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Method for loading platinum on heteroatom-doped carbon nanohorn, catalyst and application of catalyst

A carbon nanohorn and heteroatom technology, which is applied in the field of catalytic material preparation, can solve the problems of difficulty in obtaining unique structure carbon nanohorn supporting platinum, complicated processing steps, low doping amount of heteroatoms, etc., and achieves low production cost and simple equipment. , the effect of high purity

Pending Publication Date: 2022-05-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there are two main methods for heteroatom doping of carbon materials. One is to heat treat the heteroatom compound in an inert atmosphere. This method is difficult to obtain heteroatom-doped carbon nanohorn-supported platinum with a unique structure. The other is to use a heteroatom source to post-treat the carbon material. This method has cumbersome processing steps and a low amount of heteroatom doping.

Method used

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  • Method for loading platinum on heteroatom-doped carbon nanohorn, catalyst and application of catalyst
  • Method for loading platinum on heteroatom-doped carbon nanohorn, catalyst and application of catalyst
  • Method for loading platinum on heteroatom-doped carbon nanohorn, catalyst and application of catalyst

Examples

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Effect test

example 1

[0073] (1) Preparation of heteroatom precursor: Mix sulfur element and graphite powder in a mass ratio of 1:5, and mix for 20 min.

[0074] (2) Preparation of plasma anode: The heteroatom precursor in step (1) is poured into a graphite rod with a hole diameter of 4 mm, and compacted with a rod with a diameter equal to the hole diameter.

[0075] (3) Preparation of heteroatom-doped carbon nanohorns: the anode material in step (2) is placed in a plasma furnace as an anode, a graphite rod with one end sharpened as a cathode, and plasma treatment is performed under a nitrogen atmosphere of 70kPa . The working current is 200A. Finally, stand for 1 h, collect the product, and obtain nitrogen-sulfur atom-doped carbon nanohorns.

[0076] (4) Preparation of heteroatom-doped carbon nanohorns loaded with platinum: disperse the heteroatom-doped carbon nanohorns in 40 ml of ethylene glycol solution, stir for 15 min, and then add 1 ml of 0.05 mol·L -1 chloroplatinate ethylene glycol solu...

example 2

[0079] (1) Preparation of heteroatom precursor: Cetyltrimethylammonium chloride (CATC) and graphite powder were mixed in a mass ratio of 1:3 for 30 min.

[0080] (2) Preparation of plasma anode: The heteroatom precursor in step (1) is poured into a graphite rod with a hole diameter of 3 mm, and compacted with a rod with a diameter equal to the hole diameter.

[0081] (3) Preparation of heteroatom-doped carbon nanohorns: the anode material in step (2) is placed in a plasma furnace as an anode, and a graphite rod sharpened at one end is used as a cathode, and plasma treatment is performed under a nitrogen atmosphere of 80kPa . The working current is 200A. Finally, after standing for 1 h, the product was collected to obtain carbon nanohorn doped with nitrogen and chlorine atoms.

[0082] (4) Preparation of heteroatom-doped carbon nanohorns loaded with platinum: disperse the heteroatom-doped carbon nanohorns in 40 ml of ethylene glycol solution, stir for 10 min, and then add 1 m...

example 3

[0085] (1) Preparation of heteroatom precursor: polyvinylidene fluoride (PVDF) and graphite powder were mixed in a mass ratio of 1:3 for 20 min.

[0086] (2) Preparation of plasma anode: The heteroatom precursor in step (1) is poured into a graphite rod with a hole diameter of 4 mm, and compacted with a rod with a diameter equal to the hole diameter.

[0087] (3) Preparation of heteroatom-doped carbon nanohorns: the anode material in step (2) is placed in a plasma furnace as an anode, a graphite rod with one end sharpened as a cathode, and plasma treatment is performed under a nitrogen atmosphere of 70kPa . The working current is 180A. Finally, it was left to stand for 1 h, and the products were collected to obtain carbon nanohorns co-doped with nitrogen and fluorine atoms.

[0088] (4) Preparation of heteroatom-doped carbon nanohorns loaded with platinum: disperse the heteroatom-doped carbon nanohorns in 40 ml of ethylene glycol solution, stir for 15 min, and then add 0.5 m...

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Abstract

The invention provides a method for loading platinum on heteroatom-doped carbon nanohorns, a catalyst and application of the catalyst. The platinum loading method comprises the following steps: mixing a heteroelement substance and graphite powder in a mass ratio of (1: 3)-(10: 1) for a preset time to obtain a heteroatom precursor; placing the heteroatom precursor into a graphite rod with holes, compacting the heteroatom precursor, and drying the graphite rod for a preset time to obtain a plasma anode; taking a pure graphite rod as a cathode, vertically and oppositely placing the pure graphite rod and the plasma anode in an electric arc furnace, vacuumizing the electric arc furnace, filling buffer gas, starting an electric arc, and reacting for a preset time period to obtain the heteroatom-doped carbon nanohorn; and dispersing the heteroatom-doped carbon nanohorns in a reducing solution, adding platinum salt, uniformly stirring, heating, stirring, carrying out a reduction reaction, centrifuging, washing, and drying to obtain the low-platinum supported catalyst. The preparation method has the advantages that the heteroatom-doped carbon nanomaterial can be used as a carrier, and the high-activity platinum catalyst for the fuel cell is prepared.

Description

technical field [0001] The invention relates to the technical field of preparation of catalytic materials, in particular to a method, catalyst and application of a heteroatom-doped carbon nanohorn supporting platinum. Background technique [0002] Fuel cells have attracted worldwide attention due to their high energy conversion efficiency (40% to 60%), low noise, green environmental protection, sustainable operation, high power density, stable output, and safe operation. In recent years, formic acid is in a liquid state at room temperature, with a low freezing point, non-toxic, and non-flammable. It is suitable for low-temperature work, and is relatively safe. Compared with traditional methanol fuel, formic acid has advantages. In addition, formic acid is a good electrolyte, which is conducive to charge conduction after ionization, has a small contact resistance, and has a higher open circuit voltage than methanol. And it can work at a higher concentration, the actual worki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J27/13B01J35/02B01J37/34B01J37/02
CPCB01J27/24B01J37/349B01J37/0207B01J37/0209B01J37/0203H01M4/921H01M4/926B01J35/393B01J35/23B01J35/33B01J35/40Y02E60/50C01B32/18B01J23/42B01J21/185H01M4/90B01J37/16B01J37/06H01M4/92H01M2008/1095B01J21/18B01J37/08
Inventor 梁风解志鹏张达
Owner KUNMING UNIV OF SCI & TECH
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