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Hollow palladium nanosphere and application of nanosphere in anode catalyst of fuel cell

A hollow nano, sodium borohydride technology, applied in battery electrodes, nanotechnology, nanotechnology and other directions, can solve problems such as restricting the research and development of DMFC, and achieve the effect of simple and easy method, simple preparation method and high activity

Inactive Publication Date: 2015-06-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still intractable problems in direct methanol fuel cell (DMFC), which greatly limits the research and development of DMFC.

Method used

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  • Hollow palladium nanosphere and application of nanosphere in anode catalyst of fuel cell
  • Hollow palladium nanosphere and application of nanosphere in anode catalyst of fuel cell
  • Hollow palladium nanosphere and application of nanosphere in anode catalyst of fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 18mL of prepared 1mg / mL RB aqueous solution, and weigh 5mg Na 2 PdCl 4 Dissolve in 2mL deionized water. Placed at room temperature, under stirring conditions, the Na 2 PdCl 4 The aqueous solution was added dropwise into the RB aqueous solution, and stirring was continued for 30 min after the dropwise addition was completed.

[0037] Prepare 2mg / mL sodium borohydride aqueous solution, take 1mL NaBH 4 Aqueous solution was added dropwise to RB and Na 2 PdCl 4 The mixture was reacted at room temperature for 6h.

[0038] After the reaction, the product was centrifuged and washed with water and ethanol respectively until the chaotrope was colorless to obtain palladium hollow nanospheres.

Embodiment 2

[0040] Take 15mL of prepared 1.2mg / mL RB aqueous solution, and weigh 12.5mg Na 2 PdCl 4 Dissolve in 5mL deionized water. Placed at room temperature, under stirring conditions, the Na 2 PdCl 4 The aqueous solution was added dropwise into the RB aqueous solution, and stirring was continued for 30 min after the dropwise addition was completed.

[0041] Prepare 1mg / mL sodium borohydride aqueous solution, take 4mL NaBH 4 Aqueous solution was added dropwise to RB and Na 2 PdCl 4 The mixture was reacted at room temperature for 8h.

[0042] After the reaction, the product was centrifuged and washed with water and ethanol respectively until the chaotrope was colorless to obtain palladium hollow nanospheres.

Embodiment 3

[0044] Take 9mL of prepared 1.5mg / mL RB aqueous solution, and weigh another 20mg Na 2 PdCl 4 Dissolve in 8 mL deionized water. Placed at room temperature, under stirring conditions, the Na 2 PdCl 4 The aqueous solution was added dropwise into the RB aqueous solution, and stirring was continued for 30 min after the dropwise addition was completed.

[0045] Prepare 2mg / mL sodium borohydride aqueous solution, take 4mL NaBH 4 Aqueous solution was added dropwise to RB and Na 2 PdCl 4 The mixture was reacted at room temperature for 12h.

[0046] After the reaction, the product was centrifuged and washed with water and ethanol respectively until the chaotrope was colorless to obtain palladium hollow nanospheres.

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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a hollow palladium nanosphere prepared by a wet chemical method, and an application of the hollow palladium nanosphere in an anode catalyst of a fuel cell. The hollow palladium nanosphere has the advantages of large specific surface area, high activity and the like. The method comprises the steps that RB (Rubidium) and Na2PdCl4 are mixed together, and combined together by electrostatic interaction to form a compound template; PdCl4<2-> is reduced by NaBH4; a spherical shell stacked by palladium nanoparticles is formed at an outer layer of the RB-PdCl4<2-> compound template; reaction continues; the hollow palladium nanosphere is formed gradually; and RB-PdCl4<2-> disappears due to gradual consumption of PdCl4<2-> simultaneously. The hollow palladium nanosphere serves as the anode catalyst of the fuel cell, and has very high activity and very good stability. The method has the advantages of simplicity in operation, low cost, high performance, easiness in popularization and the like, and can be widely applied in many fields.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a palladium hollow nanosphere prepared by a wet chemical method and its application in fuel cell anode catalysts. Background technique [0002] Today's society belongs to an era of sustainable economic development and continuous technological advancement. Faced with the current severe energy and environmental problems, people pay more and more attention to the development of efficient and clean energy. Fuel cells (Fuel Cells) are a power generation device that directly converts chemical energy present in oxidants and fuels into electrical energy. [0003] Proton exchange membrane fuel cells, which use hydrogen as fuel, were once considered to be very promising fuel cells. However, it has not been industrialized because of problems such as high price and short lifespan. Then, people began to study the replacement of hydrogen with methanol, so people turned to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/92B82Y30/00
CPCY02E60/50
Inventor 卢晓峰杨柳王策
Owner JILIN UNIV