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A bimetallic ptsn/c catalyst for high activity fuel cells and its preparation and application

A fuel cell and bimetal technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor operation durability and high cost, improve catalytic stability, simple and safe preparation process, and facilitate electron transfer. Effect

Active Publication Date: 2022-06-24
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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  • A bimetallic ptsn/c catalyst for high activity fuel cells and its preparation and application
  • A bimetallic ptsn/c catalyst for high activity fuel cells and its preparation and application
  • A bimetallic ptsn/c catalyst for high activity fuel cells and its preparation and application

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preparation example Construction

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

[0032] (a) Pt(acac) 2 and CTAB were added to oleylamine and ultrasonically stirred, then W(CO) was added 6 and SnCl 2 ·2H 2 O forms a reaction system and conducts a 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 then loaded onto the 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℃, the heating reaction time is 2-4h. In step (b), adopt the mixed solution containing ethanol and cyclohexane to wash, in the mixed solutio...

Embodiment 1

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

[0039] 15mg of Pt(acac) 2 (Purity: 97%, Shanghai Aladdin Biochemical Technology Co., Ltd., the same below) and 60mg of CTAB were added to 5ml of oleylamine, and the reagent was uniformly dispersed by ultrasonic stirring (the power of the ultrasonic wave was the parameter value commonly used in the laboratory, namely Yes, to achieve the effect of uniform dispersion, the same below), heat the reaction system to 200 ° C, add 8 mg W(CO) 6 and 15mg SnCl 2 ·2H 2 O and kept for 3 hours, the bimetallic PtSn material was obtained by the reaction. After cooling to room temperature, the bimetallic PtSn material was centrifuged and 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 the Loaded in an ethanol solution containing Vulcan XC-72R activated carbon, ultrasonically stir...

Embodiment 2

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

[0045] 14mg of Pt(acac) 2 Add 55mg of CTAB to 4ml of oleylamine, ultrasonic stirring to make the reagent dispersed uniformly, heat the reaction system to 190℃, add 5mg W(CO) 6 and 13mg SnCl 2 ·2H 2 0 and kept for 4 h, the bimetallic PtSn material was obtained by the reaction. After cooling to room temperature, the bimetallic PtSn material was centrifuged and washed three 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 the Loaded in an ethanol solution containing Vulcan XC-72R activated carbon, ultrasonically stirred for 2 h, after loading, suction filtration was performed in sequence, dried in a vacuum drying oven at 50 ° C for 14 hours, and the dried samples were ground for use to obtain bimetallic PtSn / C catalyst, in which the PtSn material has a one-dimensional str...

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Abstract

The invention relates to a bimetallic PtSn / C catalyst for a high-activity fuel cell and its preparation and application. The preparation method specifically includes the following steps: (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 is formed in the reaction system for heating reaction to obtain bimetallic PtSn materials; (b) after the reaction system is cooled to room temperature, the bimetallic PtSn obtained in step (a) is washed and loaded on activated carbon, and then post-treated to obtain bimetallic PtSn / C Catalyst. Compared with the prior art, the catalyst prepared by the invention has high catalytic activity and good stability, can be used as an anode catalyst of a direct methanol fuel cell, and has a simple 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 the continuous reduction of fossil fuel resources make the development of new alternative energy sources an urgent and important task in modern society. Direct alcohol fuel cells are not limited to the Carnot cycle and have attracted much attention from researchers due to their high energy conversion efficiency, portability, and operational flexibility that can use a variety of fuels. The most important component in a fuel cell is the catalyst. At present, the catalyst used in such cells is still the precious 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 performance. operational durability. [0003] Patent CN...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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