Tripod shaped platinum palladium copper alloy catalyst capable of catalyzing oxygen reduction reaction, and preparation method thereof

A tripod and catalyst technology, applied in the field of tripod-shaped platinum-palladium-copper alloy catalyst and preparation thereof, can solve the problems of less reports of platinum-based tripods and the like, and achieve the effects of high yield, mild reaction conditions, outstanding activity and stability

Inactive Publication Date: 2019-02-26
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Platinum-based tripods with c...

Method used

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  • Tripod shaped platinum palladium copper alloy catalyst capable of catalyzing oxygen reduction reaction, and preparation method thereof
  • Tripod shaped platinum palladium copper alloy catalyst capable of catalyzing oxygen reduction reaction, and preparation method thereof
  • Tripod shaped platinum palladium copper alloy catalyst capable of catalyzing oxygen reduction reaction, and preparation method thereof

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Embodiment 1

[0041] A preparation method of a tripod-shaped platinum-palladium-copper alloy catalyst for catalyzing oxygen reduction reaction, the method comprises the following steps:

[0042] 1) prepare the sodium chloropalladate, chloroplatinic acid and cupric chloride solution that concentration is 20mM respectively, and concentration is that the hydrochloric acid solution of 6M and the ascorbic acid solution that concentration is 0.1M;

[0043] 2) get 2.5mL sodium chloropalladate, 1mL chloroplatinic acid and 1mL cupric chloride solution and mix respectively, then add 0.2mL hydrochloric acid solution, then add 200mg potassium bromide and 50mg F127, ultrasonically mix; Finally, add 2mL ascorbic acid solution again , ultrasonic mixing for 20 minutes;

[0044] 3) After the solution is fully mixed, it is placed in an oil bath and heated to between 95° C., and after 3 hours of reaction, washed, centrifuged and dried to obtain a platinum-palladium-copper tripod-shaped oxygen reduction cataly...

Embodiment 2

[0048] A preparation method of a tripod-shaped platinum-palladium-copper alloy catalyst for catalyzing oxygen reduction reaction, the method comprises the following steps:

[0049] 1) prepare the sodium chloropalladate, chloroplatinic acid and cupric chloride solution that concentration is 20mM respectively, and concentration is that the hydrochloric acid solution of 6M and the ascorbic acid solution that concentration is 0.1M;

[0050] 2) Take 3 mL of sodium chloropalladate, 0.75 mL of chloroplatinic acid and 0.75 mL of cupric chloride solution and mix, then add 0.2 mL of hydrochloric acid solution, then add 200 mg of potassium bromide and 50 mg of F127, and ultrasonically mix evenly. Finally, 2 mL of ascorbic acid solution was added, and ultrasonically mixed for 20 minutes;

[0051] 3) After the solution is fully mixed, it is heated to 95° C. in an oil bath, and after 3 hours of reaction, washed, centrifuged and dried to obtain the platinum-palladium-copper multi-branched na...

Embodiment 3

[0055] A preparation method of a tripod-shaped platinum-palladium-copper alloy catalyst for catalyzing oxygen reduction reaction, the method comprises the following steps:

[0056] 1) prepare the sodium chloropalladate, chloroplatinic acid and cupric chloride solution that concentration is 20mM respectively, and concentration is that the hydrochloric acid solution of 6M and the ascorbic acid solution that concentration is 0.1M;

[0057] 2) 1.5 mL of sodium chloropalladate, 1.5 mL of chloroplatinic acid and 1.5 mL of cupric chloride solution were respectively mixed, then 0.2 mL of hydrochloric acid solution was added, 200 mg of potassium bromide and 50 mg of F127 were added, and ultrasonically mixed uniformly. Finally, 2 mL of ascorbic acid solution was added, and ultrasonically mixed for 20 minutes;

[0058] 3) After the solution is fully mixed, it is placed in an oil bath and heated to 95° C. After 3 hours of reaction, washed, centrifuged and dried to obtain the platinum-pall...

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Abstract

The invention discloses a tripod shaped platinum palladium copper alloy catalyst capable of catalyzing oxygen reduction reaction, and a preparation method thereof. The preparation method comprises following steps: a sodium tetrachloropalladate solution, a chloroplatinic acid solution, and a copper chloride solution with concentrations ranging from 5 to 50mM are prepared respectively, a hydrochloric acid solution with a concentration ranging from 1 to 10M, and an ascorbic acid solution with a concentration ranging from 0.05 to 0.2M are prepared respectively; 4.5ml of the sodium tetrachloropalladate solution, 4.5ml of the chloroplatinic acid solution, and 4.5ml of the copper chloride solution are mixed, 0.1 to 1ml of the hydrochloric acid solution is added, 0.1 to 1g of potassium bromide, and 0.01 to 0.1g of F127 are added, and an obtained mixture is mixed to be uniform; 1 to 5ml of the ascorbic acid solution is added; after solution full mixing, an obtained mixed product is heated to 50to 150 DEG C in an oil bath pan, reaction is carried out for 1 to 10h, and washing, centrifugation, and drying are carried out so as to obtain the tripod shaped platinum palladium copper alloy catalyst. The preparation method is simple; the reaction time is short; the material prepared at normal temperature under normal pressure possesses excellent electrochemical oxidation-reduction ability.

Description

(1) Technical field [0001] The invention relates to a tripod-shaped platinum-palladium-copper alloy catalyst for catalyzing oxygen reduction reaction and a preparation method thereof. The catalyst can be used for the research of electrochemical catalytic oxidation-reduction reaction. (2) Background technology [0002] Proton membrane fuel cells can convert chemical energy stored in organic matter and hydrogen into electricity, which is of great significance to replace fossil fuels. In the field of energy conversion, platinum-based catalysts are widely used, however, the high loading and high cost seriously hinder the further development and large-scale industrialization of platinum-based materials. And pure platinum catalysts are easily agglomerated, poisoned by intermediates, and occupied by active sites, which seriously hinders the adsorption of new reactants and affects the catalytic efficiency and activity. Noble metal nanocrystals have attracted extensive attention, am...

Claims

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Application Information

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IPC IPC(8): B01J23/89B82Y30/00H01M4/92C25B1/30C25B11/08
CPCB01J23/8926B01J35/0033B82Y30/00C25B1/30C25B11/097H01M4/921Y02E60/50
Inventor 王鸿静尹淑丽王自强许友薛海荣王亮
Owner ZHEJIANG UNIV OF TECH
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