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Halogen-assisted synthesis of PtCu octahedral nano-alloy and its application in fuel cell

A nano-alloy and fuel cell technology, applied in nanotechnology for materials and surface science, battery electrodes, nanotechnology, etc., to achieve the effect of novel crystal structure and excellent catalytic performance of the alloy

Inactive Publication Date: 2018-12-21
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no reports in the literature on the synthesis of PtCu octahedral alloys and the modulation of their composition by halogens.

Method used

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  • Halogen-assisted synthesis of PtCu octahedral nano-alloy and its application in fuel cell
  • Halogen-assisted synthesis of PtCu octahedral nano-alloy and its application in fuel cell
  • Halogen-assisted synthesis of PtCu octahedral nano-alloy and its application in fuel cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Halogen-assisted synthesis of PtCu octahedral nano-alloys and their application in fuel cells, the features include the following steps: (1) polyvinylpyrrolidone (PVP), metal organic platinum salts and copper salts are added to the organic solvent DMF, the platinum salt The molar ratio of the precursor to the copper salt precursor is 1:2, stir at room temperature for 5 minutes, and the amount of solvent DMF added needs to completely dissolve the metal platinum salt and copper salt;

[0018] (2) Add 2 / 3 mmol NaI to the mixed solution obtained in step (1), and stir at room temperature for about 10 minutes;

[0019] (3) Transfer the mixed solution obtained in step (2) to an autoclave to react for 8 hours, and the temperature is controlled at 150°C;

[0020] (4) The product obtained in step (3) is cooled, washed, and centrifuged to obtain PtCu octahedral nanocrystals, which are dispersed and stored in ethanol solution.

Embodiment 2

[0022] Halogen-assisted synthesis of PtCu octahedral nano-alloy and its application in fuel cells, characterized in comprising the following steps:

[0023] (1) Add polyvinylpyrrolidone (PVP), metal organoplatinum salt and copper salt to the organic solvent DMF, the molar ratio of platinum salt precursor to copper salt precursor is 1:2, stir at room temperature for 5 minutes, solvent DMF The added amount needs to completely dissolve metal platinum salt and copper salt;

[0024] (2) Add 2 / 3 mmol NaBr to the mixed solution obtained in step (1), and stir at room temperature for about 10 minutes;

[0025] (3) Transfer the mixed solution obtained in step (2) to an autoclave to react for 8 hours, and the temperature is controlled at 150°C;

[0026] (4) The product obtained in step (3) is cooled, washed, and centrifuged to obtain PtCu octahedral nanocrystals, which are dispersed and stored in ethanol solution.

Embodiment 3

[0028] Halogen-assisted synthesis of PtCu octahedral nano-alloy and its application in fuel cells, characterized in comprising the following steps:

[0029] (1) Add polyvinylpyrrolidone (PVP), metal organoplatinum salt and copper salt to the organic solvent DMF, the molar ratio of platinum salt precursor to copper salt precursor is 1:2, stir at room temperature for 5 minutes, solvent DMF The added amount needs to completely dissolve metal platinum salt and copper salt;

[0030] (2) Add 4 / 9 mmol NaBr and 2 / 9 mmol NaI to the mixed solution obtained in step (1), and stir at room temperature for about 10 minutes;

[0031] (3) Transfer the mixed solution obtained in step (2) to an autoclave to react for 8 hours, and the temperature is controlled at 150°C;

[0032] (4) The product obtained in step (3) is cooled, washed, and centrifuged to obtain PtCu octahedral nanocrystals, which are dispersed and stored in ethanol solution.

[0033] Reverse Example 1

[0034] (1) Add 12 mg of p...

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Abstract

The invention discloses a preparation method of halogen-assisted synthesis PtCu octahedral nanometer alloy, characterized by including the following steps: (1) adding polyvinylpyrrolidone (PVP), metalorganic platinum salt and the copper salt are into the organic solvent DMF together, the amount of the metal salt precursor is 0.01 mmol ~ 0.06 mmol, the molar ratio of the platinum salt precursor tothe copper salt precursor is 1: 1 ~ 1: 3, and stirring at room temperature for 5 ~ 8 minutes, the amount of the solvent DMF needs to dissolve the metal platinum salt and the copper salt completely; 2, adding the halogen salt into the mixed solution obtain in the step 1, and stirring for about 10 minutes at room temperature; 3, transferring the mixed solution obtain in the step 2 to a high-pressure reaction kettle for reaction for 6 to 18 hours, and controlling the temperature to be 130 to 180 DEG C; 4) cooling and washing theproduct obtained in the step 3), centrifuging and separating to obtain PtCu octahedral nanocrystal, and dispersing and storing the sample in ethanol.

Description

technical field [0001] The invention relates to halogen-assisted synthesis of PtCu octahedral nano-alloy and its application in fuel cells. Background technique [0002] Traditional fossil energy is in short supply, has a low energy conversion rate, and is harmful to the environment. The fuel cell can reduce the loss of energy in some intermediate processes and is environmentally friendly. It is an ideal power source now. Noble metals are good catalysts for fuel cells, especially metal platinum is an ideal electrode material for fuel cells. However, the high cost and easy poisoning of platinum metal limit its commercial application. In order to solve the above problems, other cheap metals, such as Cu and platinum to form an alloy, can be added to replace metal platinum as the electrode catalyst of the fuel cell. The invention successfully synthesizes the PtCu octahedral nano-alloy by controlling and controlling the halogen, which has a good application in the fuel cell. ...

Claims

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Application Information

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IPC IPC(8): H01M4/92B82Y30/00
CPCB82Y30/00H01M4/921H01M4/928Y02E60/50
Inventor 袁强赵凤玲
Owner GUIZHOU UNIV