Catalytic electrode material and its preparation method and application, electrode and electrochemical cell

A catalytic electrode and electrochemical technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems such as unevenness, catalysts that do not play a catalytic role, and thick coatings of noble metal catalysts to achieve the effect of reducing thickness

Active Publication Date: 2021-12-07
HUNAN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalytic electrode obtained by this method has low catalyst utilization
For example, in the titanium electrode used for industrialized electrocatalysis prepared by the traditional thermal reduction method, the noble metal catalyst coating is thick and uneven, which reduces the efficiency of electrochemical catalysis; at the same time, the catalyst in the inner layer does not play a catalytic role. The use of precious metals causes unnecessary waste and greatly reduces the utilization rate of precious metals

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  • Catalytic electrode material and its preparation method and application, electrode and electrochemical cell
  • Catalytic electrode material and its preparation method and application, electrode and electrochemical cell
  • Catalytic electrode material and its preparation method and application, electrode and electrochemical cell

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preparation example Construction

[0038] One embodiment of the present invention provides a method for preparing a catalytic electrode material, comprising the following steps S100-S200.

[0039] Step S100, immersing the titanium mesh in a noble metal salt solution to prepare a titanium mesh loaded with a noble metal salt.

[0040] In some of the embodiments, the above soaking conditions are: soaking at -60°C to 90°C for 0.1min to 60min.

[0041] It should be noted that, in the above soaking step, there is no strict limit on the amount of the noble metal salt solution, as long as the noble metal salt solution can immerse the titanium mesh.

[0042] In some of these embodiments, the solvent of the noble metal salt solution is at least one selected from water, organic alcohols, benzene and its derivatives, furan and its derivatives, amide compounds, organic nitriles, organic ketones, alkanes and halogenated alkanes. species; the concentration of the above-mentioned precious metal salt solution is 0.01mg / mL~100m...

Embodiment 1

[0083] 1) Prepare H with a concentration of 4 mg / mL 2 PtCl 6 ·6H 2 O absolute ethanol solution.

[0084] 2) Soak the 200-mesh titanium mesh in 40wt% NaOH solution and 15wt% oxalic acid solution for 10 minutes; take out the titanium mesh and place it in the PtCl obtained in step 1). 6 ·6H 2 O absolute ethanol solution, after soaking for 10 minutes, the titanium mesh was taken out, and vacuum-dried at room temperature for 1 hour to obtain a catalytic electrode material intermediate.

[0085] 3) Place the catalytic electrode material intermediate prepared in step 2) in the furnace of the plasma equipment, turn on the plasma and pass in argon gas at a rate of 100 sccm for plasma discharge, reduce the reaction at 80°C for 10 minutes, and stop Introduce argon gas, after natural cooling to room temperature, take out the material from the plasma equipment furnace, soak and wash with deionized water, acetone and absolute ethanol in turn for 10 minutes, and finally vacuum-dry at 40°...

Embodiment 2

[0089] 1) Prepare an acetone solution with a concentration of 10 mg / mL iridium acetylacetonate.

[0090] 2) Place the 200-mesh titanium mesh successively in 40wt% NaOH solution and 15wt% oxalic acid solution for soaking treatment for 10 minutes; take out the titanium mesh and place it in the acetone solution of iridium acetylacetonate obtained in step 1), after soaking for 10 minutes, place The titanium mesh was taken out, and vacuum-dried at room temperature for 1 hour to obtain a catalytic electrode material intermediate.

[0091] 3) Place the catalytic electrode material intermediate prepared in step 2) in the furnace of the plasma equipment, turn on the plasma and pass in argon gas at a rate of 10 sccm for plasma discharge, reduce the reaction at 400°C for 15 minutes, and stop Introduce argon gas, after natural cooling to room temperature, take out the material from the plasma equipment furnace, soak and wash with deionized water, acetone and absolute ethanol in turn for 1...

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Abstract

The invention relates to a catalytic electrode material and its preparation method and application, electrode and electrochemical cell; wherein, in the preparation method of the catalytic electrode material, the titanium mesh is first soaked in a noble metal salt solution to obtain titanium loaded with a noble metal salt net; then carry out the plasma reduction reaction on the titanium net loaded with the noble metal salt in the plasma to prepare the catalytic electrode material; wherein, the plasma source used in the plasma reduction reaction has an input rate of 0.1sccm~1000sccm, thus A thin and uniform noble metal layer is formed on the surface of the titanium mesh, which improves the catalytic efficiency of the noble metal, thereby improving the utilization rate of the noble metal and reducing the production cost. When the catalytic electrode material is used in an electrochemical catalytic reaction, it has excellent stability and high catalytic efficiency.

Description

technical field [0001] The invention relates to the field of electrochemical catalytic materials, in particular to a catalytic electrode material, a preparation method and application thereof, an electrode and an electrochemical cell. Background technique [0002] Electrochemical catalysis involves various fields such as energy and the environment, and is widely used in electrolytic cells, metal-air batteries, fuel cells, water splitting and CO 2 transforming technology. For example, a fuel cell is a device that directly converts the chemical energy of hydrogen and oxygen into electrical energy through an electrode reaction. The biggest feature of this device is that its energy conversion efficiency is not affected by "Carnot The limit of "circulation" can be as high as 60% to 80%, and the actual efficiency is 2 to 3 times that of ordinary internal combustion engines. The core of the fuel cell is the membrane electrode, which generally includes a proton exchange membrane, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/92H01M4/88
CPCH01M4/8825H01M4/9041H01M4/9058H01M4/9075H01M4/925Y02E60/50
Inventor 王双印龙鹏陶李杜石谦
Owner HUNAN UNIV
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