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Carbon, silver-copper and polyaniline composite electro-catalyst for oxygen reduction reaction of fuel cell and preparation method and application of electro-catalyst

An electrocatalyst, fuel cell technology, applied in organic compound/hydride/coordination complex catalysts, battery electrodes, chemical instruments and methods, etc., can solve problems such as weak activity

Inactive Publication Date: 2012-11-21
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research and application show that the activity of Ag on ORR is weaker than that of Pt. As a cathode material for alkaline fuel cells, Ag cannot replace Pt.

Method used

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  • Carbon, silver-copper and polyaniline composite electro-catalyst for oxygen reduction reaction of fuel cell and preparation method and application of electro-catalyst
  • Carbon, silver-copper and polyaniline composite electro-catalyst for oxygen reduction reaction of fuel cell and preparation method and application of electro-catalyst
  • Carbon, silver-copper and polyaniline composite electro-catalyst for oxygen reduction reaction of fuel cell and preparation method and application of electro-catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] AgNO at a concentration of 8 mM 3 50 mL of ethanol solution, and 2 mM Cu(NO 3 ) 2 ·3H 2 50 mL of O ethanol solution was placed in a hydrothermal reaction kettle, 75 mg of Vulcan XC-72 carbon powder was added, and ultrasonic treatment was performed at room temperature for 5 min; then, 50 mL of 0.5 M NaOH ethanol solution was slowly added to the In the above-mentioned hydrothermal reaction kettle, the addition is completed, and the ultrasonic treatment is performed for 20 minutes; then the reaction kettle is heated to 200 o Keep 0.5 hour after C; After the reaction is completed, the reactor is cooled to room temperature, and the reaction solution is filtered, and the gained nano-catalyst particles are washed twice with pure water and absolute ethanol successively to obtain the carbon-supported silver-copper binary nano-metal catalyst; The carbon-supported silver-copper binary nano-metal catalyst was mixed with 1 ml of 8 mM aniline hydrochloric acid solution, and after ...

Embodiment 2

[0025] AgNO at a concentration of 8 mM 3 50 mL of ethanol solution, and 8 mM Cu(NO 3 ) 2 ·3H 2 50 mL of O ethanol solution was placed in a hydrothermal reaction kettle, 90 mg of Vulcan XC-72 carbon powder was added, and then ultrasonic treatment was performed at room temperature for 20 min; then, 15 mL of 2 M NaOH ethanol solution was slowly added to the In the above-mentioned hydrothermal reaction kettle, the addition is completed, and the ultrasonic treatment is performed for 20 minutes; then the reaction kettle is heated to 180 o Keep 2 hours after C; After the reaction is completed, the reactor is cooled to room temperature, and the reaction solution is filtered, and the gained nano-catalyst particles are washed twice with pure water and dehydrated alcohol successively to obtain the carbon-supported silver-copper binary nano-metal catalyst; The carbon-supported silver-copper binary nano-metal catalyst was mixed with 10 ml of 2 mM aniline hydrochloric acid solution, and ...

Embodiment 3

[0027] AgNO at a concentration of 6 mM 3 50 mL of ethanol solution, and a concentration of 4 mM Cu(NO 3 ) 2 ·3H 2 50 mL of O ethanol solution was placed in a hydrothermal reaction kettle, 80 mg of Vulcan XC-72 carbon powder was added, and then ultrasonic treatment was carried out at room temperature for 10 min; then, 20 mL of 1 M NaOH ethanol solution was slowly added to the In the above-mentioned hydrothermal reaction kettle, the addition is completed, and the ultrasonic treatment is performed for 10 minutes; then the reaction kettle is heated to 150 o Keep 5 hours after C; After the reaction is completed, the reaction kettle is cooled to room temperature, and the reaction solution is filtered, and the gained nano-catalyst particles are washed twice with pure water and absolute ethanol successively to obtain the carbon-supported silver-copper binary nano-metal catalyst; The carbon-supported silver-copper binary nano-metal catalyst was mixed with 6 ml of 4 mM aniline hydroc...

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Abstract

A preparation method of a carbon, silver-copper and polyaniline composite electro-catalyst for oxygen reduction reaction of a fuel cell includes using ethanol as solution and a reducing agent; simultaneously depositing silver nanoparticles and copper nanoparticles on carbon particles by a hydrothermal method to form a carbon-supported silver-copper bimetal nanometer catalyst; and then decorating the particle surface of the catalyst by polyaniline by a chemical method to obtain the carbon, silver-copper and polyaniline composite electro-catalyst. Anhydrous ethanol and Nafion solution are added into the carbon, silver-copper and polyaniline composite electro-catalyst to prepare a corresponding carbon, silver-copper and polyaniline composite electro-catalyst electrode. The carbon, silver-copper and polyaniline composite electro-catalyst is high in electro-catalytic activity in oxygen reduction reaction, oxygen reduction reaction initial potential is 0.160V [vs SHE (versus a standard hydrogen electrode)], and current density is 1.50mAcm<-2> at -0.15V (vs SHE). In addition, the preparation method is simple, the structure of the electro-catalyst is stable, usage of silver which is precious metal is greatly reduced, and the electro-catalyst is widely applied to fuel cells.

Description

technical field [0001] The invention belongs to the technical field of fuel cell technology and new energy materials, and specifically relates to a preparation method of a carbon-supported silver-copper-polyaniline composite electrocatalyst and its product and application. Background technique [0002] Direct fuel cells have been used in various practical applications such as electric vehicles, portable printers, and stationary electronic devices as an environmentally friendly, inexpensive, and efficient energy source. A typical fuel cell consists of two electrodes, the anode oxidizes fuel molecules (such as hydrogen, methanol, and formic acid, etc.) and the cathode where oxygen reduction reaction (ORR) occurs. However, the cathodic reaction has a high overpotential, which is caused by the slow kinetic reaction. Oxygen reduction reaction (ORR) is an important cathode process in proton exchange membrane fuel cells (PEMFC). At present, metal catalysts have been widely used in...

Claims

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Application Information

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IPC IPC(8): B01J31/28H01M4/90
CPCY02E60/50
Inventor 易清风唐梅香孙丽枝张玉晖肖兴中
Owner HUNAN UNIV OF SCI & TECH
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