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Nickelous chloride assisted synthesis method of fuel cell catalyst carrier ordered mesoporous carbon

A technology of catalyst carrier and fuel cell, which is applied in the direction of catalyst carrier, physical/chemical process catalyst, chemical instrument and method, etc. It can solve the problems that carbon particles cannot be infiltrated, the loading rate is low, and the electrocatalytic performance of Pt nanoparticles is weakened.

Inactive Publication Date: 2009-07-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this ordered mesoporous carbon is used as a fuel cell catalyst carrier, the carbon particles cannot be completely infiltrated by distilled water, and it is still difficult to disperse even under magnetic stirring or ultrasonic oscillation, and particles always settle at the bottom of the beaker during the whole process
The hydrophobic properties of such carbon particles lead to the obvious agglomeration of Pt nanoparticles, and even the loading rate is extremely low, thus weakening the electrocatalytic performance of Pt nanoparticles.

Method used

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  • Nickelous chloride assisted synthesis method of fuel cell catalyst carrier ordered mesoporous carbon
  • Nickelous chloride assisted synthesis method of fuel cell catalyst carrier ordered mesoporous carbon
  • Nickelous chloride assisted synthesis method of fuel cell catalyst carrier ordered mesoporous carbon

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Experimental program
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Effect test

specific Embodiment 1

[0011] (1) Add nickel chloride solution on the basis of soft template self-assembly method. That is: 1.0 g of surfactant Pluronic F127 (polyoxyethylene-polyoxypropylene-polyoxyethylene block copolymer) was dissolved in 10.0 g of absolute ethanol, and stirred to form a transparent solution. Add 3.0mL, 0.2mol·L -1 Nickel chloride solution was stirred at 40°C for 1 h. Slowly add 2.08g tetraethyl orthosilicate and 2.5g ethanol solution (20%) of phenolic resin dropwise, stir for 2h to make it evenly mixed.

[0012] (2) Transfer the mixture to a flat-bottomed evaporating dish, evaporate the solvent at room temperature (25°C) for 5-8 hours, put it in a vacuum drying oven at 100°C for thermal polymerization for 24 hours, and form a soft film.

[0013] (3) Carbonization is carried out in an atmosphere tube furnace with nitrogen gas flow. Insulate at 900°C for 2 hours, and the heating rate is strictly controlled at 1°C·min -1 , that is, ordered mesoporous carbon-silicon oxide compos...

specific Embodiment 2

[0018] Specific embodiment two (comparative example):

[0019] (1) Dissolve 1.0 g of surfactant F127 in 10.0 g of absolute ethanol, and stir to form a transparent solution. Without adding nickel chloride solution, stirring was continued at 40°C for 1h. Slowly add 2.08g tetraethyl orthosilicate and 2.5g ethanol solution (20%) of phenolic resin dropwise, stir for 2h to make it evenly mixed.

[0020] (2) Transfer the mixture to a flat-bottomed evaporating dish, evaporate the solvent at room temperature (25°C) for 5-8 hours, put it in a vacuum drying oven at 100°C for thermal polymerization for 24 hours, and form a soft film.

[0021] (3) Carbonization is carried out in an atmosphere tube furnace with nitrogen gas flow. Insulate at 900°C for 2 hours, and the heating rate is strictly controlled at 1°C·min -1 , that is, ordered mesoporous carbon-silicon oxide composites.

[0022] (4) Soak the carbonized and ground sample with a mixed solution of NaOH, ethanol and water (mass rat...

specific Embodiment 3

[0026] (1) Add nickel chloride solution on the basis of soft template self-assembly method. Namely: Dissolve 1.0 g of template agent F127 in 10.0 g of absolute ethanol and stir to form a transparent solution. Add 4.0mL, 0.2mol·L -1 Nickel chloride solution was stirred at 40°C for 1 h. Slowly add 2.08g tetraethyl orthosilicate and 2.5g ethanol solution (20%) of phenolic resin dropwise, stir for 2h to make it evenly mixed.

[0027] (2) Transfer the mixture to a flat-bottomed evaporating dish, evaporate the solvent at room temperature (25°C) for 5-8 hours, put it in a vacuum drying oven at 100°C for thermal polymerization for 24 hours, and form a soft film.

[0028] (3) Carbonization is carried out in an atmosphere tube furnace with nitrogen gas flow. Insulate at 900°C for 2 hours, and the heating rate is strictly controlled at 1°C·min -1 , that is, ordered mesoporous carbon-silicon oxide composites.

[0029] (4) Soak the carbonized and ground sample with a mixed solution of...

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Abstract

The invention relates to a method for the nickel chloride-aided synthesis of fuel cell catalyst carrier ordered mesoporous carbon, which belongs to a preparation process of a direct methanol fuel cell catalyst. The method can produce carbon-carried Pt catalyst with excellent performance by adopting in-situ carbon thermal reduction technique and a unique binary metal loading method and is applicable to oxyhydrogen proton exchange membrane fuel cells and direct methanol fuel cells. The method produces a binary electrocatalyst by using a metal chloride as an additive, synthesizing the ordered mesoporous carbon with a modified soft template self-assembly method, forming a metal nanocrystal through carbon thermal reduction, and loading Pt nano particles with a microwave heating glycol reduction method. The catalyst has excellent electrocatalysis performance and substantially increases the catalytic activity and utilization rate of Pt, thereby having enormous application prospect.

Description

technical field [0001] The present invention relates to a method for preparing ordered mesoporous carbon used for proton exchange membrane fuel cell catalyst carrier. Carbon-supported Pt series catalysts with excellent performance can be prepared by using in-situ carbothermal reduction technology and unique binary metal loading method, which can be used in hydrogen-oxygen proton exchange membrane fuel cells and direct methanol fuel cells. technical background [0002] Platinum or platinum-based alloys supported on carbon are commonly used electrocatalysts in proton exchange membrane fuel cells (PEMFC). In order to reduce the amount of platinum and improve the utilization rate of platinum, there are usually two ways: one is to add one or several metal promoters to Pt to obtain a binary or multi-component catalyst. The second is to use some carriers with high specific surface area, such as carbon black, carbon aerogel, carbon nanotubes or ordered mesoporous carbon. Ordered m...

Claims

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Application Information

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IPC IPC(8): B01J32/00H01M4/92
CPCY02E60/50
Inventor 周建华何建平王涛孙盾
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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