A method for reducing charge transfer resistance of molybdenum disulfide-based catalytic hydrogen evolution electrode

A molybdenum disulfide and hydrogen evolution electrode technology, applied in the field of catalytic hydrogen evolution, can solve the problems of low carrier transport efficiency and low catalytic hydrogen evolution activity, and achieve the effects of high catalytic hydrogen evolution activity, simple technical scheme, and improved electron transport efficiency.

Active Publication Date: 2020-05-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] In view of the low carrier transport efficiency between the existing molybdenum disulfide nanosheets and between them and the conductive substrate, and the semiconductor phase molybdenum disulfide (2H-MoS 2 ) for the problem of low catalytic hydrogen evolution activity, the present invention provides a method for reducing the charge transfer impedance of molybdenum disulfide-based catalytic hydrogen evolution electrodes, the purpose of which is to: mix polyvinylpyrrolidone to make molybdenum disulfide phase change in the liquid phase stripping process, The metallic phase molybdenum disulfide (1T-MoS 2 ); the uniform doping of reduced graphene oxide significantly improves the carrier transport efficiency between molybdenum disulfide nanosheets; the copper film electrode with catalytic hydrogen evolution activity is selected as the electrode substrate, which effectively improves the current carrying between molybdenum disulfide and the electrode substrate subtransfer efficiency

Method used

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  • A method for reducing charge transfer resistance of molybdenum disulfide-based catalytic hydrogen evolution electrode
  • A method for reducing charge transfer resistance of molybdenum disulfide-based catalytic hydrogen evolution electrode
  • A method for reducing charge transfer resistance of molybdenum disulfide-based catalytic hydrogen evolution electrode

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preparation example Construction

[0043] Further preferably, the preparation method of copper film electrode comprises the steps:

[0044] [1] Soak the rigid or flexible carrier material in an aqueous surface modifier solution for surface treatment;

[0045] [2] Transfer the catalyst ink used to catalyze the chemical deposition of copper to the surface of the rigid or flexible carrier after the treatment in step [1] by soaking or printing, and perform pre-chemical deposition treatment;

[0046] [3] Soak the rigid or flexible support after the chemical deposition pretreatment in step [2] in a deposition solution containing copper ions to perform chemical catalytic deposition to obtain a copper thin film electrode.

[0047] Further preferably, the method of preparing the catalytically active functional layer covered on the electrode substrate by using the mixed dispersion of molybdenum disulfide nanoflakes, polyvinylpyrrolidone and reduced graphene oxide is: drop coating, spray coating or printing.

[0048] The...

Embodiment 1

[0050] Mix 10mL of ethanol and 10mL of deionized water in a beaker, add 40mg of polyvinylpyrrolidone, then weigh 200mg of molybdenum disulfide powder raw material and disperse it in the mixed solution to prepare a molybdenum disulfide suspension. Transfer the molybdenum disulfide suspension to the ultrasonic tank for liquid phase stripping, and centrifuge the molybdenum disulfide suspension after liquid phase ultrasonic treatment, and take two-thirds of the supernatant from the centrifuge tube to obtain molybdenum disulfide nanometer The mixed dispersion of flakes and polyvinylpyrrolidone is the active material for catalytic hydrogen evolution.

[0051] Soak the Teslin paper base in the stannous chloride solution for 10 minutes to modify the surface of the paper base, then take out the Teslin paper base and dry it; then use the printing method to print the solution containing silver ions on the surface-modified Teslin paper base surface; finally, the Teslin paper base with sil...

Embodiment 2

[0057] Mix 10mL ethanol and 10mL deionized water in a beaker, add 40mg of polyvinylpyrrolidone, then weigh 200mg of molybdenum disulfide powder raw material and 20mg of reduced graphene oxide powder raw material and disperse them in the mixed solution to prepare molybdenum disulfide suspension. Transfer the molybdenum disulfide suspension to the ultrasonic tank for liquid phase stripping, and centrifuge the molybdenum disulfide suspension after liquid phase ultrasonic treatment, and take two-thirds of the supernatant from the centrifuge tube to obtain molybdenum disulfide nanometer The mixed dispersion of flakes, polyvinylpyrrolidone and reduced graphene oxide is the active material for catalytic hydrogen evolution.

[0058] Soak the Teslin paper base in the stannous chloride solution for 10 minutes to modify the surface of the paper base, then take out the Teslin paper base and dry it; then use the inkjet printing method to print the solution containing silver ions on the sur...

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Abstract

The invention belongs to the technical field of catalytic hydrogen evolution, and in particular relates to a method for reducing the charge transfer resistance of a molybdenum disulfide-based catalytic hydrogen evolution electrode. Aiming at the existing problems of low carrier transport efficiency between molybdenum disulfide nanosheets and between them and the bottom electrode, and low catalytic hydrogen evolution activity of semiconductor 2H phase molybdenum disulfide, the technical core of the present invention includes the following contents: [1] Add polyvinylpyrrolidone to make molybdenum disulfide change from semiconductor 2H phase to metal 1T phase; [2] uniformly introduce reduced graphene oxide to form a three-dimensional conductive network, and improve the electrical contact between molybdenum disulfide sheets and the bottom electrode; [3] As a conductive substrate, the copper thin film electrode has excellent electrical contact with the catalytically active functional layer, which can effectively improve the charge transfer efficiency. The invention is suitable for catalyzing hydrogen evolution reaction in acid solution at normal temperature.

Description

technical field [0001] The invention belongs to the technical field of catalytic hydrogen evolution, and in particular relates to a method for reducing the charge transfer resistance of a molybdenum disulfide-based catalytic hydrogen evolution electrode. Background technique [0002] With the consumption of traditional fossil energy and the increasingly serious environmental pollution, hydrogen energy, as an efficient and clean energy carrier, is regarded as an ideal substitute for traditional energy. How to obtain hydrogen efficiently and sustainably is an important part of the hydrogen economic cycle. Hydrogen production by electrolysis of water is considered to be an important way to sustainably obtain hydrogen, and the design of efficient electrocatalytic hydrogen evolution materials is the key to the realization of this technology. At present, the core task in the field of hydrogen production by electrolysis of water is to solve the contradiction between high hydrogen ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/06
CPCC25B1/04C25B11/051C25B11/057C25B11/075Y02E60/36
Inventor 冯哲圣李培真陈金菊王焱陈龙
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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