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Method for prepn. of electrode catalyst contg. platinum carried on carbon nanometer tube

A technology of carbon nanotubes and catalysts, which is applied in the field of preparation of proton exchange membrane fuel cells and direct methanol proton exchange membrane fuel cells, and electrode catalysts, and can solve the problems of high production costs

Inactive Publication Date: 2004-08-11
BEIJING JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Proton exchange membrane fuel cells are widely used in the power supply of electric vehicles and various mobile power sources, which are highly valued by various countries. There have been prototypes at home and abroad, but the biggest obstacle restricting its commercialization is the high production cost, including electrode catalysts, proton exchange membranes, etc. and bipolar plates in three ways

Method used

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  • Method for prepn. of electrode catalyst contg. platinum carried on carbon nanometer tube
  • Method for prepn. of electrode catalyst contg. platinum carried on carbon nanometer tube
  • Method for prepn. of electrode catalyst contg. platinum carried on carbon nanometer tube

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Embodiment 1

[0028] 1. Carbon nanotube activation treatment

[0029] (1) Water washing: put carbon nanotubes into a round bottom flask, moisten with absolute ethanol, then add a certain amount of double distilled water, heat to boil, reflux for 1 hour, filter, and dry at 80°C for 2 hours to obtain water-washed activated carbon nanotube samples.

[0030] (2) pickling: soak the water-washed activated carbon nanotube sample with 10% hydrochloric acid for 10 hours, reflux for 1h, filter, and wash with water until there is no Cl - Dry at 80°C for 2 hours.

[0031] 2. Preparation of Pt / CNTs catalyst

[0032] (1) Weigh 1.5068 grams of activated carbon nanotubes, add them to a round bottom flask, add a certain amount of absolute ethanol dropwise to moisten, then add 80 mL of double distilled water, and stir for 5 minutes;

[0033] (2) Add the prepared chloroplatinic acid solution (1 gram of chloroplatinic acid dissolved in 20 mL of twice distilled water) to the above carbon nanotube solution an...

Embodiment 2

[0037] 1. Activation treatment of carbon nanotubes (provided by the Department of Chemical Engineering, Tsinghua University)

[0038] (1) Water washing: put carbon nanotubes into a round bottom flask, moisten with absolute ethanol, then add a certain amount of double distilled water, heat to boil, reflux for 1 hour, filter, and dry at 80°C for 2 hours to obtain water-washed activated carbon nanotubes sample.

[0039] (2) Pickling: soak the water-washed activated carbon nanotube sample with 10% hydrochloric acid for 10 h, reflux for 1 h, filter, and wash with water until there is no Cl - Dry at 80°C for 2 hours.

[0040] 2. Preparation of Pt / CNTs catalyst

[0041] (1) Weigh 0.5651 g of activated carbon nanotubes and place them in a round bottom flask, add an appropriate amount of absolute ethanol dropwise to moisten, add 100 mL of double distilled water, and stir for 5 min;

[0042] (2) Add the prepared chloroplatinic acid solution (1 gram of chloroplatinic acid dissolved in...

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Abstract

The present invention relates to a preparation method of Pt / CNT electrode catalyst carried by carbon nano tube. It is characterized by that the carbon nano tube can be used as carrier, a light-catalyzed in-situ chemical reduction precipitation method is utilized, and the ethylalcohol (or formaldehyde) can be used as reduction agent, and the chloroplatinic acid can be reduced and deposited on the activated carbon nano tube so as to obtain the invented Pt / CNTs catalyst with high activity for proton, exchange membrane fuel cell direct methyl alcohol fuel cell. As compared with existent electrode catalyst said invention features large specific surface area, high porosity, good dispersion property and low platinum use level.

Description

1. Technical field [0001] The invention relates to a preparation method of an electrode catalyst for proton exchange membrane fuel cells and methanol fuel cells, belongs to the technical field of catalyst manufacture, and is mainly used for proton exchange membrane fuel cells and direct methanol proton exchange membrane fuel cells. 2. Technical Background [0002] Proton exchange membrane fuel cells are widely used in the power supply of electric vehicles and various mobile power sources, which are highly valued by various countries. There have been prototypes at home and abroad, but the biggest obstacle restricting its commercialization is the high cost of production, including electrode catalysts, proton exchange membranes And bipolar plates and other three aspects. In terms of reducing the cost of electrode fabrication, it is mainly to prepare a highly dispersed carbon-supported platinum (Pt / C) catalyst to improve the utilization rate of Pt and greatly reduce the amount o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/42B01J37/02H01M4/88H01M4/92
CPCY02E60/50
Inventor 朱红孙正贵申阎春
Owner BEIJING JIAOTONG UNIV
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