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Preparation method and application of composite electrode based on mesoporous foamy carbon

A composite electrode and carbon foam technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of affecting the sensitivity of fuel cells, poor conductivity, etc., and achieve the effects of good catalytic effect, stable structure and high sensitivity

Active Publication Date: 2021-06-25
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrical conductivity of the base material of the current fuel cell is poor, which affects the sensitivity of the fuel cell.

Method used

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  • Preparation method and application of composite electrode based on mesoporous foamy carbon
  • Preparation method and application of composite electrode based on mesoporous foamy carbon
  • Preparation method and application of composite electrode based on mesoporous foamy carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Preparation of NiNPs / AuNPs / MFC electrode

[0021] (4) MFC processing

[0022] Take a piece of MFC to be used, ultrasonically clean the MFC glass with deionized water for 30 minutes, take it out, rinse it with deionized water, and dry it with nitrogen gas for later use.

[0023] (2) Flower-shaped gold nano-deposition

[0024] Using a three-electrode system, the MFC electrode was immersed in H 2 SO 4 (0.5M) and KAuCl 4 (1 mg / m L) mixture, a platinum electrode was used as a counter electrode, and Ag / AgCl was used as a reference electrode. Using square wave voltammetry, set the electrodeposition parameters of the electrochemical workstation: initial voltage -0.2V, end potential: -0.9V, potential increment: 0.05V, amplitude 0.025V, frequency 20HZ. After the deposition, the electrode is protected by nitrogen gas, and it is ready for use after three days.

[0025] (3) Preparation of Ni-Au / MFC composite electrode

[0026] A three-electrode system was adopted, w...

Embodiment 2

[0028] Example 2 Comparison of cyclic voltammetry curves between maltose solution and blank solution

[0029] First, put the three-electrode system in a KOH solution with a pH of 14 and a concentration of 1 mol / L, and use cyclic voltammetry to scan in the potential range of -0.2 to 1.3V, and record the cyclic voltammetry curve of the blank solution; then , put the three-electrode system in the 10mmol / L maltose test solution containing 1mol / L KOH solution with a pH of 14 as the supporting electrolyte, and use cyclic voltammetry to scan in the potential range of -0.2 to 1.3V. Record the cyclic voltammetry curve of maltose. as attached figure 2 Shown: The catalytic effect of the Au-Ni electrode in 10mmol / L maltose was tested at a scanning speed of 100mV / s. It can be seen from the figure that the Au-Ni electrode has a good catalytic activity for maltose. It shows that the fuel composed of Ni-Au / MFC electrodes can efficiently convert bioenergy into electrical energy.

Embodiment 3

[0030] Example 3 Cyclic voltammetry response of NiNPs / AuNPs / MFC electrode to the same concentration of maltose at different scan rates

[0031] Place the three-electrode system in turn in the 10mm maltose solution to be tested containing 1mol / L KOH solution with a pH of 14 as the supporting electrolyte, and test the maltose solution at the same concentration with different scan rates, the scan rates are 20mV / s, 40mV / s, V / s, 60mV / s, 80mV / s, and 100mV / s were scanned in the potential range of -0.2 to 1.3V by cyclic voltammetry. Record the cyclic voltammetry curves of maltose with the same concentration and different scan rates. as attached image 3 , attached Figure 4 Shown: It can be seen from the figure that as the scan rate increases, the oxidation current of the nanoelectrode in the maltose solution also increases, and the oxidation peak also increases, showing a good linear response to catalyze maltose. This can prove that Au-Ni electrode catalyzed maltose is diffusion c...

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Abstract

The invention discloses a preparation method and application of a composite electrode based on mesoporous foamy carbon, and belongs to the field of fuel cells. According to the composite electrode based on the mesoporous foamy carbon, firstly, an MFC is treated, then flower-shaped nanogold deposition is carried out, and finally, a Ni-Au / MFC composite electrode is prepared. According to the application of the electrode, a NiNPs / AuNPs / MFC electrode is used as a working electrode, an Ag / AgCl electrode is used as a reference electrode, and a platinum wire is used as an auxiliary electrode, so that a three-electrode system can be formed; the three-electrode system is placed in a maltose solution and a supporting electrolyte, the potential is set to be -0.2-1.3 V, a cyclic voltammetry curve of 10mmol / L maltose with the scanning speed range of 20-100mV / S is recorded, and the control process of the maltose solution subjected to electrocatalytic oxidation by the electrode by using a standard curve method is analyzed. The electrode with high sensitivity to maltose is prepared by using good conductivity of the MFC, and the electrode has the advantages of good catalytic effect, high sensitivity, good selectivity, stable structure and the like when the maltose is used as a base solution.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a preparation method and application of a composite electrode based on mesoporous foamed carbon. Background technique [0002] With the development of society, the demand for fossil fuels has grown rapidly, which has accelerated the depletion of fossil fuels and serious pollution to the environment, thus limiting the development of human society and seriously affecting human health. In order to mitigate the environmental pollution and human health impact of fossil fuels, it is crucial to find alternatives to them. At present, the technology research, development and utilization of renewable energy are actively and extensively carried out all over the world. At present, the main substitutes for fossil fuels include biodiesel, liquid hydrogen, solar energy, wind energy, etc. Fuel cells are also substitutes for fossil fuels. However, the electrical conductivity of the base ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88H01M8/16
CPCH01M4/9083H01M4/9041H01M4/8825H01M8/16Y02E60/50
Inventor 孙晶曹厚勇郎明非
Owner DALIAN UNIV