Flower-like palladium hydride catalyst for catalyzing oxygen reduction reaction and preparation method of flower-like palladium hydride catalyst

A technology of palladium hydride and catalyst, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problem of difficult to achieve oxygen reduction activity, and achieve the effects of enhancing electrocatalytic oxygen reduction activity, high yield, and novel preparation method

Inactive Publication Date: 2021-10-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for pure palladium catalysts, it is difficult to achieve the oxygen reduction activity close to that of platinum due to its inherent electronic structure.

Method used

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  • Flower-like palladium hydride catalyst for catalyzing oxygen reduction reaction and preparation method of flower-like palladium hydride catalyst
  • Flower-like palladium hydride catalyst for catalyzing oxygen reduction reaction and preparation method of flower-like palladium hydride catalyst
  • Flower-like palladium hydride catalyst for catalyzing oxygen reduction reaction and preparation method of flower-like palladium hydride catalyst

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Effect test

Embodiment 1

[0037] A preparation method of a flower-shaped palladium hydride catalyst for catalyzing an oxygen reduction reaction, said method comprising the steps of:

[0038] 1) Take 10 mg of sodium chloropalladate and 30 mg of tungsten hexacarbonyl, and then add 8 mL of N,N-dimethylformamide solution. After the solution is fully mixed, add 2 mL of acetic acid solution; the solution is fully mixed Afterwards, place it in an oil bath and heat it to 140°C. After reacting for 2 hours, wash, centrifuge, and dry to obtain flower-shaped palladium.

[0039] 2) Take the flower-shaped palladium with a mass of 4mg, add 20mL of N,N-dimethylformamide solution, mix well, put it in an oil bath and heat it to 160°C, and react for 16h After washing, centrifuging and drying, the flower-like palladium hydride redox catalyst is obtained.

[0040] The SEM figure of the flower-shaped palladium hydride that obtains sees figure 1 . The TEM figure of the flower-shaped palladium hydride obtained is shown in ...

Embodiment 2

[0043] A kind of preparation method of the spongy palladium hydride alloy catalyst of catalytic oxygen reduction reaction, described method comprises the steps:

[0044] 1) Take 1 mg of sodium chloropalladate and 1 mg of tungsten hexacarbonyl, and then add 1 mL of N,N-dimethylformamide solution. After the solution is fully mixed, add 1 mL of acetic acid solution; the solution is fully mixed Afterwards, place it in an oil bath and heat it to 50°C, react for 1 hour, wash, centrifuge, and dry to obtain palladium hydride in the form of sponge.

[0045] 2) Take the prepared sponge-like palladium hydride with a mass of 4mg, add 1mL of N,N-dimethylformamide solution, mix well, place in an oil bath and heat to 50°C, and react After 1 h, wash, centrifuge, and dry to obtain a spongy palladium hydride oxygen reduction catalyst.

[0046] The SEM figure of the spongy palladium hydride obtained is referring to Figure 8 , to obtain linear sweep voltammetry at 1600 rpm, mass activity and a...

Embodiment 3

[0049] A preparation method of a flower-shaped palladium hydride catalyst for catalyzing an oxygen reduction reaction, said method comprising the steps of:

[0050] 1) Take 50mg of sodium chloropalladate and 50mg of tungsten hexacarbonyl, respectively, and then add 20mL of N,N-dimethylformamide solution. After the solution is fully mixed, add between 10mL of acetic acid solution; the solution is fully After mixing, place in an oil bath and heat to 200°C, react for 10 hours, wash, centrifuge, and dry to obtain the product.

[0051] 2) Take the prepared product with a mass of 10mg, add 50mL of N,N-dimethylformamide solution, mix well, put it in an oil bath and heat it to 200°C, and react for 30h, Wash, centrifuge and dry to obtain the catalyst.

[0052] Because in this process, the mass of sodium chloropalladate and tungsten hexacarbonyl is relatively large, the size of the catalyst synthesized is also relatively large; in addition, after increasing the amount of acetic acid, t...

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Abstract

The invention relates to a flower-like palladium hydride catalyst for catalyzing oxygen reduction reaction. A preparation method for the flower-like palladium hydride catalyst comprises the following steps: respectively weighing 1-50 mg of sodium chloropalladate and tungsten hexacarbonyl, adding 1-20 mL of an N,N-dimethylformamide solution, fully mixing formed solutions, and then adding 1-10 mL of acetic acid solution; after the solutions in the previous step are fully mixed, putting the mixed solution into an oil bath pan, conducting heating to 50-200 DEG C, performing reacting for 1-10 hours, and successively carrying out washing, centrifuging and drying to obtain flower-shaped palladium; and weighing 1-10 mg of prepared flower-like palladium, adding 1-50 mL of the N,N-dimethylformamide solution, conducting uniform mixing, performing heating to 50-200 DEG C in the oil bath pan, carrying out reacting for 1-30 hours, and then successively carrying out washing, centrifuging and drying to obtain the flower-like palladium hydride catalyst. The invention also provides the preparation method of the catalyst. The preparation method is simple in process, and the prepared catalyst has excellent electrochemical oxidation-reduction performance.

Description

technical field [0001] The invention relates to a flower-shaped palladium hydride catalyst for catalyzing oxygen reduction reaction and a preparation method thereof. The catalyst can be used for the research of electrochemically catalyzed redox reaction. Background technique [0002] The excessive consumption of fossil fuels and the ever-increasing demand for energy in modern society urgently require the development of renewable energy that can replace fossil fuels. The conversion of chemical energy into electrical energy is a promising energy conversion technology. Among them, fuel cells have attracted much attention due to their high energy density, environmental friendliness, and high energy conversion efficiency. Fuel cells rely on two important chemical processes, the oxygen reduction reaction and the fuel oxidation reaction. However, the hysteresis of the kinetics of the oxygen reduction reaction at the fuel cell cathode has become a bottleneck in the development of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/075
CPCC25B11/075
Inventor 王鸿静周同庆王自强许友王亮
Owner ZHEJIANG UNIV OF TECH
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