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Method for synthesizing supported ternary platinum alloy catalyst

A synthesis method and catalyst technology, applied in electrical components, battery electrodes, circuits, etc., to achieve the effects of mild conditions, simple operation, and reduced usage

Active Publication Date: 2016-07-13
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method has mild synthetic conditions and simple operation, and has not been reported in the literature yet.

Method used

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  • Method for synthesizing supported ternary platinum alloy catalyst
  • Method for synthesizing supported ternary platinum alloy catalyst
  • Method for synthesizing supported ternary platinum alloy catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 100mgCuSO 4 ·5H 2 O, add a few drops of water to dissolve, then add 75mg of VulcanXC-72 carbon spheres and 120mL of ethylene glycol, and ultrasonically disperse for 60min. Then add 300mg NaBH rapidly 4 powder, stirred overnight at room temperature. NaBH 4 After complete decomposition, slowly add 2.4mL19.5mmol / LHAuCl to the above solution at a rate of 0.5mL / min using a peristaltic pump 4 , and continued stirring for 5 h after ultrasonication for 30 min. HAuCl 4 A substitution reaction occurs with Cu, and the generated Au nanoparticles cover the Cu surface, and the Cu 2+ diffuse into the solution. Since the amount of Au is relatively small, it cannot completely cover the surface of Cu nanoparticles, so the surface of Cu has enough space to accommodate other atoms. In order to further obtain the PtAuCu ternary material, we continued to drop 4.8mL19.5mMK in the same way 2 PtCl 4 solution. After the reaction, it was centrifuged, washed, and dried at room tem...

Embodiment 2

[0033] Weigh 100mgCuSO 4 ·5H 2 O, add a few drops of water to dissolve, then add 75mg of VulcanXC-72 carbon spheres and 120mL of ethylene glycol, and ultrasonically disperse for 60min. Then add 300mg NaBH rapidly 4 powder, stirred overnight at room temperature. NaBH 4 After complete decomposition, use a peristaltic pump to slowly add 1mL19.5mmol / LHAuCl to the above solution at a rate of 0.5mL / min 4 , and continued stirring for 5 h after ultrasonication for 30 min. Using the same method to continue to drop 7mL19.5mMK 2 PtCl 4 solution. After the reaction, it was centrifuged, washed, and dried at room temperature. Finally, the above materials were placed in H 2 / Ar atmosphere, calcination at 300°C for 30min to obtain Pt supported on carbon spheres 10 Au 3 Cu 46 Ternary alloy.

Embodiment 3

[0035] Weigh 100mgCuSO 4 ·5H 2 O, add a few drops of water to dissolve, then add 75mg of polypyrrole nanotubes and 120mL of ethylene glycol, and ultrasonically disperse for 60min. Then add 300mg NaBH rapidly 4 powder, stirred overnight at room temperature. NaBH 4 After complete decomposition, slowly add 2.4mL19.5mmol / LHAuCl to the above solution at a rate of 0.5mL / min using a peristaltic pump 4 , and continued stirring for 5 h after ultrasonication for 30 min. Using the same method to continue to drop 4.8mL19.5mMK 2 PtCl 4solution. After the reaction, it was centrifuged, washed, and dried at room temperature. Finally, the above materials were placed in H 2 / Ar atmosphere, calcined at 300°C for 30 min to obtain a PtAuCu ternary alloy supported by carbon spheres.

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Abstract

A method for synthesizing a supported ternary platinum alloy catalyst belongs to the technical field of chemical energy sources.A transition metal is introduced to a platinum catalyst and can adjust spacing of platinum atoms and change an electronic environment around platinum, and unique geometric effect and electronic effect will be resulted in.This change will directly affect adsorption activation energy of platinum surface with an oxygen bearing substance, thus affecting catalytic activity of platinum.

Description

technical field [0001] The invention belongs to the technical field of chemical energy, and relates to a synthesis method of a loaded ternary platinum alloy catalyst for a low-temperature fuel cell. Background technique [0002] With the deterioration of resource and environmental problems, seeking and developing an efficient, clean and economical renewable energy has become the research focus of governments and scientific circles all over the world. A fuel cell is a device that directly converts chemical energy into electrical energy. Because it is not limited by the Carnot cycle, it has the advantages of high energy conversion efficiency, diverse fuels, and environmental friendliness. Therefore, fuel cell technology is one of the most promising new energy technologies in the 21st century. Among them, the proton exchange membrane fuel cell has attracted extensive attention because of its advantages such as high specific energy, low pollution, and fast low-temperature start...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88
CPCH01M4/88H01M4/92H01M4/921H01M4/926Y02E60/50
Inventor 张丽娟王雪付予祝艳磊赵惠慧
Owner BEIJING UNIV OF TECH
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