Graphite felt-based bimetallic electrode and preparation method and application thereof

A technology of graphite felt and bimetal, which is applied in the field of graphite felt-based bimetal electrode and its preparation, can solve limited problems and achieve the effect of good application prospect, simple and reasonable preparation method and application method, and efficient reduction and removal

Active Publication Date: 2021-06-18
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there have been some use of palladium-based materials as electrode materials, but the research carried out by improving the utilization efficiency of free radicals is very limited

Method used

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  • Graphite felt-based bimetallic electrode and preparation method and application thereof
  • Graphite felt-based bimetallic electrode and preparation method and application thereof
  • Graphite felt-based bimetallic electrode and preparation method and application thereof

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preparation example Construction

[0028] One embodiment of the present invention proposes a preparation method of a graphite felt-based bimetallic electrode material, comprising the following steps:

[0029] 1) Cut graphite felt into pieces, add nitric acid solution, after hydrothermal reaction, cool to room temperature, wash graphite felt until the surface is neutral, and dry;

[0030] 2) to NH 4 Add palladium chloride (PdCl 2 ) and indium trichloride (InCl 3 ), to obtain a mixed solution;

[0031] 3) with step 2) gained mixed solution is electrolytic solution, silver chloride (Ag / AgCl) is as reference electrode, and platinum (Pt) is as counter electrode, and step 1) gained graphite felt is as working electrode, connects electrochemical workstation, in Electrodeposition under constant current mode;

[0032] 4) The graphite felt after electrodeposition in step 3) is taken out, washed, and dried to obtain PdIn, a graphite felt-based bimetallic electrode material.

[0033] In an embodiment of the present in...

Embodiment 1

[0045] Example 1 A preparation method of graphite felt-based bimetallic electrode material, comprising the steps of:

[0046] (1) Cut the graphite felt (GF) into small pieces of 1.5cm*4cm, add 20mL of nitric acid, put it into a high-pressure reactor, and heat it in water at 120°C for 2 hours;

[0047] (2) Take out the graphite felt cooled to room temperature, wash with deionized water multiple times to make the surface pH wash to neutral, and then put it into an oven for drying at 40°C;

[0048] (3) Configure 50mL NH 4 Cl solution (10mM), which contains 3mMPdCl 2 and 3mM InCl 3 , immersing the above-mentioned graphite felt in the solution as a working electrode;

[0049] (4) Use Ag / AgCl as a reference electrode, Pt wire as a counter electrode, and graphite felt as a working electrode, connect to an electrochemical workstation, and electrodeposit for 30 minutes in constant current mode;

[0050](5) The electrodeposited graphite felt was taken out, washed with deionized wa...

Embodiment 2

[0052] Example 2 Experiment of using graphite felt-based bimetallic electrode material to remove pollutants in water and increase energy production

[0053] The bimetallic electrode material obtained in Example 1 is cut into slender strips, filled in the graphite pole plate gallery of the penetrating electrode reactor, as figure 2 As shown, it is mainly composed of graphite plates of two serpentine corridors and a Nafion117 diaphragm in the middle. During the loading process, the directions of the serpentine corridors are guaranteed to be perpendicular to each other. During the experiment, the water flow was pumped in from the hole on one side of the plate, flowed out from the hole at the end of the corridor, and returned to the beaker, so as to achieve the removal of pollutants. Take the pollutants trichloroacetic acid and bromate as examples to carry out specific experiments.

[0054] (1) Prepare 50 mL of 500 μg / L aqueous solution containing pollutant trichloroacetic aci...

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Abstract

The invention provides a graphite felt-based bimetallic electrode and a preparation method and application thereof, and belongs to the technical field of electrochemical water treatment. The preparation method comprises the following steps: (1) cutting a graphite felt into blocks, adding a nitric acid solution, carrying out hydrothermal reaction, cooling to room temperature, washing the graphite felt until the surface is neutral, and drying the graphite felt; (2) adding palladium chloride and indium trichloride into an NH4Cl solution to obtain a mixed solution; (3) taking the mixed solution obtained in the step (2) as an electrolyte solution, silver chloride as a reference electrode, platinum as a counter electrode and the graphite felt obtained in the step (1) as a working electrode, connecting an electrochemical workstation, and performing electro-deposition in a constant-current mode; and (4) taking out the graphite felt subjected to electro-deposition in the step (3), cleaning and drying the graphite felt to obtain the graphite felt-based bimetallic electrode material. The preparation method and the application method of the electrode material are simple and reasonable, the effect is stable, the immobilized electrode can be repeatedly used, and the effect is remarkable in the electrocatalytic reduction process of pollutants in wastewater.

Description

technical field [0001] The invention belongs to the technical field of electrochemical water treatment, and in particular relates to a graphite felt-based bimetallic electrode and a preparation method and application thereof. Background technique [0002] For the pollutants in wastewater with different characteristics, electrochemical water treatment technology is considered to be a kind of method with high efficiency, no secondary pollution and wide application. According to the different physical and chemical processes of pollutant degradation and transformation, it can be divided into electro-adsorption, electro-reduction, electro-oxidation, electro-Fenton, etc., and can be combined with other processes through a variety of electrochemical reactions to achieve the purpose of sewage purification and treatment. . In these electrochemical treatment processes, mass transfer is the core that directly affects the treatment efficiency. [0003] In the process of electroreducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/12C02F101/36
CPCC02F1/46109C02F1/46104C02F2001/46133C02F2101/12C02F2101/36C02F2209/06C02F2001/46142
Inventor 曲久辉周雨珺吉庆华胡承志孙境求
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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