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Construction method of electrocatalytic oxidation methanol fuel cell

A methanol fuel cell, electrocatalytic oxidation technology, applied in the direction of fuel cells, battery electrodes, electrochemical generators, etc., can solve the problems of rapid increase in fossil fuel mining, worry about living conditions, and increased mining difficulty, and achieve simple structure , good catalytic effect, low loading effect

Pending Publication Date: 2021-05-28
DALIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, the harmful gases released by burning fossil fuels in large quantities, including NO X , SO X etc., and various inhalable particles have caused huge damage to the environment, causing people to worry about their own living conditions
On the other hand, energy problems such as the sharp increase in the mining of fossil fuels, the decline in reserves, and the increasing difficulty of mining have hindered the development of human economy and society.

Method used

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  • Construction method of electrocatalytic oxidation methanol fuel cell
  • Construction method of electrocatalytic oxidation methanol fuel cell
  • Construction method of electrocatalytic oxidation methanol fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Preparation of Electrocatalytic Oxidation Methanol Fuel Cell Electrode

[0029] The Au-Ni-Pt / paper electrode of this embodiment is prepared by the following method:

[0030] (1) Using paper as the substrate, apply the graphene solution on the front of the paper electrode. Then soak the electrode alternately in PDDA and PSS solutions for 3 minutes each, and dry it, repeating 3 times.

[0031] (2) Electrochemical method is used to deposit flower-shaped nano gold on the modified paper electrode: a three-electrode system is adopted, the mixed solution of potassium chloroaurate is the electrolyte solution, the modified paper electrode is the working electrode, and the counter electrode is Platinum electrode, the reference electrode is Ag / AgCl, and the set voltage is -0.2V.

[0032] (3) Preparation of Au-Ni-Pt / paper composite electrode by electrochemical method: using a three-electrode system, NiSO 4 (0.02M) and Na 2 SO 4 (0.1M) mixed solution is the electroly...

Embodiment 2

[0034] Example 2: Construction of electrocatalytic oxidation methanol fuel cell

[0035] The Au-Ni-Pt / paper electrode is used as the anode, and the Pt electrode is used as the cathode; a potassium hydroxide solution with a concentration of 0.1mol / L is added as the electrolyte solution in the anode cell, and methanol with a concentration of 0.1mol / L is added as the fuel. A methanol solution with a concentration of 0.1mol / L and a pH value of 8 to 14 is added to the pool, and oxygen is introduced into the pool, and the two pools are connected with an anion exchange membrane to form an electrocatalytic oxidation methanol fuel cell.

[0036] as attached figure 1 As shown, the prepared anode is connected to the platinum electrode by a wire and inserted into a methanol solution to construct an electrocatalytic oxidation methanol fuel cell.

Embodiment 3

[0037]Example 3: Performance test of electrocatalytic oxidation methanol fuel cell

[0038] Test the performance of the electrocatalytic oxidation methanol fuel cell constructed in Example 2: Using an electrochemical workstation, first connect the circuit, the modified anode is used as the working electrode, the battery cathode is used as the counter electrode, and the Ag / AgCl electrode is used as the reference electrode. The catalytic activity of the electrode to methanol was tested by cyclic voltammetry. After determining the initial stable potential of the electrode, a suitable termination potential and scanning rate were selected, and the cyclic voltammetry curve of the electrode was obtained by scanning. as attached figure 2 shown. Test the catalytic effect of Au-Ni-Pt electrode in 0mol / L, 0.25mol / L, 0.5mol / L, 0.75mol / L, 1.0mol / L, 1.25mol / L methanol solution at a scanning speed of 50mV / s . as attached image 3 As shown, it can be seen from the figure that with the in...

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Abstract

The invention relates to a construction method of an electrocatalytic oxidation methanol fuel cell, and belongs to the technical field of fuel cells. The method comprises the steps of taking paper as a substrate, and coating one side of the substrate with a layer of graphene; preparing a Ni-Au / paper electrode with a nano structure by utilizing underpotential deposition, preparing an Au-Ni-Pt / paper electrode with a multi-stage nano structure by utilizing an etching growth-particle self-assembly method, and taking the Au-Ni-Pt / paper electrode as a fuel cell anode for later use; taking a platinum electrode as a fuel cell cathode; and connecting the prepared anode with the platinum electrode through a wire, and inserting into a methanol solution to construct the electrocatalytic oxidation methanol fuel cell. The electrode used in the invention is composed of three metals, a nano golden flower is used as a basic skeleton, non-precious metal nickel is deposited, and finally platinum is used for replacing nickel, so that the loading amount of precious metal platinum is relatively low, the cost of the electrode is reduced, the catalytic activity of nano platinum particles is improved, and when the electrode is applied to a methanol fuel cell, the catalyst has the advantages of high catalytic efficiency and poison resistance.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a construction method of an electrocatalytic oxidation methanol fuel cell. Background technique [0002] In the 21st century, human beings are faced with ever-increasing environmental pollution and energy crises. On the one hand, the harmful gases released by burning fossil fuels in large quantities, including NO X , SO X etc., and all kinds of inhalable particulate matter have caused huge damage to the environment, causing people to worry about their own living conditions. On the other hand, energy problems such as the sharp increase in the mining of fossil fuels, the decline in reserves, and the increasing difficulty of mining have hindered the development of human economy and society. This puts the research on efficient and clean alternative energy on the agenda. In order to reduce dependence on fossil energy and improve the quality of life, on the one hand,...

Claims

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Application Information

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IPC IPC(8): H01M8/1011H01M4/86H01M4/88H01M4/92
CPCH01M8/1011H01M4/8647H01M4/921H01M4/88Y02P70/50Y02E60/50
Inventor 孙晶曹猛孟维琛李雲
Owner DALIAN UNIVERSITY
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