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Fuel cell catalyst taking carbon-coated conductive ceramics as supporter and preparation method thereof

A technology of fuel cells and conductive ceramics, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as proton exchange membrane fuel cell catalysts that have not yet been reported, and achieve high electrochemical active area, electrochemical stability, and high conductivity Performance and Chemical Stability, Effect of High Methanol Formic Acid Oxidation Ability

Inactive Publication Date: 2011-06-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, there are no reports on proton exchange membrane fuel cell catalysts based on carbon-coated conductive ceramics.

Method used

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  • Fuel cell catalyst taking carbon-coated conductive ceramics as supporter and preparation method thereof
  • Fuel cell catalyst taking carbon-coated conductive ceramics as supporter and preparation method thereof
  • Fuel cell catalyst taking carbon-coated conductive ceramics as supporter and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Get 280 milligrams of silicon carbide nano-ceramics whose average particle diameter is 40 nanometers, join in the mixed solution of 20 milliliters of dehydrated alcohol and water, the mass ratio of dehydrated alcohol and water is 1: 1, ultrasonic (R-S150 ultrasonic Cell pulverizer) dispersed for 5 minutes, then added 4 milliliters of aniline solution with a mass concentration of 90% in the mixed solution, fully stirred, then added 2 grams of sodium persulfate, and 20 milliliters of hydrochloric acid solution with a concentration of 1 mol / liter. Stir continuously at 10°C for 8 hours, filter and wash with alcohol to obtain a polyaniline-modified silicon carbide conductive ceramic. Put the sample into the tube atmosphere furnace, first pass N2 The air was removed for half an hour, and then the temperature was programmed to rise to 800° C. for 2 hours for carbonization to obtain carbon-coated silicon carbide ceramics. The as-prepared carbon-coated SiC ceramic samples were m...

Embodiment 2

[0038] Get 280 milligrams of titanium dioxide nano-ceramics whose average particle diameter is 40 nanometers, join in the mixed solution of 20 milliliters of dehydrated alcohol and water, the mass ratio of dehydrated alcohol and water is 1: 1, ultrasonic (R-S150 ultrasonic cell Disintegrator) for 5 minutes, then add 4 milliliters of polycarbonate solution with a mass concentration of 35% to the mixed solution, continue stirring for 8 hours at 80-90°C, filter and wash with alcohol to obtain a polycarbonate-modified conductive ceramics. Put the sample into the tube atmosphere furnace, first pass N 2 The air was removed for half an hour, and then the temperature was programmed to rise to 800°C for 2 hours for carbonization to obtain carbon-coated titanium dioxide ceramics. Prepare the sample with 1.4 mg / ml PdCl in concentrated HCl 2 50 ml of the solution is mixed with 150 ml of ethylene glycol, and the 2 Stir fully under protection for 10-20 minutes to form a uniform mixed sol...

Embodiment 3

[0042] Get 280 milligrams of titanium nitride nano-ceramics whose average particle diameter is 60 nanometers, join in the mixed solution of 20 milliliters of dehydrated alcohol and water, the mass ratio of dehydrated alcohol and water is 1: 1, ultrasonic (R-S150 Ultrasonic cell pulverizer) disperse for 5 minutes, then add 4 milliliters of sucrose solution with a mass concentration of 25% to the mixed solution, continue stirring for 8 hours at 80-90° C., filter and wash with alcohol to obtain sucrose-modified titanium nitride conductive ceramics. Put the sample into the tube atmosphere furnace, first pass N 2 The air was removed for half an hour, and then the temperature was programmed to rise to 800° C. for 2 hours for carbonization to obtain carbon-coated titanium nitride ceramics. The prepared sample was mixed with 50 mL of 1.4 mg / mL HO 2 PtCl 6 ·6H 2 A solution mixed in O, in N 2 Stir fully under protection for 10-20 minutes to form a uniform mixed solution, then add 2...

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Abstract

The invention relates to a fuel cell catalyst taking carbon-coated conductive ceramics as a supporter and a preparation method thereof, and the fuel cell catalyst is characterized in that the carbon-coated conductive ceramics is taken as the supporter of the fuel cell catalyst. Compared with the traditional catalyst adopting a carbon supporter, the catalyst adopts the carbon-coated conductive ceramics as the supporter, thereby having higher electrochemical active surface and higher anti-oxidation performance; compared with the ordinary ceramic supporter, the supporter of the catalyst has higher conductive performance; compared with the catalyst adopting the ceramic supporter, the catalyst has higher electrochemical active area. The preparation method of the catalyst comprises the following steps: pre-preparing the organic polymer-coated conductive ceramics, performing high-temperature treatment for carbonizing an organic polymer and preparing the carbon-coated conductive ceramic supporter, and then loading catalyst metal particles on the surface of the carbon-coated conductive ceramic supporter. The prepared catalyst is prepared into a fuel cell MEA (membrane electrode assembly) with better electrical output performance and cell stability.

Description

technical field [0001] The invention relates to a catalyst, especially a catalyst used in a fuel cell, which is characterized in that the carrier used in the catalyst is a carbon-coated conductive ceramic, and the carrier not only has the chemical stability and oxidation resistance of the conductive ceramic, but also has the high carbon material The characteristics of conductivity. The invention also relates to a preparation method of the catalyst. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC), as a kind of clean energy with high working efficiency, environmental friendliness and fast start-up at room temperature, has become one of the research hotspots in the field of energy. For its research, most of the work focuses on improving performance, reducing costs and improving durability. Among them, the durability of PEMFC is a major bottleneck hindering its commercialization. This is because the catalyst mainly uses a Pt noble metal catalyst, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88
CPCY02E60/50
Inventor 木士春吕海峰
Owner WUHAN UNIV OF TECH