Method for preparing Pt catalyst with carbon carrier as carrier

A technology of catalyst and carbon carrier, applied in the field of preparation of Pt catalyst, can solve the problems of unfriendly environment, dangerous operation, complicated process, etc.

Inactive Publication Date: 2009-12-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above introduction that the process of these methods is relatively complicated, and the operation has certain dangers

Method used

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  • Method for preparing Pt catalyst with carbon carrier as carrier
  • Method for preparing Pt catalyst with carbon carrier as carrier
  • Method for preparing Pt catalyst with carbon carrier as carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Prepare a glucose solution with a concentration of 50g / l.

[0023] 2. Add XC-72 (0.1g) with a concentration of 0.433g / l to the glucose (3g) solution configured above, so that the mass ratio of the two is 30:1, transfer it to the reaction kettle, and react at 160°C for 12h. The composite carrier C / XC-72 of the present invention is obtained by washing the product repeatedly with distilled water.

[0024] 3. Mix the 0.2g composite carrier C / XC-72 and H0.2g prepared above 2 PtCl 6 (10g / l) according to the mass ratio of 1:1, 5mgPVP (0.167g / l) is used as the protective agent, wherein the mass ratio of PVP:C / XC-72 is 1:4, after stirring evenly, heat and reflux for 4h to obtain the catalyst Pt / C / XC-72.

[0025] Electrochemical test results show that the Pt / C / XC-72 exhibits electrocatalytic performance for oxygen reduction, indicating that the composite support successfully self-reduces chloroplatinic acid to Pt catalyst, but the catalytic effect is not obvious. The limi...

Embodiment 2

[0027] 1. Prepare a glucose solution with a concentration of 50g / l.

[0028] 2. Add XC-72 (0.06g) with a concentration of 0.433g / l to the glucose (3g) solution configured above, so that the mass ratio of the two is 50:1, transfer it to the reactor, and react at 160°C for 12h. The composite carrier C / XC-72 of the present invention is obtained by washing the product repeatedly with distilled water.

[0029] 3. Combine the 0.2g composite carrier C / XC-72 prepared above and 0.2g H 2 PtCl 6 (10g / l) according to the mass ratio of 1:1, 5mgPVP (0.167g / l) is used as the protective agent, wherein the mass ratio of PVP:C / XC-72 is 1:4, after stirring evenly, heat and reflux for 4h to obtain the catalyst Pt / C / XC-72.

[0030] The results of electrochemical tests show that the Pt / C / XC-72 exhibits electrocatalytic performance for oxygen reduction, indicating that the composite support successfully self-reduces chloroplatinic acid to Pt catalyst, and the catalytic effect is enhanced. The l...

Embodiment 3

[0032] 1. Prepare a glucose solution with a concentration of 50g / l.

[0033] 2. Add XC-72 (0.02g) with a concentration of 0.433g / l to the glucose (3g) solution configured above, so that the mass ratio of the two is 100:1, transfer it to the reaction kettle, and react at 160°C for 12h. The composite carrier C / XC-72 of the present invention is obtained by washing the product repeatedly with distilled water.

[0034] 3. Combine the 0.2g composite carrier C / XC-72 prepared above and 0.2g H 2 PtCl 6 (10g / l) according to the mass ratio of 1:1, 5mgPVP (0.167g / l) is used as the protective agent, wherein the mass ratio of PVP:C / XC-72 is 1:4, after stirring evenly, heat and reflux for 4h to obtain the catalyst Pt / C / XC-72.

[0035] Electrochemical test results show that the Pt / C / XC-72 exhibits electrocatalytic performance for oxygen reduction, indicating that the composite carrier successfully self-reduces chloroplatinic acid to Pt catalyst, but the catalytic effect is mediocre, and t...

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Abstract

The invention belongs to the technical field of fuel cell. The invention relates to a method for preparing a Pt catalyst with a carbon carrier as a carrier, comprising the following steps: preparing glucose solution with concentration being 50g/l, adding XC-72 with the concentration being 0.433-1.677g/l to the glucose solution so that the mass ratio of the two can be 30-100, switching the mixture into a reaction kettle to react for 12h at the temperature of 160 DEG C, and rinsing the product repeatedly and cleanly with distilled water to obtain the composite carrier C/XC-72; mixing the prepared composite carrier C/XC-72 and H2PtCl6 with the concentration being 10g/l according to mass ratio of 0.5-2, adding polyvinylpyrrolidone as protective agent with the mass ratio of polyvinylpyrrolidone to C/XC-72 being 1:4, stirring uniformly followed by heating and refluxing for 4h to obtain catalyst Pt/C/XC-72. The invention can realize self reduction by the characteristic of carrier C/XC-72, reduce Pt metal salt into Pt nano particles and have good electro-catalysis performance for oxygen reduction.

Description

technical field [0001] The invention relates to a preparation method for a direct methanol fuel cell cathode oxygen reduction carbon carrier and a Pt catalyst using the carrier as a carrier, and belongs to the technical field of fuel cell material science and electrocatalysis. Background technique [0002] Direct methanol fuel cell (DMFC) is a new type of proton exchange membrane fuel cell with polymer membrane as electrolyte, which is developed on the basis of proton exchange membrane fuel cell. DMFC is composed of methanol anode, oxygen cathode and proton exchange membrane. Commonly used anode and cathode electrode catalysts are PtRu / C and Pt / C noble metal catalysts, respectively. The reversibility of the cathode oxygen reduction reaction is very small, and the theoretical potential of the 4-electron reduction reaction is 1.23V. However, even if the surface of the oxygen electrode catalyst such as noble metal Pt and Pd is used, the overpotential is about 0.2V in the open ...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J37/04H01M4/92
CPCY02E60/50
Inventor 张丽娟田瑞丽胡朴夏定国
Owner BEIJING UNIV OF TECH
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