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Method for preparing electrode catalyst of Nano particles of metal platinum under load of Nano carbon cage with thin wall

A carbon nanocages, metal-loaded technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the difficulty of carbon nanocages to ensure the degree of graphitization and the Specific surface area and other issues, to achieve the effects of low cost, high chemical stability, and easy operation

Inactive Publication Date: 2007-10-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention adopts the thin-walled carbon nanocage prepared by heat treatment as the catalyst carrier, the heat treatment ensures the degree of graphitization, and at the same time, the thin-walled structure ensures a high specific surface area, which solves the problem that the carbon nanocage is difficult to guarantee the degree of graphitization and the specific surface area at the same time; alcohol is used as the As a reducing agent, chloroplatinic acid is directly reduced and deposited on the activated thin-walled carbon nanocages to prepare metals loaded on thin-walled carbon nanocages with good dispersion and high catalytic activity, which can be used in proton exchange membrane fuel cells Platinum Nanoparticle Catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Thin-walled carbon nanocages prepared by heat treatment:

[0024] Put the iron-carbon mixed precursor prepared by catalytic decomposition of carbonyl iron and acetylene at 700°C in a long ceramic test tube, and insert the long test tube directly into a resistance furnace that reaches the set reaction temperature of 1350°C. The reaction time is 2 hours, and finally cooled with the furnace .

[0025] 2. Purification and activation of thin-walled carbon nanocages

[0026] Pickling: suspend and disperse thin-walled carbon nanocages in dilute nitric acid for 6 hours, filter, wash thoroughly with deionized water, and dry at 100°C.

[0027] Place the dried sample in the air, and heat and oxidize it at 300°C for 0.5h.

[0028] 3. Preparation of thin-walled carbon nanocages as catalysts supporting metal platinum nanoparticles

[0029] The deposition amount of platinum on the carrier is controlled to be 20% by raw material ratio. That is, put 0.28 g of the treated thin-wal...

Embodiment 2

[0033] 1. Thin-walled carbon nanocages prepared by heat treatment:

[0034] The iron-carbon mixed precursor prepared by catalytic decomposition of carbonyl iron and acetylene at 700°C is placed in a long ceramic test tube, and the long test tube is directly inserted into a resistance furnace that reaches the set reaction temperature of 1150°C. The reaction time is 0.5 hours, and finally cooled with the furnace .

[0035] 2. Purification and activation of thin-walled carbon nanocages

[0036] Pickling: suspend and disperse the thin-walled carbon nanocages in dilute nitric acid and reflux for 4 hours, filter, wash thoroughly with deionized water, and dry at 100°C.

[0037] Put the dried sample in the air, heat and oxidize it at 250°C for 0.5h.

[0038] 3. Preparation of thin-walled carbon nanocages as catalysts supporting metal platinum nanoparticles

[0039] The deposition amount of platinum on the carrier is controlled to be 40% by raw material ratio. That is, put 0.28 g o...

Embodiment 3

[0043] 1. Thin-walled carbon nanocages prepared by heat treatment:

[0044] Put the iron-carbon mixed precursor prepared by catalytic decomposition of carbonyl iron and acetylene at 700°C in a long ceramic test tube, and insert the long test tube directly into a resistance furnace that reaches the set reaction temperature of 1000°C. The reaction time is 1 hour, and finally cooled with the furnace .

[0045] 2. Purification and activation of thin-walled carbon nanocages

[0046] Pickling: suspend and disperse the thin-walled carbon nanocages in dilute nitric acid and reflux for 3 hours, filter, wash thoroughly with deionized water, and dry at 100°C.

[0047] Put the dried sample in the air, heat and oxidize it at 200°C for 0.5h.

[0048] 3. Preparation of thin-walled carbon nanocages as catalysts supporting metal platinum nanoparticles

[0049]The deposition amount of platinum on the carrier is controlled to be 50% by raw material ratio. That is, put 0.28 g of the treated t...

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PUM

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Abstract

An electrode catalyst consisting of the thin-wall carbon nanocages as carrier and Pt nanoparticles and with high electric catalytic activity is prepared through, adding the Fe-C mixture as precursor into a long ceramic test tube, heating in as electric resistance furnace, reacting to generate thin-wall carbon nanocages, cooling, dispersing them in the diluted nitric acid, refluxing, filtering, baking, heating in air for oxidizing, adding alcohol, ultrasonic dispersing, heating by oil bath, pumping chloro-platinic acid to it by peristaltic pump, reacting, and filtering.

Description

technical field [0001] The invention relates to a preparation method in the technical field of low-temperature fuel cells, in particular to a preparation method of a metal platinum nanoparticle electrode catalyst supported by a thin-walled carbon nanocage. Background technique [0002] Low temperature fuel cells include proton exchange membrane and direct methanol fuel cells. The working temperature of low-temperature fuel cells is close to room temperature, and it is widely used in civilian fields. There have been research and application of electric vehicles powered by hydrogen fuel cells at home and abroad. At the same time, the energy used by the low-temperature fuel cell comes from hydrogen or methanol, which belongs to clean energy and protects the environment. However, there are currently problems such as the high cost of low-temperature fuel cells and the utilization rate of fuels that need to be further improved. One of the keys to solve the above problems is to d...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J21/18H01M4/92
CPCY02E60/50
Inventor 盛赵旻王健农
Owner SHANGHAI JIAO TONG UNIV
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