chlorine production, electrodialysis, seawater and saline water electrolysis antifouling, sewage treatment, swimming pool or drinking water disinfection and the like.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a carbon-based anode material for electrolytic chlorine production and its application. Background technique [0002] Electrochemical catalytic chlorine production is currently one of the most valuable and widely used electrochemical reactions. Its application fields include chlor-alkali industry, electrolysis of seawater for chlorine production, electrolysis of seawater for antifouling, sewage treatment, and chemical synthesis. One of the keys to electrochemical chlorine production is the anode for electrolysis. Graphite was chosen as the anode for chlorine analysis in the chlor-alkali industry in the early days, but it required a large working voltage and short life, so a titanium-based metal oxide with high stability was developed, and in the following decades of development and application, gradually Formed a series of binary composite coating electrodes...

Claims

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Application Information

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IPC IPC(8): C25B11/065C25B11/085C25B1/26
CPCC25B11/065C25B11/085C25B1/26
Inventor 尹华杰舒亚婕
Owner 尹华杰
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