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Nitrogen-doped hollow carbon ball loaded palladium-based catalyst and preparation method thereof, and alcohol fuel cell applying same

A technology of nitrogen doping and catalyst, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of high catalyst preparation cost, reduce catalyst production cost, complicated steps, etc., and achieve the promotion of large-scale production and commercial application, electric Improvement of catalytic performance and improvement of battery performance

Inactive Publication Date: 2013-01-23
NANJING COMM INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problems of high catalyst preparation cost and complicated steps in the prior art, uses a simple and gentle method to synthesize the catalyst for ethanol fuel cells, improves the catalytic activity and stability of palladium-based nanoparticle catalysts, and greatly reduces production cost of the catalyst

Method used

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  • Nitrogen-doped hollow carbon ball loaded palladium-based catalyst and preparation method thereof, and alcohol fuel cell applying same
  • Nitrogen-doped hollow carbon ball loaded palladium-based catalyst and preparation method thereof, and alcohol fuel cell applying same
  • Nitrogen-doped hollow carbon ball loaded palladium-based catalyst and preparation method thereof, and alcohol fuel cell applying same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of Nitrogen-doped Hollow Carbon Spheres Supported Palladium Catalyst

[0053] (1) Synthesis of o-phenylenediamine polymer

[0054] Add 0.26g of o-phenylenediamine into a 50mL round bottom flask, disperse it in 30mL of secondary water and stir for 20 minutes, then place it in a 5°C water bath and stir for 40 minutes, then add 0.50g of ammonium persulfate, stir for 5 minutes, stop stirring, The flask was placed in a refrigerator at 5°C for 12 hours. Take out the suction filter, wash with 250mL ammonia water with a mass fraction of 5% and double distilled water until the filtrate is clear. The filtered solid was taken out and dried under vacuum at 50°C for 12 hours. The solid obtained by drying is o-phenylenediamine polymer.

[0055] (2) Heat treatment of o-phenylenediamine polymer

[0056] The o-phenylenediamine polymer was placed in a tube furnace, and under the protection of nitrogen, it was pyrolyzed at 850° C. for 4 hours to obtain nitrogen-doped hollo...

Embodiment 2 Embodiment 3

[0062] Take the same two parts of the o-phenylenediamine polymer obtained in the first step (1) of Example 1, place them in a tube furnace, and under the protection of nitrogen, pyrolyze them at 350°C and 550°C for 4 hours respectively , to obtain nitrogen-doped carbon spheres with a particle size of 400nm (Example 2) and 350nm (Example 3). (Particle size measured by SEM and TEM)

[0063] The nitrogen-doped hollow carbon spheres obtained in Example 2 and Example 3 were prepared according to the method and experimental conditions in step (3) of Example 1, respectively, to obtain nitrogen-doped hollow carbon sphere-supported palladium catalysts. According to elemental analysis and plasma inductively coupled spectroscopic analysis, as well as nitrogen adsorption and desorption curves:

[0064] For the palladium catalyst prepared in Example 2, the nitrogen doping ratio is 22.4% (mass), the metal loading is 40% (mass), and the specific surface area is 49.2m 2 / g;

[0065] The pa...

Embodiment 4

[0068] Preparation of Palladium and Cobalt Alloy Catalysts Supported by Nitrogen-doped Hollow Carbon Spheres

[0069] Add 0.26g of o-phenylenediamine to a 50mL round bottom flask, disperse in 30mL of secondary water and stir for 10 minutes, then place in a 5°C water bath and stir for 30 minutes, then add 0.50g of ammonium persulfate, stir for 5 minutes, stop stirring, The flask was placed in a refrigerator at 5° C. for 20 hours to react. Take out the suction filter, wash with 250mL ammonia water with a mass fraction of 5% and double distilled water until the filtrate is clear. The filtered solid was taken out and dried under vacuum at 50°C for 12 hours. The solid obtained by drying is o-phenylenediamine polymer.

[0070] The obtained o-phenylenediamine polymer was placed in a tube furnace, and under the protection of nitrogen, it was pyrolyzed at 850° C. for 4 hours to obtain nitrogen-doped carbon hollow spheres.

[0071] Disperse 100 mg of nitrogen-doped carbon hollow sphe...

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Abstract

The invention relates to a preparation method of a nitrogen-doped hollow carbon ball loaded palladium-based catalyst, which comprises the following steps of: dispersing o-phenylenediamine in a solvent for being stirred at a low temperature, adding an initiator for reacting for 12-24h, then extracting and filtering, and drying in vacuum to obtain a poly(o-phenylenediamine) hollow ball; pyrolyzing an o-phenylenediamine polymer at a high temperature for 2-6h under the protection of an inert gas to obtain a nitrogen-doped hollow carbon ball; and dispersing the nitrogen-doped hollow carbon ball into water, adding a chloropalladic acid solution for ultrasonic treatment, adding a reducing agent for ultrasonic treatment, extracting and filtering after the reaction is completed, and drying in vacuum to obtain the nitrogen-doped hollow carbon ball loaded palladium-based catalyst. The nitrogen-doped hollow carbon ball loaded palladium-based catalyst prepared by adopting the preparation method has the nitrogen content of 10.4-22.4wt%, has the advantages of excellent oxidization reaction catalysis property to alcohol, stable performance, low preparation cost and simple preparation process, and is a novel high-performance catalyst for a low-temperature direct alcohol fuel cell anode.

Description

technical field [0001] The invention relates to a palladium-based catalyst supported by hollow carbon spheres with high nitrogen content and a preparation method thereof. The invention also relates to the application of the catalyst in the anode of a low-temperature direct ethanol fuel cell, which belongs to the field of fuel cell material science and technology. Background technique [0002] Ethanol is the organic molecule with the simplest structure among chain alcohol molecules. It can be fermented and produced in large quantities from crops, and can also be obtained from other biomass sources. It is a renewable energy source with a wide range of sources. Most importantly, ethanol is less toxic than methanol. Therefore, the direct ethanol fuel cell has a wide range of practical applications and can achieve high economic value. As an important part of direct ethanol fuel cell, the price of catalyst determines its application prospect. The most studied direct ethanol fuel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92
CPCY02E60/50
Inventor 钱晓琳沈旭徐有军
Owner NANJING COMM INST OF TECH
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