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Bimetallic PtSn/C catalyst for high-activity fuel cell as well as preparation and application of bimetallic PtSn/C catalyst

A fuel cell and bimetallic technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high cost, poor operation durability, etc., and achieve the effects of simple and safe preparation process, improved catalytic stability, and improved utilization rate

Active Publication Date: 2021-04-02
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most important component in a fuel cell is the catalyst. At present, the catalyst used in this type of cell is still the noble metal Pt. Although Pt has been widely used as an electrocatalyst for methanol oxidation, there are still some disadvantages, including scarcity, high cost and poor operating durability

Method used

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  • Bimetallic PtSn/C catalyst for high-activity fuel cell as well as preparation and application of bimetallic PtSn/C catalyst
  • Bimetallic PtSn/C catalyst for high-activity fuel cell as well as preparation and application of bimetallic PtSn/C catalyst
  • Bimetallic PtSn/C catalyst for high-activity fuel cell as well as preparation and application of bimetallic PtSn/C catalyst

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preparation example Construction

[0031] A kind of preparation method of bimetallic PtSn / C catalyst for high activity fuel cell, described preparation method specifically comprises the following steps:

[0032] (a) Pt(acac) 2 and CTAB were added to oleylamine and stirred ultrasonically, then W(CO) was added 6 and SnCl 2 2H 2 O forms a reaction system for heating reaction to obtain a bimetallic PtSn material;

[0033] (b) After the reaction system is lowered to room temperature, the bimetallic PtSn material obtained in step (a) is washed and loaded on activated carbon, and then post-treated to obtain a bimetallic PtSn / C catalyst.

[0034] Wherein, in step (a), Pt(acac) 2 ,CTAB,W(CO) 6 , SnCl 2 2H 2The addition ratio of O and oleylamine is (14-17) mg: (55-65) mg: (5-10) mg: (13-16) mg: (4-8) ml, and the temperature of the heating reaction is 190 -210°C, the heating reaction time is 2-4h. In step (b), a mixed solution containing ethanol and cyclohexane is used for washing. In the mixed solution, the volu...

Embodiment 1

[0038] A bimetallic PtSn / C catalyst for a highly active fuel cell is prepared by the following preparation method:

[0039] 15 mg of Pt(acac) 2 (purity: 97%, Shanghai Aladdin Biochemical Technology Co., Ltd., the same below) and 60 mg of CTAB were added to 5 ml of oleylamine, and after ultrasonic stirring made the reagents uniformly dispersed (the power of the ultrasonic wave adopts the parameter value often used in the laboratory, namely Yes, to achieve uniform dispersion, the same below), heat the reaction system to 200°C, add 8mg W(CO) 6 and 15mg SnCl 2 2H 2 O and kept for 3h, the reaction obtained bimetallic PtSn material, after cooling down to room temperature, the bimetallic PtSn material was centrifugally washed 3 times with a mixed solution of ethanol and cyclohexane with a volume ratio of 1:1, and then the bimetallic PtSn material was dispersed in Carry out loading in ethanol solution containing Vulcan XC-72R activated carbon, ultrasonically stir for 3 hours, then ...

Embodiment 2

[0044] A bimetallic PtSn / C catalyst for a highly active fuel cell is prepared by the following preparation method:

[0045] 14 mg of Pt(acac) 2 and 55mg of CTAB were added to 4ml of oleylamine, and ultrasonically stirred to disperse the reagent evenly, then the reaction system was heated to 190°C, and 5mg of W(CO) was added 6 and 13 mg SnCl 2 2H 2 O and kept for 4h, the reaction obtained bimetallic PtSn material, after cooling down to room temperature, the bimetallic PtSn material was centrifugally washed 3 times with a mixed solution of ethanol and cyclohexane with a volume ratio of 0.8:1, and then the bimetallic PtSn material was dispersed in Carry out loading in ethanol solution containing Vulcan XC-72R activated carbon, stir ultrasonically for 2 hours, then carry out suction filtration in sequence after loading, dry in a vacuum oven at 50°C for 14 hours, grind the dried samples for later use, and obtain bimetallic PtSn / C catalyst, wherein the PtSn material has a nanowi...

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Abstract

The invention relates to a bimetallic PtSn / C catalyst for a high-activity fuel cell as well as preparation and application of the bimetallic PtSn / C catalyst. The preparation method specifically comprises the following steps of (a) adding Pt (acac)2 and CTAB (cetyltrimethyl ammonium bromide) into oleylamine, carrying out ultrasonic stirring, and then adding W(CO)6 and SnCl2. 2H2O to form a reactionsystem for heating reaction, so as to obtain a bimetal PtSn material; and (b) after the reaction system is cooled to room temperature, washing the bimetal PtSn obtained in the step (a), loading the bimetal PtSn on activated carbon, and carrying out aftertreatment to obtain the bimetal PtSn / C catalyst. Compared with the prior art, the prepared catalyst has high catalytic activity and good stability, can be used as a direct methanol fuel cell anode catalyst, and is simple in preparation process.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a bimetallic PtSn / C catalyst for high-activity fuel cells and its preparation and application. Background technique [0002] Global climate change and continuously decreasing reserves of fossil fuel resources make the development of new alternative energy sources an urgent and important task for modern society. Direct alcohol fuel cells, which are not limited by the Carnot cycle, have attracted extensive attention from researchers due to their high energy conversion efficiency, portability, and operational flexibility with a variety of fuels. The most important component in a fuel cell is the catalyst. At present, the catalyst used in this type of cell is still the noble metal Pt. Although Pt has been widely used as an electrocatalyst for methanol oxidation, there are still some disadvantages, including scarcity, high cost and poor operational durability. [0003] Patent C...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M4/92B82Y30/00B82Y40/00
CPCH01M4/8825H01M4/9041H01M4/9083H01M4/921H01M4/926B82Y30/00B82Y40/00H01M2004/8684Y02E60/50
Inventor 李巧霞朱志强刘峰谢胜男陈溢李林科
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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