Preparation method of tin oxide-bacterial cellulose composite supported palladium-based fuel cell catalyst

A technology of bacterial cellulose and bacterial cellulose membrane, which is applied in the field of preparation of tin oxide-bacterial cellulose composite supported palladium-based fuel cell catalysts, can solve the problems of catalyst CO poisoning activity and reduction, and achieve improved dispersion and preparation process The effect of stability and easy access to raw materials

Active Publication Date: 2019-12-17
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to improve the problems of catalyst CO poisoning and activity reduction, the invention provides a preparation method of tin oxide-bacterial cellulose composite supported palladium-based fuel cell catalyst

Method used

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  • Preparation method of tin oxide-bacterial cellulose composite supported palladium-based fuel cell catalyst
  • Preparation method of tin oxide-bacterial cellulose composite supported palladium-based fuel cell catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add the lumpy bacterial cellulose membrane to a 0.3% sodium hydroxide solution by mass percentage and boil it in a water bath at 358K for 5 hours. After the water bath treatment is completed, rinse repeatedly with a large amount of deionized water until the pH value is neutral. Then put the bacterial cellulose membrane into NaOH / urea / H with a mass percentage of 7:12:81 2 In the O mixed solution (pre-cooled to -12 ℃), stir vigorously until all the lumps of bacterial cellulose are dissolved, and a transparent bacterial cellulose solution is obtained;

[0026] (2) SnCl 4 ·5H 2 O and the bacterial cellulose treated in step (1) were mixed with a mass ratio of 1:5 for 0.5 hours and fully dispersed by ultrasonic, and then magnetic stirring was continued for 8 hours, and then 2 mol / L HCl solution was added dropwise to make the pH value neutral. Finally, the solid powder is obtained by ethanol centrifugal washing and freeze drying;

[0027] (3) Place the solid powder obtained in...

Embodiment 2

[0033] (1) Add the lumpy bacterial cellulose membrane to 1.0% sodium hydroxide solution by mass percentage, and treat it in a water bath at 358 K for 4 hours. After the water bath treatment is completed, rinse repeatedly with a large amount of deionized water until the pH value is neutral. Then put the bacterial cellulose membrane into NaOH / urea / H with a mass percentage of 7:12:81 2 In the O mixed solution (pre-cooled to -12 ℃), stir vigorously until all the lumps of bacterial cellulose are dissolved, and a transparent bacterial cellulose solution is obtained;

[0034] (2) SnCl 4 ·5H 2 O and step (1) treated bacterial cellulose at a mass ratio of 5:1 to mix and ultrasonic for 1 hour to fully disperse, then continue magnetic stirring for 6 hours, and then add 2 mol / L HCl solution dropwise to make the pH neutral. Finally, the solid powder is obtained by centrifugal washing and freeze drying with deionized water;

[0035] (3) Place the solid powder obtained in step (2) in a tube furn...

Embodiment 3

[0040] (1) Add the lumpy bacterial cellulose membrane to 2.5% sodium hydroxide solution by mass percentage, and treat it in a water bath at 358 K for 2 hours. After the water bath treatment is completed, rinse repeatedly with a large amount of deionized water until the pH value is neutral. Then put the bacterial cellulose membrane into NaOH / urea / H with a mass percentage of 7:12:81 2 In the O mixed solution (pre-cooled to -12 ℃), stir vigorously until all the lumps of bacterial cellulose are dissolved, and a transparent bacterial cellulose solution is obtained;

[0041] (2) SnCl 4 ·5H 2 O and the bacterial cellulose treated in step (1) were mixed with a mass ratio of 2:3 and sonicated for 3 hours to fully disperse, and then magnetic stirring was continued for 4 hours, and then 2 mol / L HCl solution was added dropwise to make the pH neutral. Finally, the solid powder is obtained by centrifugal washing and freeze drying with deionized water;

[0042] (3) Place the solid powder obtaine...

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Abstract

The invention discloses a method for preparing a tin oxide-bacterial cellulose composite supported palladium base fuel-cell catalyst and belongs to the technical field of preparation of fuel-cell catalytic materials. The preparation materials comprise the following components: SnCl4.5H2O, bacterial cellulose, chloropalladic acid and a reducing agent. The method comprises the following steps: dissolving SnCl4.5H2O and pretreated bacterial cellulose into water, fully dispersing and stirring, drying and calcining to obtain a tin oxide-bacterial cellulose composite carrier; and adding the carrier into a chloropalladic acid solution for fully stirring, and supporting palladium nano-catalyst particles through a liquid phase reduction method. The composite carrier is capable of obviously improving the dispersity of the palladium particles, so that the catalytic activity and stability of the catalyst on alcohols are improved. The method disclosed by the invention is simple and readily available in preparation materials and stable in process and has industrialization prospects.

Description

Technical field [0001] The invention belongs to the technical field of fuel cell catalytic material preparation, and specifically relates to a preparation method of a tin oxide-bacterial cellulose composite supported palladium-based fuel cell catalyst. Background technique [0002] The storage of Pt in the earth is scarce and the price is very expensive, which hinders its application in daily life, and people gradually shift their focus to non-Pt metal catalysts. Currently, more researches on non-Pt catalysts mainly focus on Pd-based catalysts, transition metal alloys and metal carbides. The metal Pd has more reserves on the earth than Pt, and its price is cheaper than Pt. Although under acidic conditions, Pd-based catalysts have very low catalytic oxidation capacity for alcohols, they have higher electrocatalytic activity for alcohols under alkaline conditions. Pd is likely to replace Pt as a fuel cell catalyst in the future. However, there are still many problems in the appli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/92B82Y30/00
CPCB82Y30/00H01M4/921H01M4/925Y02E60/50
Inventor 温翠莲吴军茹洪云张腾萨百晟魏颖
Owner FUZHOU UNIV
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