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Palladium nanoparticle/carbon nanofiber compound, preparation method and application thereof in electrocatalysis

A carbon nanofiber, palladium nanoparticle technology, applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve the problems of high detection potential, interference, etc., to reduce detection overpotential, good dispersion and stability, high The effect of electrocatalytic activity

Active Publication Date: 2011-11-23
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on bare solid-state electrodes, the detection of these substances requires a high detection potential, which will be interfered by some coexisting electroactive substances

Method used

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  • Palladium nanoparticle/carbon nanofiber compound, preparation method and application thereof in electrocatalysis
  • Palladium nanoparticle/carbon nanofiber compound, preparation method and application thereof in electrocatalysis
  • Palladium nanoparticle/carbon nanofiber compound, preparation method and application thereof in electrocatalysis

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1, electrospinning prepares Pd / CNF composite material

[0061] 1) Preparation of electrospinning solution: polyacrylonitrile (PAN) and palladium acetate are dissolved in dimethylformamide (DMF) solution to obtain a uniform mixed solution; the content of polyacrylonitrile in the mixed solution is 8wt.%. Palladium acetate content is 4.8wt.%;

[0062] 2) Electrospinning: the uniform mixed solution obtained in step 1) is electrospun in an electric field with an electric field strength of 100kV / m to prepare polyacrylonitrile composite fibers containing palladium acetate, and the distance between the spinneret and the collecting plate is 30cm. The applied voltage is 30kV;

[0063] 3) annealing the polyacrylonitrile composite fiber containing palladium acetate obtained in step 2) at 230° C. for 3 hours to partially oxidize the PAN nanofiber;

[0064] 4) Raise the temperature to 300°C at a rate of 5°C / min, and feed H at this temperature 2 and Ar mixed gas 2h, wher...

Embodiment 2

[0067] Embodiment 2, electrospinning prepares Pd / CNF composite material

[0068] 1) Preparation of electrospinning solution: polyacrylonitrile (PAN) and palladium acetate are dissolved in dimethylformamide (DMF) solution to obtain a uniform mixed solution; the content of polyacrylonitrile in the mixed solution is 15wt.%. Palladium acetate content is 6wt.%;

[0069] 2) Electrospinning: the uniform mixed solution obtained in step 1) is electrospun in an electric field with an electric field strength of 100kV / m to prepare polyacrylonitrile composite fibers containing palladium acetate, and the distance between the spinneret and the collecting plate is 30cm. The applied voltage is 30kV;

[0070] 3) annealing the polyacrylonitrile composite fiber containing palladium acetate obtained in step 2) at 230° C. for 3 hours to partially oxidize the PAN nanofiber;

[0071] 4) Raise the temperature to 300°C at a rate of 5°C / min, and feed H at this temperature 2 and Ar mixed gas 2h, where...

Embodiment 3

[0074] Embodiment 3, electrospinning prepares Pd / CNF composite material

[0075] 1) Preparation of electrospinning solution: polyacrylonitrile (PAN) and palladium acetate are dissolved in dimethylformamide (DMF) solution to obtain a uniform mixed solution; the content of polyacrylonitrile in the mixed solution is 5wt.%. Palladium acetate content is 2wt.%;

[0076] 2) Electrospinning: the uniform mixed solution obtained in step 1) is electrospun in an electric field with an electric field strength of 100kV / m to prepare polyacrylonitrile composite fibers containing palladium acetate, and the distance between the spinneret and the collecting plate is 30cm. The applied voltage is 30kV;

[0077] 3) annealing the polyacrylonitrile composite fiber containing palladium acetate obtained in step 2) at 230° C. for 3 hours to partially oxidize the PAN nanofiber;

[0078] 4) Raise the temperature to 300°C at a rate of 5°C / min, and feed H at this temperature 2 and Ar mixed gas 2h, where,...

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Abstract

The invention relates to a palladium nanoparticle / carbon nanofiber compound, a preparation method and an application thereof in electrocatalysis. The compound is directly prepared by a one-step electrospinning method. An electrode modified by the compound is used for direct eectrochemical detection on hydrogen peroxide, beta-nicotinamide adenine dinucleotide, dopamine, ascorbic acid and lithic acid. The electrode modified by the compound has the linear range from 0.2 micrometer to 20 millimetres and the detection limit of 0.2 micrometer when being used for the detection on the hydrogen peroxide and has the linear range of 0.2-716.6 micrometers and the detection limit of 0.2 micrometer when being used for the detection on the beta- nicotinamide adenine dinucleotide; and the peak-peak potential differences between the ascorbic acid and the dopamine, the dopamine and the lithic acid as well as the ascorbic acid and the lithic acid are respectively 244mV, 148 mV and 392 mV, thereby showing that the modified electrode can be used for simultaneous eectrochemical detection of three substances. The compound can be used in the fields of catalysis, fuel cells and sensing.

Description

technical field [0001] The invention relates to a palladium nanoparticle / carbon nanofiber composite, a preparation method and its application in electrocatalysis. Background technique [0002] Due to its unique structure, good electrical conductivity, large specific surface area, high chemical stability, and mechanical strength, carbon nanofibers (CNFs) can be used as ideal catalyst supports for catalytic reactions and the preparation of sensors. Using CNF as a carrier can significantly improve the activity and stability of the catalyst, and the application of the prepared metal nanoparticles / CNF composites in electrochemical biosensors and fuel cell electrode materials has been reported in a large number of literatures. Although CNF as a fuel cell catalyst carrier can significantly enhance the catalyst activity, its high price currently limits its practical application, and it is still mainly in the laboratory research stage. Moreover, in previous methods for preparing CNF...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B82B1/00B82B3/00G01N27/30
Inventor 由天艳黄建设
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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