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cnss-ni@pt/pm-g-c 3 no 4 Electrocatalyst and its preparation method

A pm-g-c3n4, electrocatalyst technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problem of high metal platinum utilization and catalytic activity, high catalytic efficiency, weak oxidation stability of graphene, and reduced carrier conductivity, etc. problems, to achieve the effect of reducing the loss of nanoparticles, improving electrical conductivity, and low platinum content

Active Publication Date: 2020-11-17
GUANGDONG GREAT MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, SiO 2 Combining with graphene reduces the conductivity of the carrier, which is not conducive to improving the catalytic efficiency, and graphene also has problems such as weak oxidation stability, unstable conductivity, low conductivity and high cost. In addition, although the Pt-Ni alloy catalyst reduces the Pt content, but the utilization rate and catalytic activity of metal platinum are not as high as the catalytic efficiency of the core-shell structure

Method used

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  • cnss-ni@pt/pm-g-c <sub>3</sub> no <sub>4</sub> Electrocatalyst and its preparation method
  • cnss-ni@pt/pm-g-c <sub>3</sub> no <sub>4</sub> Electrocatalyst and its preparation method
  • cnss-ni@pt/pm-g-c <sub>3</sub> no <sub>4</sub> Electrocatalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A sterically stable CNSs-Ni for high temperature fuel cells 3 @Pt / PM-g-C 3 N 4 The preparation method of electrocatalyst, concrete following steps:

[0044] 1) Prepare a 250ml four-necked flask equipped with a nitrogen conduit, a thermometer and a mechanical stirrer, pour 2.0g of melamine (Melamine) and 40ml of ethylene glycol (EG) into the four-necked flask, and heat it in a constant temperature water bath at 50°C Under the condition, feed nitrogen gas and stir at a constant speed of 150rpm. After stirring for 30 minutes, until the melamine is completely dissolved, add 60ml of 0.1M nitric acid to the saturated melamine solution while hot, and continue stirring for 30 minutes until the white precipitate is completely precipitated. The resulting white precipitate was collected for suction filtration, washed three times with deionized water and then three times with absolute ethanol to ensure that the residual nitric acid and ethylene glycol were washed clean. Then the...

Embodiment 2

[0051] A sterically stable CNSs-Ni for high temperature fuel cells 3 @Pt / PM-g-C 3 N 4 The preparation method of electrocatalyst, concrete following steps:

[0052] 1) Prepare a 250ml four-necked flask equipped with a nitrogen conduit, a thermometer and a mechanical stirrer, pour 2.0g of melamine (Melamine) and 50ml of ethylene glycol (EG) into the four-necked flask, and heat it in a constant temperature water bath at 60°C Under certain conditions, feed nitrogen gas and stir at a constant speed of 175rpm. After stirring for 30 minutes, until the melamine is completely dissolved, add 70ml of 0.1 M nitric acid to the saturated melamine solution while hot, and continue stirring for 40 minutes until the white precipitate is completely precipitated. The resulting white precipitate was collected for suction filtration, washed three times with deionized water and then three times with absolute ethanol to ensure that the residual nitric acid and ethylene glycol were washed clean. Th...

Embodiment 3

[0058] A sterically stable CNSs-Ni for high temperature fuel cells 3 @Pt / PM-g-C 3 N 4 The preparation method of electrocatalyst, concrete following steps:

[0059] 1) Prepare a 250ml four-necked flask equipped with a nitrogen conduit, a thermometer and a mechanical stirrer, pour 2.0g of melamine (Melamine) and 60ml of ethylene glycol (EG) into the four-necked flask, and heat it in a constant temperature water bath at 70°C Under certain conditions, feed nitrogen gas and stir at a constant speed of 200rpm. After stirring for 30 minutes, until the melamine is completely dissolved, add 40ml of 0.2 M nitric acid to the saturated melamine solution while hot, and continue stirring for 50 minutes until the white precipitate is completely precipitated. The resulting white precipitate was collected for suction filtration, washed three times with deionized water and then three times with absolute ethanol to ensure that the residual nitric acid and ethylene glycol were washed clean. Th...

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Abstract

The invention discloses a CNS-Ni@Pt / PM-g-C3N4 electrocatalyst and a preparation method thereof. The preparation method comprises the following steps: firstly, sintering nitric acid oxidized melamine at high temperature to prepare porous rod-like graphite carbon nitride; secondly, reducing NiCl2.6H2O and H2PtCl6.6H2O precursors step by step by adopting a liquid phase reduction method to form a Ni@Pt core-shell bimetallic nano catalyst, dispersing and attaching the Ni@Pt core-shell bimetallic nano catalyst to the surface of the porous rod-like graphite carbon nitride, and controlling the size ofcatalyst nano particles by regulating and controlling the pH value; and finally, introducing nano carbon spheres to obtain a CNSs-Ni@Pt / PM-g-C3N4 electrocatalyst. A bracket formed in the invention not only has a porous frame structure for ensuring mass transfer, but also can be used as a conductive agent to compensate the bad conductivity of gC3N4. The obtained electrocatalyst shows excellent electrochemical stability and excellent catalytic performance on oxygen reduction reaction, and is suitable for high-temperature fuel cells.

Description

technical field [0001] The present invention relates to a kind of electrocatalyst that can be used for membrane electrode of high-temperature fuel cell, relate in particular to the porous rod shape graphitic carbon nitride (PM-g-C 3 N 4 ) and its preparation method, the metal platinum and nickel of the present invention are loaded onto the surface of tubular graphitic carbon nitride in the form of core-shell nanoparticles (Ni@Pt) and incorporated into carbon nano powders (CNSs) to realize the redox reaction of the counter electrode catalytic. Background technique [0002] Energy is the basis for human survival. A fuel cell is a device that directly converts fuel chemical energy such as hydrogen and methanol into electrical energy. It has the characteristics of energy saving, environmental protection, and non-polluting products. The slow kinetics of the redox reaction (ORR) significantly limits the efficiency and performance of electrochemical energy conversion in fuel cell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/92
CPCH01M4/921H01M4/925Y02E60/50
Inventor 龙志雄彭晓宏冯凌伟龙智强
Owner GUANGDONG GREAT MATERIAL CO LTD
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