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High CO-resistant anode catalyst of direct alcohol fuel cells and preparation and application

A fuel cell electrode, fuel cell technology, applied in fuel cell parts, battery electrodes, physical/chemical process catalysts, etc., can solve the problems of high price, scarcity of platinum-based anode catalyst resources, easy poisoning, etc., and achieve low cost. , Reduce the effect of dissolution and shedding, and reduce poisoning

Inactive Publication Date: 2012-10-03
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to address the shortcomings of the existing platinum-based anode catalysts for direct ethanol fuel cells such as scarcity of resources, easy poisoning, and high price, and propose a non-platinum-based anode catalyst for direct ethanol fuel cells with high resistance to CO and a preparation method and its application in the preparation of electrodes for direct ethanol fuel cells

Method used

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  • High CO-resistant anode catalyst of direct alcohol fuel cells and preparation and application
  • High CO-resistant anode catalyst of direct alcohol fuel cells and preparation and application
  • High CO-resistant anode catalyst of direct alcohol fuel cells and preparation and application

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Synthesis of Te dendrites: In a 50mL stainless steel autoclave lined with polytetrafluoroethylene, 0.13mmol tellurium diethyldithiocarbamate (TDEC) was dissolved in 27.6mL CHCl 3 , and then sequentially added 0.65mmol dithiosalicylic acid (DTBA) and 4.3mL NH with pH=10 3 ·H 2 O-NH 4 Cl buffer solution to 62% of the volume, the autoclave is sealed and placed in a 120°C oven. After 3 hours of reaction, the reaction solution is quenched (ice bath) to room temperature (25°C), and the two-phase interface product is centrifugally separated ( 8000rpm, 5min) to obtain a black product (precipitate), which was washed three times with high-purity water and absolute ethanol in turn, after washing, centrifuged (8000rpm, 5min) to take the precipitate and then dried in a vacuum oven at 50°C for 4 hours to obtain tellurium dendrites 15.7 mg, the yield is 94.6%. Scanning electron microscope image of tellurium dendrite see figure 1 As shown in (a) and (b), it can be seen that the...

Embodiment 2

[0045] Example 2 Preparation of highly resistant CO anode catalyst for direct ethanol fuel cell

[0046] (1) Synthesis of Te dendrites: In a 50mL stainless steel autoclave lined with polytetrafluoroethylene, 0.13mmol biphenyl ditellurium was dissolved in 27.6mL CHCl 3 , and then sequentially added 0.65mmol dithiosalicylic acid (DTBA) and 4.3mL NH at pH=10 3 ·H 2 O-NH 4 Cl buffer solution to 62% of the volume, the autoclave is sealed and placed in a 120°C oven. After 3 hours of reaction, the reaction solution is quenched (ice bath) to room temperature (25°C), and the two-phase interface product is centrifugally separated ( 8000rpm, 5min) to obtain a black product (precipitate), which was washed three times with high-purity water and absolute ethanol in turn, after washing, centrifuged (8000rpm, 5min) to take the precipitate and then dried in a vacuum oven at 50°C for 4 hours to obtain tellurium dendrites 15.2 mg, the yield is 91.6%. The structure of tellurium dendrites is c...

Embodiment 3

[0048] The preparation of embodiment 3 catalyst

[0049] (1) Synthesis of Te dendrites: In a 50mL stainless steel autoclave lined with polytetrafluoroethylene, 0.13mmol biphenyl ditellurium was dissolved in 27.6mL CHCl 3 , and then sequentially added 0.65mmol (0.117g) of glucose and 4.3mL of NH at pH=8 3 ·H 2 O-NH 4 Cl buffer solution to 62% of the volume, the autoclave was sealed and placed in an oven at 120°C. After reacting for 3 hours, it was quenched (ice bath) to room temperature (25°C). Take the two-phase interface product and centrifuge (8000rpm, 5min) to obtain a black product (precipitate), wash the precipitate with high-purity water and absolute ethanol three times in turn, and centrifuge after washing (8000rpm, 5min) to take the precipitate and put it in a vacuum oven at 50°C After drying for 4 hours, 15.2 mg of tellurium dendrites were obtained with a yield of 91.6%. The structure of the tellurium dendrites was confirmed to be the same as that of the tellurium...

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Abstract

The invention discloses a high CO-resistant anode catalyst of direct alcohol fuel cells and a preparation and an application. The catalyst is prepared by the following steps that an organic tellurium source is dissolved in an organic solvent, the mixture is placed into a buffer solution with PH in a range from 8 to 10, and the mixture is subjected to sealing reaction at a temperature of 120 DEG C to 150 DEG C for 3 to 5 hours, when the reaction is over, the reaction solution is quenched to room temperature, two phase interface products are subjected to centrifugation, sediments are washed and dried, and tellurium dendritic crystal is obtained; and the obtained tellurium dendritic crystal is mixed with glycol and gold containing precursor, the mixture is oscillated in a sealing condition at a temperature of 60 DEG C for 3 to 5 hours, when the reaction is over, the reaction solution is subjected to centrifugation, sediments are washed and dried, and the high CO-resistant anode catalyst of direct alcohol fuel cells is obtained. According to the high CO-resistant anode catalyst of direct alcohol fuel cells and the preparation and the application, the catalyst has good catalytic activity to CO, and the stability is improved greatly; and the cost is low, the operation process is simple, the period is short, and the catalyst can be produced in batches.

Description

(1) Technical field [0001] The invention relates to the field of fuel cells, in particular to a highly CO-resistant anode catalyst for direct ethanol fuel cells, as well as its preparation and application. (2) Background technology [0002] Direct Ethanol Fuel Cell (Direct Ethanol Fuel Cell, DEFC) is a kind of fuel cell, which directly uses ethanol solution as fuel. Compared with batteries using hydrogen and methanol as fuel, ethanol is easy to store and transport, and can be produced by biomass (Biomass) Produced by fermentation, it is rich in sources, low in toxicity, high in hydrogen content, and is a completely renewable resource. DEFC has the advantages of low energy consumption, high energy density, simple operation, and low noise, and has broad application prospects in mobile power sources such as mobile phones, notebook computers, and electric vehicles. Therefore, many universities, scientific research institutions and large companies at home and abroad have investe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M8/02B01J27/057
CPCY02E60/50
Inventor 王舜金辉乐王德猛
Owner WENZHOU UNIVERSITY
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