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Preparation method of multi-component doped activated carbon electrode and activated carbon catalyst characterization and oxygen reduction electrocatalyst testing method

An activated carbon and catalyst technology, applied in the field of electrocatalytic synthesis, can solve problems such as low current efficiency, and achieve the effects of enhanced selectivity, low cost, strong catalytic stability and environmental resistance

Active Publication Date: 2019-04-23
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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Problems solved by technology

[0004] The purpose of the present invention is to provide a low-cost current efficiency problem in the field of electrosynthesis of hydrogen peroxide, to develop a cheap multi-component doped activated carbon electrode

Method used

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  • Preparation method of multi-component doped activated carbon electrode and activated carbon catalyst characterization and oxygen reduction electrocatalyst testing method
  • Preparation method of multi-component doped activated carbon electrode and activated carbon catalyst characterization and oxygen reduction electrocatalyst testing method
  • Preparation method of multi-component doped activated carbon electrode and activated carbon catalyst characterization and oxygen reduction electrocatalyst testing method

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Embodiment Construction

[0051] The present invention will be described in further detail below in conjunction with embodiment:

[0052] 1. CoO x Synthesis of @N-AC:

[0053] Get 10g 200 mesh mesoporous activated carbon, 5gCo(NO 3 ) 2 ·6H 2 O and 4g melamine, dispersed in 300ml deionized water, ultrasonically dispersed for 4h, and then placed in an oven at 80°C until the deionized water was completely dried, and then dispersed in a vacuum disperser for 30 minutes; the dispersed mixed powder Put it in a muffle furnace, raise it to 800°C at 5°C / min under a nitrogen atmosphere, anneal at 800°C for 2 hours, and then cool it naturally to room temperature to obtain CoO x @N-AC.

[0054] 2. CoO x Characterization and oxygen reduction electrocatalysis test of @N-AC:

[0055] Take a certain amount of activated carbon powder, measure the nitrogen adsorption curve of mesoporous activated carbon by specific surface area measuring instrument (M / s, Quantachrome USA) and calculate the specific surface area of...

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Abstract

The invention relates to the field of electrochemical synthesis, particularly to a preparation method of a cobalt oxide and nitrogen-doped mesoporous activated carbon electrode. The preparation methodcomprises (1) preparing a catalyst precursor with mesoporous activated carbon as the substrate through a one-pot method; (2) performing annealing synthesis to obtain a multi-component doped activatedcarbon catalyst; (3) preparing and rolling electrode membrane gel to obtain electrode membranes; (4) rolling two pieces of the electrode membranes onto a current collector to form a sandwich-structured electrode. The preparation method of the cobalt oxide and nitrogen-doped mesoporous activated carbon electrode is simple and easy to operate. The manufactured cobalt oxide and nitrogen-doped mesoporous activated carbon electrode is provided with a large number of mesoporous structures on the surface to provide oxygen reduction catalytic sites; meanwhile, by doping in nitrogen and cobalt oxide,oxygen and free radicals on the catalytic sites on the surface of the electrode can reduce adsorption energy barriers, and reduction of oxygen on the surface of the electrode can be accelerated; besides, doping of the cobalt oxide can enhance selectivity of the two-electron process of oxygen reduction reaction, and the current efficiency of hydrogen peroxide electrolysis and synthesis can be high.

Description

technical field [0001] The invention relates to the field of electrocatalytic synthesis, in particular to a preparation method of a multi-component doped activated carbon electrode, a characterization of an activated carbon catalyst and a redox electrocatalytic test method. Background technique [0002] Hydrogen peroxide plays an important role in the fields of chemical synthesis and environmental treatment. However, the current synthesis methods of hydrogen peroxide are mainly the anthraquinone method and the direct hydrogen-oxygen synthesis method. These methods have many problems such as complex technology, high energy consumption for synthesis, large consumption of chemical agents, and potential safety hazards. The electrosynthesis of hydrogen peroxide reduces the oxygen in the electrolyte to hydrogen peroxide through the oxygen reduction reaction that occurs at the cathode during the electrolysis process. Prospects for the synthesis of hydrogen peroxide. [0003] Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/30C25B11/03C25B11/06B01J27/24B01J35/02B01J35/00
CPCC25B1/30B01J27/24C25B11/031C25B11/043B01J35/33B01J35/00B01J35/30
Inventor 张云澍陈福明
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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