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Composite nano-material electrocatalyst for efficient hydrogen evolution reaction and preparation method of the composite nano-material electrocatalyst

A composite nanomaterial, hydrogen evolution reaction technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effect of simple process, low cost, and easy to expand application

Pending Publication Date: 2020-06-26
TIANNENG BATTERY GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, this highly efficient hydrogen evolution reaction composite nanomaterial electrocatalyst MoS 2 / B-doped graphene composite nanomaterials and their preparation methods have not yet been publicly reported

Method used

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  • Composite nano-material electrocatalyst for efficient hydrogen evolution reaction and preparation method of the composite nano-material electrocatalyst
  • Composite nano-material electrocatalyst for efficient hydrogen evolution reaction and preparation method of the composite nano-material electrocatalyst
  • Composite nano-material electrocatalyst for efficient hydrogen evolution reaction and preparation method of the composite nano-material electrocatalyst

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Embodiment 1

[0027] Under the action of ultrasonic waves, graphene oxide is evenly dispersed in deionized water to obtain a uniform suspension, and then the metered boric acid solution is added dropwise to the suspension containing graphene oxide under stirring, and continuously stirred for 12h, and then Contains Na 2 MoO 4 The mixed solution of L-cysteine ​​was added to the above-mentioned mixed suspension under stirring to obtain a hydrothermal reaction mixture, which contained 1.5mmol Na 2 MoO 4 , 7.5mmol L-cysteine, 3.0mmol graphene oxide (calculated as carbon element), the amount of material of boric acid content is 1.0, 2.0 or 5.0mmol; the mixture of the above hydrothermal reaction is transferred to 100mL of hydrothermal reaction In the kettle, use deionized water to adjust the volume of the hydrothermal reaction mixture to about 80mL. After the hydrothermal reaction kettle is sealed, keep it warm at 180°C for 24h. After the reaction is completed, the reaction kettle is naturally c...

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Abstract

The invention discloses a composite nano-material electrocatalyst for high-efficiency hydrogen evolution reaction and a preparation method of the composite nano-material electrocatalyst. The electrocatalyst is a composite nano material of MoS2 and B-doped graphene, namely a heterogeneous composite nano material formed by uniformly loading MoS2 layers with more defects and / or edges on the B-doped graphene. The preparation method comprises: in the presence of graphene oxide and boric acid in a hydrothermal solution, and in the presence of Na2MoO4 and L-cysteine, preparing the MoS2 / B-doped graphene composite nano material through a one-step hydrothermal reaction way. The composite nano-material is used as an electrocatalyst of a hydrogen evolution reaction, and the prepared MoS2 / B-doped graphene composite nano material shows quite high electrocatalytic activity and a relatively low Tafel slope (46.3 mV / dec). The MoS2 / B-doped graphene composite nano material disclosed by the invention is used as an efficient and low-cost electrocatalyst for hydrogen evolution reaction, and has a wide application prospect in the aspect of hydrogen production by electrolyzing water.

Description

technical field [0001] The invention relates to a composite nano-material electrocatalyst for efficient hydrogen evolution reaction and a preparation method thereof, in particular to MoS 2 The / B-doped graphene composite nanomaterial electrocatalyst and its preparation method belong to the field of new energy materials and application technology. Background technique [0002] MoS 2 It has a typical layered structure, and its layered structure is formed by connecting and superimposing the S-Mo-S layers of the sandwich structure through the action of van der Waals force. Nanoscale MoS 2 It has good electrocatalytic activity for hydrogen evolution reaction (HER). Although Pt and Pt-based nanomaterials have the optimal electrocatalytic performance for HER, their scarcity and high price limit their large-scale application in water electrolysis for hydrogen production. MoS 2 The electrocatalytic HER activity mainly comes from its edge sites (YAN Y, XIA B Y, GE X M, etal.Ultra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J37/10C25B11/06C25B1/04
CPCB01J27/051B01J37/10C25B1/04C25B11/091B01J35/30B01J35/23B01J35/33Y02E60/36
Inventor 宋文龙陈卫祥施璐李丹田庆山罗秋月刘红杰方明学毛书彦沈旭培李靖袁关锐
Owner TIANNENG BATTERY GROUP
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