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Preparation method of copper foam/reduced graphene cluster/ni/cr as cathode for electrolysis of water

A technology of graphene clusters and copper foam, which is applied in the field of electrolysis of water, can solve the problems of low hydrogen evolution activity of nickel-based catalysts, and achieve the effects of low catalytic activity, improved stability, and good conductivity

Inactive Publication Date: 2018-09-25
UNIV OF JINAN
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the problem of low hydrogen evolution activity of nickel-based catalysts in acidic media, and provides a method for preparing foamed copper / reduced graphene clusters / Ni / Cr composite materials used as electrolyzed water cathodes in acidic media

Method used

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  • Preparation method of copper foam/reduced graphene cluster/ni/cr as cathode for electrolysis of water
  • Preparation method of copper foam/reduced graphene cluster/ni/cr as cathode for electrolysis of water

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specific Embodiment approach 1

[0018] Specific embodiment one: the preparation method of the copper foam / reduced graphene cluster / Ni / Cr used as electrolyzed water cathode of the present embodiment is carried out according to the following steps:

[0019] (1) Preparation of reduced graphene colloidal solution: a. Weigh 0.5~1.0 g of cationic surfactant, add it to the mixed solution of 1000 ml water+isopropanol+sodium citrate, stir at room temperature for 10~ After 60 min, add 0.5-1.5 g of reduced graphene sheets; b. After stirring for 1 h at room temperature, use an ultrasonic cell pulverizer for 1 h; c. Repeat steps b1-10 times to complete the preparation of the reduced graphene colloid;

[0020] (2) Preparation of anionic polyacrylamide solution: d. Dissolve anionic polyacrylamide with a concentration of 1.0~1.5 g / L in deionized water, stir at room temperature for 2~3 h to obtain anionic polyacrylamide Amide solution;

[0021] (3) Pre-treatment of foamed copper: e. Sonicate the foamed copper by immersing i...

specific Embodiment approach 2

[0026]Specific embodiment two: the difference between this embodiment and specific embodiment one is that the cationic surfactant described in step (1) a is cetyl trimethyl ammonium bromide or cetyl trimethyl ammonium bromide One of ammonium chloride. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Specific embodiment three: what this embodiment is different from specific embodiment one or two is that in the mixed solution of water+isopropanol+sodium citrate described in the a of step (1), the volume ratio of water and isopropanol is 0.3~0.8, the concentration of sodium citrate in the mixed solution is 20~65 g / L. Others are the same as in the first or second embodiment.

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Abstract

The preparation method of foamed copper / reduced graphene cluster / Ni / Cr used as electrolyzed water cathode, the present invention relates to a kind of foamed copper / reduced graphene cluster / Ni / Cr used as electrolyzed water cathode in acidic medium Preparation. The invention aims to solve the problem of low electrolytic hydrogen production activity of the nickel-based catalyst in acidic medium. Preparation method of foamed copper / reduced graphene cluster / Ni / Cr used as electrolyzed water cathode: (1) preparation of reduced graphene colloidal solution; (2) preparation of anionic polyacrylamide solution; (3) copper foam Pretreatment; (4) Self-assembly of reduced graphene clusters on the surface of copper foam; (5) Electroplating of nickel; (6) Electroplating of island-shaped chromium to prepare a composite catalytic layer of reduced graphene clusters / Ni / Cr on the surface of copper foam. The copper foam / reduced graphene cluster / Ni / Cr composite used as cathode for water electrolysis can effectively improve the catalytic activity of nickel-based catalysts in acidic media.

Description

technical field [0001] The invention belongs to the field of electrolyzed water, and relates to a method for preparing a copper foam / reduced graphene cluster / Ni / Cr composite material used as a cathode for electrolyzed water in an acidic medium. Background technique [0002] Electrolysis of water can convert unstorable electrical energy into storable chemical energy, and the carrier hydrogen for storing chemical energy is also an important resource to replace fossil energy in the future. Therefore, electrolytic hydrogen production is an important topic facing the world today, and how to convert higher chemical energy storage carriers more efficiently with lower electrical energy consumption is the top priority of this topic. [0003] In order to improve the energy conversion efficiency of electrolyzed water, the catalytic activity of the cathode must be improved. For the catalytic activity of the cathode, the two most influential factors are the nature of the catalyst and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/04C25B11/06C25B1/04C25D3/12C25D3/04C25D5/14C23C26/00C23C28/00
CPCC23C26/00C23C28/32C23C28/34C25B1/04C25D3/04C25D3/12C25D5/14C25B11/051C25B11/091Y02E60/36
Inventor 田栋梁慧颖李舒曼黄太仲夏方诠周长利
Owner UNIV OF JINAN
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