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Nano porous alloy fuel battery catalyst and preparation method thereof

A nanoporous, fuel cell technology, applied in the fields of nanomaterials and electrochemistry, to achieve the effects of reducing usage, changing reaction paths, and mild preparation conditions

Inactive Publication Date: 2012-10-24
济南美高纳米材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] After searching, there is no report on the method of preparing nanoporous alloy catalysts by the direct displacement reaction of alloys and inert metal ions

Method used

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  • Nano porous alloy fuel battery catalyst and preparation method thereof
  • Nano porous alloy fuel battery catalyst and preparation method thereof
  • Nano porous alloy fuel battery catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) 9K (37.5% by weight of gold) commercial gold-silver alloy foil with a length of 1 cm, a width of 1 cm, and a thickness of 100 nm was transferred to 5 mmol / L H 2 PtCl 6 Medium, room temperature (15 ℃) corrosion 10h;

[0033] (2) The corroded sample was washed in ammonia water with a concentration of 14mol / L for 5 minutes to wash away AgCl precipitation;

[0034] (3) then be 67% HNO at weight percent concentration 3 Corroded in the solution for 5 minutes, washed with deionized water for 5 times, each time for 5 minutes, a nanoporous platinum alloy fuel cell catalyst was prepared, and its SEM photo is as follows: figure 1 As shown, it shows that the pore size and the thickness of the pore wall are relatively uniform, both in 6-8nm, and the weight percentage of gold in the catalyst is 90%, the weight percentage of platinum is 5%, and the weight percentage of silver is 5%.

Embodiment 2

[0036] (1) 9K commercial gold-silver alloy foil with a length of 2 cm, a width of 2 cm, and a thickness of 100 nm was transferred to 5 mmol / L H 2 PtCl 6 Medium, room temperature (15 ℃) corrosion 10h;

[0037] (2) The corroded sample was washed in ammonia water with a concentration of 14mol / L for 5min to wash away AgCl precipitation, and then washed with deionized water for 5 times, each time for 5min, to prepare a nanoporous platinum alloy fuel cell catalyst, and its cyclic voltammetry curve Such as figure 2 , 3 , 4, and 5. SEM photographs show that the pore size and pore wall thickness are relatively uniform, both in the range of 6-8nm. The weight percentage of gold in the catalyst is 87%, the weight percentage of silver is 7%, and the weight percentage of platinum is 6%.

Embodiment 3

[0039] (1) 9K commercial gold-silver alloy foil with a length of 2cm, a width of 2cm, and a thickness of 100nm was transferred to 10mmol / L H 2 PtCl 6 medium, 30°C corrosion for 2h;

[0040] (2) The corroded sample was washed in ammonia water with a concentration of 10mol / L for 10min to wash away AgCl precipitation;

[0041] (3) then in weight percent concentration be 55% HNO 3 Corroded in the solution for 10 minutes, washed with deionized water for 8 times, each time for 8 minutes, to prepare a nanoporous platinum alloy fuel cell catalyst.

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Abstract

The invention discloses a nano porous alloy fuel battery catalyst and a preparation method thereof. The method is simple and convenient, and directly prepares nano porous alloy fuel battery catalyst by gold-silver alloy foils and inert metal irons. The nano porous alloy fuel battery catalyst has good catalytic activity to oxidize formic acid, contains little platinum, has high poisoning resistance and stability, and is suitable for the field of fuel battery catalyzing.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and relates to a high-efficiency catalyst which can be used in hydrogen-oxygen, methanol, formic acid, ethanol and other fuel cells and a preparation method thereof, in particular to a nanoporous structure, low platinum loading, high A direct formic acid fuel cell catalyst with anti-poisoning performance and high stability. Background technique [0002] A fuel cell is a device that converts chemical energy into electrical energy. Due to its high energy conversion efficiency and non-pollution characteristics, it is increasingly favored by governments, enterprises and scientific research institutions in today's environment where environmental pollution and energy crises are increasingly threatening human existence. Pay attention to. In a hydrogen-oxygen fuel cell, the fuel molecular hydrogen at the anode is decomposed under the action of the catalyst, the generated proto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88B01J23/52B01J35/10B01J37/30
CPCY02E60/50
Inventor 丁轶王荣跃侯超豪
Owner 济南美高纳米材料有限公司
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