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Graphene/graphite-like-phase carbon nitride/palladium nano particle multistage nano-structure composite material preparation method and application

A technology of graphite phase carbon nitride and nanostructure, which is applied in the direction of chemical instruments and methods, structural parts, physical/chemical process catalysts, etc., can solve the problems of low methanol oxidation catalytic activity and small specific surface area, and reduce the ratio of graphene The effect of surface reduction, simple process and quick operation

Active Publication Date: 2019-02-19
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0004] The present invention aims to solve the existing technical problems of low methanol oxidation catalytic activity and small specific surface area, and provides a method for preparing a graphene / graphite-like phase carbon nitride / palladium nanoparticle multi-level nanostructure composite material and its application

Method used

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  • Graphene/graphite-like-phase carbon nitride/palladium nano particle multistage nano-structure composite material preparation method and application

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specific Embodiment approach 1

[0022] Specific embodiment one: this embodiment is a kind of preparation method of graphene / graphite-like phase carbon nitride / palladium nanoparticle multilevel nanostructure composite material, specifically carries out according to the following steps:

[0023] 1. Ultrasonic disperse graphite oxide in a citric acid-sodium citrate buffer solution with a pH of 6.0 for 3h to 3.5h to obtain a graphene oxide solution with a concentration of 0.2g / L to 0.25g / L;

[0024] PdCl 2 Mix with NaCl evenly, then add secondary water, stir magnetically at room temperature for 10h~11h, and get Na with a concentration of 0.1mol / L~0.12mol / L 2 PdCl 4 solution; the NaCl and PdCl 2 The mass ratio of 0.65:1;

[0025] Put the melamine into the horse boiling furnace, raise the temperature from room temperature to 550°C-600°C under the condition of heating rate of 2.3°C / min-2.5°C / min, keep the temperature at 550°C-600°C for 3h-5h, and then Drop to room temperature at a cooling rate of 1°C / min to obt...

specific Embodiment approach 2

[0030] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the graphite oxide described in step 1 is obtained by the Improved oxidation method. Others are the same as the first embodiment.

specific Embodiment approach 3

[0031] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: g-C described in step two 3 N 4 The volume ratio of dispersion liquid to graphene oxide solution is 1:10. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a graphene multistage nano-structure composite material preparation method and application, in particular to a graphene / graphite-like-phase carbon nitride / palladium nano particle multistage nano-structure composite material preparation method and application and aims to solve technical problems of low methanol oxidation catalytic activity and small specific surface area atpresent. The method includes: firstly, preparing graphene oxide, Na2PdCl4 solution and g-C3N4 dispersion liquid; secondly, preparing electrolyte; thirdly, performing electro-deposition. A compositionmaterial prepared according to the method serves as a methanol oxidation catalyst. The preparation method has advantages of technical simplicity, greenness, environmental friendliness and convenienceand quickness in operation. The graphene / g-C3N4 / palladium nano particle multistage nano-structure composite material can be extensively applied to the field of electrocatalytic oxidation.

Description

technical field [0001] A preparation method and application of a multi-level nanostructure composite material of graphene. Background technique [0002] Compared with gas fuel cells, direct methanol fuel cells (DMFC) are easy to store and transport methanol, and have high energy conversion efficiency. The reaction products are mainly water and a small amount of carbon dioxide, which is an environmentally friendly green energy source. increasingly receiving widespread attention. DMFC is expected to be one of the ideal mobile or miniaturized power sources, and has broad application prospects and huge potential markets in transportation, communication, military, aerospace and other aspects. At present, there are three key issues in the basic research of direct methanol fuel cell (DMFC) that deserve special attention: First, the electrocatalytic oxidation reaction activity of methanol on the anode at low temperature is low, and the polarization is severe, and it is necessary to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00H01M4/92
CPCH01M4/925B01J27/24B01J35/396B01J35/393B01J35/33Y02E60/50
Inventor 杨利明陈政霖罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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