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Carbon-loaded monodisperse Pt-Ni nanoparticle catalyst prepared by electro-deposition and preparation and application of carbon-loaded monodisperse Pt-Ni nanoparticle catalyst

A nanoparticle and electrodeposition technology, which is applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems of insufficient binding force and stability between alloy particles and carriers

Active Publication Date: 2020-09-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the preparation process, the Pt source precursor and the M source precursor are dissolved in an organic solvent, and the volume molar concentration of the metal precursor in the mixed solution is 1-20 mmol / L. However, the binding force between the alloy particles and the carrier and Insufficient stability

Method used

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  • Carbon-loaded monodisperse Pt-Ni nanoparticle catalyst prepared by electro-deposition and preparation and application of carbon-loaded monodisperse Pt-Ni nanoparticle catalyst

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Comparison scheme
Effect test

Embodiment 1

[0050] A preparation method for preparation of carbon-supported monodisperse Pt-Ni nanoparticle catalyst by electrodeposition, comprising the steps of:

[0051] A. Pretreatment of carbon black powder in acid; add carbon black powder into concentrated nitric acid, stir, and ultrasonically form a uniformly dispersed mixed solution a; heat the mixed solution a to 90°C, reflux at a constant temperature for 45 hours, and then process the product Several times of filtration treatment until the filtrate is neutral, the solid is dried in vacuum to obtain the pretreated carbon black powder; the mass volume ratio of the carbon black powder and concentrated nitric acid is 10mg:1mL; the vacuum drying temperature is 60°C, The time is 24h.

[0052] B, preparation of carbon black carrier modified glassy carbon electrode; adopt electronic balance to take by weighing 7.2mg carbon black carrier after A step pretreatment, be dispersed in 2mL isopropanol, the amount of carbon black carrier and is...

Embodiment 2

[0062] A preparation method for preparation of carbon-supported monodisperse Pt-Ni nanoparticle catalyst by electrodeposition, comprising the steps of:

[0063]A. Pretreatment of carbon black powder in acid; add carbon black powder into concentrated nitric acid, stir, and ultrasonically form a uniformly dispersed mixed solution a; heat the mixed solution a to 90°C, reflux at a constant temperature for 45 hours, and then process the product Several times of filtration treatment until the filtrate is neutral, the solid is dried in vacuum to obtain the pretreated carbon black powder; the mass volume ratio of the carbon black powder and concentrated nitric acid is 10mg:1mL; the vacuum drying temperature is 60°C, The time is 24h.

[0064] B, preparation of carbon black carrier modified glassy carbon electrode; adopt electronic balance to take by weighing 7.2mg carbon black carrier after A step pretreatment, be dispersed in 2mL isopropanol, the amount of carbon black carrier and iso...

Embodiment 3

[0073] A preparation method for preparation of carbon-supported monodisperse Pt-Ni nanoparticle catalyst by electrodeposition, comprising the steps of:

[0074] A. Pretreatment of carbon black powder in acid; add carbon black powder into concentrated nitric acid, stir, and ultrasonically form a uniformly dispersed mixed solution a; heat the mixed solution a to 90°C, reflux at a constant temperature for 45 hours, and then process the product Several times of filtration treatment until the filtrate is neutral, the solid is dried in vacuum to obtain the pretreated carbon black powder; the mass volume ratio of the carbon black powder and concentrated nitric acid is 10mg:1mL; the vacuum drying temperature is 60°C, The time is 24h.

[0075] B, preparation of carbon black carrier modified glassy carbon electrode; adopt electronic balance to take by weighing 7.2mg carbon black carrier after A step pretreatment, be dispersed in 2mL isopropanol, the amount of carbon black carrier and is...

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Abstract

The invention discloses a carbon-loaded monodisperse Pt-Ni nanoparticle catalyst prepared by electro-deposition and a preparation method and application thereof, and relates to the technical field ofnano materials / electrochemical technologies and fuel cell catalysts. The carbon-loaded monodisperse Pt-Ni nanoparticle catalyst comprises a carrier with Pt-Ni nanoparticles uniformly dispersed on thesurface, wherein the carrier is carbon black powder, the particle size of the Pt-Ni nanoparticles is about 3-5 nanometers, pt-Ni nanoparticles are reduced and deposited on the carrier from organic electrolyte solution in which the supporting electrolyte, the Pt source precursor and the Ni source precursor are dissolved through a constant potential electrodeposition method, and the carbon-supportedPt-Ni nanoparticle catalyst for the fuel cell is obtained. The method is advantaged in that the monodisperse carbon-supported Pt-Ni nanoparticle catalyst can be directly prepared in one step, catalytic activity of the monodisperse carbon-supported Pt-Ni nanoparticle catalyst is adjusted by changing the molar concentration of the nickel source precursor, and a purpose of simplifying the preparation method of the platinum alloy nanoparticle catalyst is achieved.

Description

technical field [0001] The invention relates to the technical field of nanomaterials / electrochemical technology and fuel cell catalysts, and relates to a carbon-supported monodisperse Pt-Ni nanoparticle catalyst prepared by electrodeposition and its preparation and application, especially to a carbon-supported catalyst prepared by electrodeposition in an organic system. Monodisperse Pt-Ni nanoparticle catalysts and methods and applications thereof. Background technique [0002] Due to the increasing demand for energy in human social life and production development, the energy pattern dominated by fossil fuels has caused irreversible damage to the earth's ecological environment for a long time. , Efficient energy and utilization methods are the only way for the current and future social development. Hydrogen fuel cells use hydrogen as fuel and can directly convert chemical energy into electrical energy. The final product is only water. It has the advantages of high energy co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/92C25D3/56
CPCH01M4/8853H01M4/9083H01M4/9058H01M4/926H01M4/921C25D3/562C25D3/567Y02E60/50
Inventor 章俊良赵路甜沈水云闫晓晖王超罗柳轩范月恒
Owner SHANGHAI JIAO TONG UNIV
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