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Preparation method of nitrogen-doped carbon/graphene/manganese oxide composite material and application of nitrogen-doped carbon/ graphene/manganese oxide composite material in electrocatalytic reduction of oxygen

A composite material, graphene technology, applied in circuits, electrical components, battery electrodes, etc., can solve problems such as low catalytic efficiency, and achieve excellent oxygen reduction catalytic activity and catalytic efficiency.

Active Publication Date: 2016-09-28
CHANGZHOU UNIV
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of low catalytic efficiency of traditional oxygen reduction electrode materials, and prepare an oxygen reduction electrode material with good electrical conductivity and high catalytic efficiency

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  • Preparation method of nitrogen-doped carbon/graphene/manganese oxide composite material and application of nitrogen-doped carbon/ graphene/manganese oxide composite material in electrocatalytic reduction of oxygen
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  • Preparation method of nitrogen-doped carbon/graphene/manganese oxide composite material and application of nitrogen-doped carbon/ graphene/manganese oxide composite material in electrocatalytic reduction of oxygen

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Embodiment

[0022] The preparation of nitrogen-doped carbon / graphene / manganese oxide composites and their electrocatalytic activity for oxygen reduction include the following steps:

[0023] (1) 0.1 g of graphene oxide was ultrasonically dispersed in 100 mL of deionized water, and then 0.3 g of m-phenylenediamine monomer was added and ultrasonically mixed for 10 min. Pour the mixture into a three-necked flask, heat it to 95°C for 12 hours, cool to room temperature, then add 0.435g of potassium permanganate solution to the reaction solution, stir for 4 hours, wash and filter, freeze-dry for 24 hours, and finally place the product at 800°C The nitrogen-doped carbon / graphene / manganese oxide composite material was prepared in a tube furnace at a constant temperature for 2 hours. The specific surface area of ​​the material was 486.17m2 by BET test. 2 g -1 .

[0024] (2) The nitrogen-doped carbon / graphene / manganese oxide composite material prepared in step (1) is ultrasonically dispersed, and...

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Abstract

The invention relates to a preparation method of a nitrogen-doped carbon / graphene / manganese oxide composite material and an application of the nitrogen-doped carbon / graphene / manganese oxide composite material in electrocatalytic reduction of oxygen. The method comprises the following steps of preparing the nitrogen-doped carbon / graphene / manganese oxide composite material; and modifying the nitrogen-doped carbon / graphene / manganese oxide composite material on an electrode to test the electrocatalytic activity of the material on oxygen reduction. The preparation method has the beneficial effects that the nitrogen-doped carbon / graphene / manganese oxide composite material is prepared by a simple and feasible method; in the overall preparation process, poly-metaphenylene diamine plays an important role; graphene reserves a large specific surface area, and poly-metaphenylene diamine is a nitrogen source of nitrogen-doped carbon; and finally the nitrogen-doped carbon / graphene / manganese oxide composite material has excellent oxygen reduction electrocatalytic properties.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen-doped carbon / graphene / manganese oxide composite material and its application to the electrocatalytic reduction of oxygen, belonging to the field of electrocatalysis and material synthesis. technical background [0002] In energy conversion devices such as fuel cells, the oxygen reduction reaction is a very important reaction. As we all know, platinum-based materials have the most prominent catalytic activity among many oxygen reduction catalysts, but the disadvantages of platinum catalysts, such as high price, scarce reserves and poor stability, are the main factors restricting its development. In order to improve the utilization of platinum catalysts or find other catalysts with high oxygen reduction activity, scientists have done a lot of research. [0003] A large number of recent studies have used carbon materials doped with nitrogen atoms to replace platinum catalysts. Nitrogen-doped ca...

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Application Information

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IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/9083Y02E60/50
Inventor 孔泳王丙虎李凯健
Owner CHANGZHOU UNIV
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