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Platinum-palladium-phosphorus dendritic nanoparticles for catalyzing formic acid oxidation reaction and preparation method thereof

A technology for oxidation of nanoparticles and formic acid, which is applied in the direction of nanotechnology, nanotechnology, and nanotechnology for materials and surface science, can solve the problems of low specific surface area and cumbersome preparation process, and achieve large specific surface area, simple steps, easy-to-handle effects

Inactive Publication Date: 2020-04-10
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although many phosphorus-doped platinum-based materials have been reported, most of them are irregular solid structures with low specific surface area and cumbersome preparation process.

Method used

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  • Platinum-palladium-phosphorus dendritic nanoparticles for catalyzing formic acid oxidation reaction and preparation method thereof
  • Platinum-palladium-phosphorus dendritic nanoparticles for catalyzing formic acid oxidation reaction and preparation method thereof
  • Platinum-palladium-phosphorus dendritic nanoparticles for catalyzing formic acid oxidation reaction and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A kind of preparation method of the dendrite platinum palladium phosphorus nano particle that catalyzes formic acid oxidation reaction, described method comprises the steps:

[0046] (1) prepare the ascorbic acid solution that concentration is 20mM chloroplatinic acid solution and concentration is 0.1M respectively;

[0047] (2) Take 5 mL of chloroplatinic acid solution, then add 50 mg of Brij58, and finally add 5 mL of ascorbic acid solution, and mix well;

[0048] (3) After the solution is fully mixed, place it in an ultrasonic cleaner, react at room temperature for 20 minutes, centrifuge, collect and wash the precipitate to obtain dendritic platinum nanoparticles, and redisperse the precipitate in 2 mL of aqueous solution;

[0049] (4) Dissolve 30mg of tetrakis(triphenylphosphine)palladium in 22mL of oleylamine and mix with dendritic platinum nanoparticle solution; transfer the mixed solution to a hydrothermal reaction kettle, react at 180°C for 10h, centrifuge and c...

Embodiment 2

[0053] A preparation method of dendritic platinum nanoparticles that catalyzes formic acid oxidation reaction, said method comprising the steps of:

[0054] 1) Prepare respectively a chloroplatinic acid solution with a concentration of 20mM and an ascorbic acid solution with a concentration of 0.1M;

[0055] 2) Take 5 mL of chloroplatinic acid solution, then add 50 mg of Brij58, and finally add 5 mL of ascorbic acid solution, and mix well;

[0056] 3) After the solution is fully mixed, put it in an ultrasonic cleaner, react at room temperature for 20 minutes, centrifuge, collect and wash the precipitate to obtain dendritic platinum nanoparticles.

[0057] The TEM picture of the obtained dendritic platinum nanoparticles is shown in Figure 6 . The XRD of the dendritic platinum nanoparticles obtained and the XPS figure of platinum are shown in Figure 7 . The linear sweep voltammetry curve, the specific activity and the mass activity of the positive peak potential of the obt...

Embodiment 3

[0060] A kind of preparation method of the dendrite platinum palladium phosphorus nano particle that catalyzes formic acid oxidation reaction, described method comprises the steps:

[0061] (1) prepare the ascorbic acid solution that concentration is the chloroplatinic acid solution of 10mM and the concentration is 0.05M respectively;

[0062] (2) Take 5 mL of chloroplatinic acid solution, then add 20 mg of Brij58, and finally add 1 mL of ascorbic acid solution, and mix well;

[0063] (3) After the solution is fully mixed, place it in an ultrasonic cleaner, react at room temperature for 5 minutes, centrifuge, collect and wash the precipitate to obtain dendritic platinum nanoparticles, and redisperse the precipitate in 2 mL of aqueous solution;

[0064] (4) Dissolve 5mg of tetrakis(triphenylphosphine)palladium in 22mL of oleylamine and mix with dendritic platinum nanoparticle solution; transfer the mixed solution to a hydrothermal reaction kettle, react at 100°C for 5h, centrif...

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Abstract

The invention discloses platinum-palladium-phosphorus dendritic nanoparticles for catalyzing formic acid oxidation reaction and a preparation method thereof. The preparation method comprises the following steps: respectively preparing a chloroplatinic acid solution with the concentration of 10-100mM and an ascorbic acid solution with the concentration of 0.05-0.5M; taking the chloroplatinic acid solution with the volume of 5mL, then adding 20-100mg of Brij58, then adding 1-10mL of the ascorbic acid solution for mixing; carrying out ultrasonic reaction at room temperature for 5-60 minutes, performing centrifuging and washing to obtain dendritic platinum nanoparticles, and dispersing the dendritic platinum nanoparticles into the 2mL of aqueous solution; dissolving 5-80mg of tetrakis(triphenylphosphine) palladium and dendritic platinum nanoparticles into 22mL of oleylamine; and carrying out hydrothermal reaction at 100-200 DEG C for 5-20 hours, and performing centrifuging and washing to obtain the platinum-palladium-phosphorus dendritic nanoparticles. The synthesis method is simple, the product yield is high, and the prepared platinum-palladium-phosphorus nanoparticles have the excellent electro-catalytic formic acid oxidation performance.

Description

[0001] (1) Technical field [0002] The invention relates to a platinum-palladium-phosphorus dendritic nanoparticle for catalyzing the oxidation reaction of formic acid and a preparation method thereof. The catalyst can be used for the research of electrochemically catalyzing the oxidation reaction of formic acid. [0003] (2) Background technology [0004] Direct formic acid fuel cell has the advantages of high energy density and environmental friendliness, and is a potential energy conversion device. At present, platinum-based materials are a class of widely used catalysts for the oxidation of formic acid. Studies have shown that formic acid oxidation mainly occurs through two pathways. One is direct oxidation, that is, formic acid is directly oxidized to carbon dioxide. The other is that formic acid is first oxidized to carbon monoxide, and then oxidized to carbon dioxide (Hongsheng Fan, Ming Cheng, Lei Wang, Yuanjun Song, Yimin Cui, Rongming Wang, Extraordinary electrocat...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/88B82Y30/00
CPCB82Y30/00H01M4/8878H01M4/921Y02E60/50
Inventor 王亮李春洁王自强许友王鸿静
Owner ZHEJIANG UNIV OF TECH
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