Composite electrode for catalyzing oxidation of sodium formate, and preparation method and application thereof

A technology for catalyzing sodium formate and composite electrode is applied in the field of composite electrode catalyzing the oxidation of sodium formate and its preparation, which can solve the problems of limiting the catalyst deposition amount, catalytic active area, etc., and achieve the effects of improving catalyst utilization rate, reducing transfer resistance, and shortening transfer path.

Active Publication Date: 2019-09-20
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the catalyst particles are directly deposited on the carbon paper fibers, their relatively fixed surface area limits the amount of catalyst deposited and the catalytically active area.
At pr...

Method used

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  • Composite electrode for catalyzing oxidation of sodium formate, and preparation method and application thereof
  • Composite electrode for catalyzing oxidation of sodium formate, and preparation method and application thereof
  • Composite electrode for catalyzing oxidation of sodium formate, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1, see figure 1 , a method for preparing a composite electrode for catalyzing the oxidation of sodium formate, comprising the following steps:

[0030] A. Put the hydrophilic carbon paper in absolute ethanol for ultrasonic cleaning, then put it into deionized water for ultrasonic cleaning to remove the oil on the surface of the carbon paper, and dry the cleaned carbon paper for later use;

[0031] B. Dissolve cobalt nitrate, ammonium fluoride and urea in deionized water and stir fully to dissolve it to obtain a precursor solution;

[0032] C, transfer the cleaned carbon paper and the precursor solution obtained in step B to a reaction kettle for hydrothermal reaction;

[0033] D. After the hydrothermal reaction is completed, cool to room temperature, take out the carbon paper, rinse it repeatedly with absolute ethanol and deionized water, put it in an oven to dry, and then put the carbon paper with the precursor in the tube furnace in the air atmosphere Calcin...

Embodiment 2

[0040] (1) Put the hydrophilic carbon paper in anhydrous ethanol for 5 minutes and then ultrasonically clean it in deionized water to remove the oil on the surface of the carbon paper. Dry the cleaned carbon paper for later use.

[0041] (2) Dissolve 2mmol of cobalt nitrate, 4mmol of ammonium fluoride, and 10mmol of urea into 50% deionized water and magnetically stir for 15min to dissolve.

[0042] (3) Pour the completely dissolved precursor solution into the lining of a 100mL polytetrafluoroethylene reactor, and then put in carbon paper, so that the carbon paper is completely immersed in the precursor solution, and then seal the lining into the autoclave sleeve, and place it in an oven at 120° Hold for 5 hours.

[0043] (4) Take out the carbon paper after hydroheating in step (3), rinse it repeatedly with absolute ethanol and deionized water, and put it into an oven to dry.

[0044] (5) Put the carbon paper with the precursor into the tube furnace for calcination at 350°C f...

Embodiment 3

[0048] (1) Put the hydrophilic carbon paper in anhydrous ethanol for 5 minutes and then ultrasonically clean it in deionized water to remove the oil on the surface of the carbon paper. Dry the cleaned carbon paper for later use.

[0049] (2) Dissolve 2.5mmol of cobalt nitrate, 5mmol of ammonium fluoride, and 12.5mmol of urea in 30mL of deionized water and magnetically stir for 20min to dissolve.

[0050] (3) Pour the completely dissolved precursor solution into the lining of a 100mL polytetrafluoroethylene reactor, and then put in carbon paper, so that the carbon paper is completely immersed in the precursor solution, and then seal the lining into the autoclave sleeve, and place it in an oven at 120° Hold for 5 hours.

[0051] (4) Remove the carbon paper after hydroheating in step (3), rinse it repeatedly with absolute ethanol and deionized water, and put it into an oven to dry.

[0052] (5) Put the carbon paper with the precursor into the tube furnace for calcination at 350...

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Abstract

The invention discloses a composite electrode for catalyzing the oxidation of sodium formate, and a preparation method thereof and application thereof. The preparation method for the composite electrode used for catalyzing the oxidation of sodium formate comprises the following steps: separately placing hydrophilic carbon paper into absolute ethyl alcohol and deionized water for ultrasonic cleaning so as to remove oil stains on the surface of the carbon paper, and drying the cleaned carbon paper for subsequent use; dissolving cobalt nitrate, ammonium fluoride and urea in deionized water and performing sufficient stirring to obtain a precursor solution; transferring the cleaned carbon paper and the precursor solution to a reaction kettle for a hydrothermal reaction; after the hydrothermal reaction is completed, carrying out cooling to room temperature, taking the carbon paper out, washing the carbon paper repeatedly with absolute ethyl alcohol and deionized water, then drying the carbon paper in an oven, and then putting the carbon paper with a precursor into a tube furnace for calcination in an air atmosphere to obtain a carbon paper electrode having Co3O4 nanowires; and with the prepared carbon paper electrode as a working electrode, carrying out electroplating in an electrolytic bath. The prepared composite electrode is extensively applicable to the fields of energy, the chemical industry, environmental protection, etc.

Description

technical field [0001] The invention relates to the field of electrodes, in particular to a composite electrode for catalyzing the oxidation of sodium formate, a preparation method and application thereof. Background technique [0002] Membraneless microfluidic fuel cells have higher requirements on electrodes due to their small size and simple structure. Electrodes commonly used in membraneless microfluidic fuel cells are graphite plates, conductive substrates (conductive glass), carbon paper or carbon felt. Planar electrodes such as graphite plates or conductive substrates have a relatively small reaction area, and the fuel can only reach the electrode surface through diffusion to react, so the electrode performance is poor and the battery performance is low. In order to improve the performance of the electrode, a porous electrode is used as a permeable electrode, and the fuel flows through the electrode in a convective manner. Porous electrodes have a larger surface are...

Claims

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Application Information

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IPC IPC(8): H01M4/96H01M4/92C25D3/50C25D5/18C23C26/00C23C20/08
CPCC23C20/08C23C26/00C25D3/50C25D5/18H01M4/92H01M4/96Y02E60/50
Inventor 朱恂张童叶丁丁张彪陈蓉廖强何雪丰李俊
Owner CHONGQING UNIV
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