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Recyclable electrocatalytic electrode, preparation method and recovery method

A technology of electrocatalysis and electrocatalysis, which is applied in the field of electrochemistry, can solve the problems of unstable electrodes, insufficient performance, poor reuse of conductive substrates, etc., and achieve the effects of reducing production costs, improving stability and corrosion resistance

Inactive Publication Date: 2019-10-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although such an electrode can use the above-mentioned conventional deposition method to form a catalyst layer, it is also found that the electrode is unstable, the conductive substrate is easily exposed, and other shortcomings in performance.
[0010] In other aspects, due to the needs of use, the packaging of the electrodes is also used. However, most of these researches focus on the improvement of the movement, storage and anti-pollution of the electrodes. Generally speaking, such packaging belongs to Permanent packaging or one-time packaging, and the packaging material usually uses thermosetting resins. Therefore, it is difficult to simply and effectively recycle the internal electrode materials after use. Even if it is recycled, the effect of recycling such as conductive substrates is very poor.
[0011] Therefore, in the study of electrodes with electrocatalyst layers, there is still room for improvement in the study of reliability and reusability.

Method used

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  • Recyclable electrocatalytic electrode, preparation method and recovery method
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  • Recyclable electrocatalytic electrode, preparation method and recovery method

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preparation example Construction

[0101] The preparation method of the present invention at least comprises the following steps:

[0102] a step of connecting a wire to a conductive substrate, the wire being connected to the conductive substrate through a conductive adhesive;

[0103] the step of depositing an electrocatalyst layer, depositing an electrocatalyst on at least part of the surface of the conductive substrate;

[0104] In the encapsulation step, the conductive substrate, the conductive substrate and the connection point of the conductive substrate are encapsulated by a resin or a resin composition, and only the electrocatalyst layer on the surface of the conductive substrate is exposed to the environment.

[0105] Steps for Connecting Wires to Conductive Substrates

[0106] In the present invention, the connection between the wire and the conductive substrate can be realized by the aforementioned conductive adhesive. Specific ways that can be enumerated include:

[0107] At least a part of one...

Embodiment approach

[0127] The invention provides a method for preparing and recovering an electrocatalytic electrode that can be recycled. In a typical embodiment of the invention, it includes the following steps:

[0128] Step 1) using a surface deposition method to deposit an electrocatalyst layer on a conductive substrate;

[0129] Step 2) Using a conductive adhesive to connect the conductive substrate to the metal wire, encapsulating the conductive substrate with molten hot melt adhesive, exposing the surface of the substrate with a certain area, and making a working electrode;

[0130] The operation sequence of step 1) and step 2) can be interchanged.

[0131] Methods for recycling electrocatalytic electrodes include

[0132] After the electrode is soaked in an organic solvent (a mixture of methanol, ethanol and isopropanol in any proportion), remove the hot-melt adhesive package and remove the connecting wire;

[0133] Put the conductive substrate into the H 2 SO 4 Solution, acetone, i...

Embodiment

[0143] Reference examples and working examples of the present invention are described below.

[0144] Reference example

[0145] Noble metal oxide IrO x Preparation of Powder Dispersion Electrode

[0146] (a) Quartz glass slices with a size of 10×10×1 mm were cut out, cleaned ultrasonically with acetone, isopropanol and ultrapure water (18.2 MΩcm) for 30 min, and then cleaned with N 2 After drying, a 10 nm metal Ti layer was sputtered in a magnetron sputtering vacuum chamber, followed by a 100 nm thick metal Au layer to make an Au conductive substrate.

[0147] (b) Weigh 2.5mg IrO x The electrocatalyst powder sample was transferred to a 2mL glass bottle, and 970μL of isopropanol, 20μL of ultrapure water and 10μL of 5% Nafion solution were added to prepare 1mL of IrO-containing x After ultrasonic treatment for 0.5 h, measure 40 μL of the dispersion and evenly drop it onto the Au conductive substrate in step (a). After drying at room temperature for 10 minutes, use molten...

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Abstract

The invention relates to a recyclable electrocatalytic electrode, a preparation method and a recovery method. The electrode comprises a conductive substrate, a wire, and an electrocatalyst layer formed on at least part of the surface of the substrate. The conductive substrate is connected with the wire through a conductive adhesive, the electrode is packaged through a resin or a resin composition,the package encapsulates the conductive substrate and the connecting point of the conductive substrate and the wire and only makes the electrocatalyst layer on the surface of the conductive substrateexposed in the environment, and the resin or the resin composition comprises a hot-melt adhesive component.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a recyclable electrocatalytic electrode and a preparation and recycling treatment method thereof. Background technique [0002] As global climate change and environmental pollution continue to intensify, there is an increasing desire for alternative clean energy or environmental governance for the use of traditional fossil fuels. Therefore, it is imminent to develop new energy sources with high efficiency and environmental friendliness. With the continuous development of industrial technology, a variety of high-efficiency catalysts have been proposed for the preparation of clean energy or environmental governance. Among them, electrocatalytic hydrogen production, carbon dioxide reduction and fuel cell technology are important means for the development and utilization of new energy. [0003] The development of relevant electrode materials is the key to the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/00C25B11/04G01N27/30G01N27/36G01N27/48H01M4/86H01M4/88
CPCC25B11/00C25B11/051G01N27/304G01N27/307G01N27/308G01N27/36G01N27/48H01M4/8647H01M4/8878H01M4/8892Y02E60/50Y02P20/584
Inventor 李俊华王驰中王荣彭悦陈建军
Owner TSINGHUA UNIV
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