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Preparation method of nickel nitride graphene composite material-loaded previous metal nanoparticle

A technology of graphene nanosheets and composite materials, which is applied in the field of materials science, can solve the problems of high price and low catalytic activity of catalysts, achieve the effect of simple and clear preparation process, and improve electrochemical activity and stability

Inactive Publication Date: 2018-09-28
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0003] Aiming at the above-mentioned technical problems existing in catalysts in the prior art, the present invention provides a method for preparing nickel nitride graphene composite material loaded noble metal nanoparticles, the nickel nitride graphene composite material loaded noble metal nanoparticle The preparation method should solve the technical problems of low catalytic activity and high price of direct alcohol fuel cell catalysts in the prior art

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  • Preparation method of nickel nitride graphene composite material-loaded previous metal nanoparticle
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Embodiment 1

[0025] A preparation method of nickel nitride graphene composite material loaded noble metal nanoparticles, specifically comprising the following steps:

[0026] (1) Preparation of nickel nitride graphene composites

[0027] ① Preparation of nickel nitride: 0.594g of nickel chloride hexahydrate (NiCl 2 ·6H 2 O), 0.185g ammonium chloride (NH 4 Cl) and 0.75g of urea were dissolved in 50ml of deionized water. After ultrasonic dispersion, they were heated in a hydrothermal kettle at 120°C for 6 hours, and then dried at 80°C after taking them out. Heat the dried sample at 250°C in the air for 2 hours, collect the product after cooling to room temperature, then use a tube furnace to raise the temperature to 380°C under an ammonia atmosphere and keep it for 1 hour, and the product collected after natural cooling is Ni 3 N.

[0028] ② Graphene activation method: immerse graphene in 6M potassium hydroxide solution for 12 hours, and centrifuge the obtained samples with deionized wat...

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Abstract

The invention provides a preparation method of nickel nitride graphene composite material-loaded previous metal nanoparticle. The preparation method comprises the steps of preparing a nickel nitride graphene composite material; respectively washing a nickel nitride nanosheet and a graphene nanosheet layer material with ethyl alcohol and water after ball-milling under argon protection, performing filtering to obtain the nickel nitride graphene composite material, and performing vacuum drying and collection; and dispersing the nickel nitride graphene composite material in the ethyl alcohol, adding a stabilizing agent and a metal precursor after ultrasonic treatment, continuing to perform ultrasonic stirring, adjusting pH to be 9-11, adding a reducing agent, continuing to stir, and obtainingthe nickel nitride graphene composite material-loaded previous metal nanoparticle after vacuum drying. The nickel nitride graphene composite material carrier is combined very well with previous metal,the electrochemical activity and the stability of a fuel cell catalyst are effectively improved, and moreover, the preparation process is easy to operate and is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a fuel cell anode catalyst material, in particular to a preparation method of a nickel nitride graphene composite material loaded with noble metal nanoparticles. Background technique [0002] Due to the increasing shortage of fossil fuels in the world and the increasing seriousness of environmental pollution in recent years, people have a huge demand for green and environmentally friendly energy equipment, which can efficiently generate electricity with almost no emissions. generate electricity. Since ethanol has a very high energy density and is available in a wide range of sources, it can be produced in large quantities from agricultural raw materials and biomass, making it an abundant and cheap liquid fuel. The electrocatalysts of direct alcohol fuel cells are dominated by noble metals, but the reserves of noble metals in nature are limited and expensive, and they are easily po...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88
CPCH01M4/88H01M4/925H01M4/926Y02E60/50
Inventor 徐群杰吴桐余克朱庆鹏王啸白伉伉范金辰闵宇霖
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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