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A method for constructing a catalytic hydrogen evolution electrode with fully exposed molybdenum disulfide active sites

A molybdenum disulfide and hydrogen evolution electrode technology, applied in electrodes, replication/marking methods, electrolysis components, etc., can solve the problems of easy-to-stack space structure design methods, large size of lamellae, lack of lamellae, etc., and achieve mass production. , the effect of increasing quantity and low preparation cost

Active Publication Date: 2020-08-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of existing molybdenum disulfide sheets with large size, easy accumulation between sheets, and lack of spatial structure design means that can expose more active sites, the present invention provides a catalytic hydrogen evolution electrode that fully exposes molybdenum disulfide active sites construction method

Method used

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  • A method for constructing a catalytic hydrogen evolution electrode with fully exposed molybdenum disulfide active sites
  • A method for constructing a catalytic hydrogen evolution electrode with fully exposed molybdenum disulfide active sites
  • A method for constructing a catalytic hydrogen evolution electrode with fully exposed molybdenum disulfide active sites

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Embodiment 1

[0051] 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 an 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 / Polyvinylpyrrolidone / reduced graphene oxide dispersion (ie, molybdenum disulfide nanosheet dispersion) is the active material for catalytic hydrogen evolution.

[0052] Molybdenum disulfide / polyvinylpyrrolidone / reduced graphene oxide was spray-printed on a Teslin paper base covered with a copper conductive film by inkjet printing. Its patterned configuration is as follows: First, use a plane figure (area 0.5...

Embodiment 2

[0056] 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 an 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 / Polyvinylpyrrolidone / reduced graphene oxide dispersion (ie, molybdenum disulfide nanosheet dispersion) is the active material for catalytic hydrogen evolution.

[0057] Molybdenum disulfide / polyvinylpyrrolidone / reduced graphene oxide was spray-printed on a Teslin paper base covered with a copper conductive film by inkjet printing. Its patterned configuration is as follows: First, use a plane figure (area 0.5...

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Abstract

The invention belongs to the technical field of two-dimensional material preparation and catalytic hydrogen evolution, and in particular relates to a method for constructing a catalytic hydrogen evolution electrode that fully exposes molybdenum disulfide active sites. Aiming at the problem of low abundance of active sites for catalytic hydrogen evolution in existing molybdenum disulfide nanosheets, the technical core of the present invention includes the following points: [1] Immobilize molybdenum disulfide by printing method to build a three-dimensional catalytic hydrogen evolution electrode; [2 ] Incorporate the surfactant polyvinylpyrrolidone to assist in stripping molybdenum disulfide and prevent the re-agglomeration of molybdenum disulfide nanoflakes; [3] incorporate reduced graphene oxide to provide anchor points for the dispersion of molybdenum disulfide nanoflakes Stacking of molybdenum disulfide nanoflakes; [4] choose a carrier with high surface roughness as the electrode substrate. 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 two-dimensional material preparation and electrocatalytic hydrogen evolution, and in particular relates to a method for constructing a catalytic hydrogen evolution electrode that fully exposes molybdenum disulfide active sites. Background technique [0002] Traditional fossil fuels are gradually being replaced by new sustainable energy sources due to serious environmental pollution problems and the non-renewability of fuels. As an efficient and clean energy carrier, hydrogen energy is regarded as an ideal substitute for traditional fossil fuels. However, the low efficiency of hydrogen production and the complexity of the production process restrict the development of hydrogen energy. [0003] 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 realizati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/06B41M5/00
CPCB41M5/0023B41M5/0047B41M5/0058C25B1/04C25B11/095Y02E60/36
Inventor 陈金菊李培真冯哲圣王焱陈龙
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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