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Metal phase molybdenum disulfide-based in-plane heterostructure, self-supporting electrode, preparation method and application

A self-supporting electrode, molybdenum disulfide technology, applied in the field of materials, can solve problems such as poor catalytic activity, and achieve the effects of short preparation cycle, broad market prospects, and excellent hydrogen evolution catalytic performance.

Active Publication Date: 2022-07-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a metal-phase molybdenum disulfide-based in-plane heterostructure, self-supporting electrode, preparation method and application, aiming at metal In order to solve the problem of poor catalytic activity of molybdenum disulfide basal surface, the electronic control of basal surface sulfur atom can be carried out by constructing in-plane heterostructure with transition metal sulfide to improve the catalytic activity of basal surface sulfur atom

Method used

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  • Metal phase molybdenum disulfide-based in-plane heterostructure, self-supporting electrode, preparation method and application
  • Metal phase molybdenum disulfide-based in-plane heterostructure, self-supporting electrode, preparation method and application
  • Metal phase molybdenum disulfide-based in-plane heterostructure, self-supporting electrode, preparation method and application

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Embodiment 1

[0030] A metal-phase molybdenum disulfide basal in-plane heterostructure (metal-phase molybdenum disulfide / nickel sulfide in-plane heterostructure), comprising:

[0031] The metal-phase molybdenum disulfide basal in-plane heterostructure is mainly composed of nano-sheets of metal-phase molybdenum disulfide, and the clusters of transition metal sulfides are embedded in the lamellae of metal-phase molybdenum disulfide, namely transition metal sulfides. The clusters replaced part of the molybdenum disulfide clusters in the metallic phase molybdenum disulfide sheets, and in the obtained heterostructure, the transition metal sulfide clusters and the metallic phase molybdenum disulfide were located in the same plane.

[0032] A method for preparing a metal-phase molybdenum disulfide base in-plane heterostructure (metal-phase molybdenum disulfide / nickel sulfide in-plane heterostructure), comprising the following steps:

[0033] Step 1: Weigh 0.1 g of nickel molybdate and 0.8 g of thi...

Embodiment 2

[0037] A self-supporting electrode of a metal phase molybdenum disulfide base in-plane heterostructure (metal phase molybdenum disulfide / nickel sulfide in-plane heterostructure), the self-supporting electrode is specifically grown on a conductive substrate, and is composed of a metal phase Nanosheet array structure formation of molybdenum disulfide-based in-plane heterostructures.

[0038] A preparation method of a self-supporting electrode, comprising the following steps:

[0039] Step 1: Weigh 0.1 g of nickel molybdate and 0.8 g of thiourea into 20 ml of water, and mix well to obtain a solution;

[0040] The second step: transfer the solution into a 50ml reactor, add carbon cloth as a conductive substrate, seal the reactor, and place it in an oven for hydrothermal reaction at 200°C for 24 hours;

[0041] The third step: after the hydrothermal reaction is completed, it is naturally cooled to room temperature, the obtained conductive substrate is taken out, and vacuum dried t...

Embodiment 3

[0043] A self-supporting electrode of a metal phase molybdenum disulfide base in-plane heterostructure (metal phase molybdenum disulfide / nickel sulfide in-plane heterostructure), the self-supporting electrode is specifically grown on a conductive substrate, and is composed of a metal phase Nanosheet array structure formation of molybdenum disulfide-based in-plane heterostructures.

[0044] A preparation method of a self-supporting electrode, comprising the following steps:

[0045] The first step: take nickel molybdate and thiourea by weighing and add them to 20ml of water, and mix well to obtain a mixed solution where nickel molybdate is 0.012 mmol·L-1 and thiourea is 0.24 mmol·L-1;

[0046] The second step: transfer the solution into a 50ml reactor, add carbon cloth as a conductive substrate, seal the reactor, and place it in an oven for hydrothermal reaction at 200°C for 24 hours;

[0047] The third step: after the hydrothermal reaction is completed, it is naturally cooled...

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Abstract

The invention is applicable to the field of materials, and provides a metal-phase molybdenum disulfide-based in-plane heterostructure, which is characterized in that the metal-phase molybdenum disulfide-based in-plane heterostructure takes a nanosheet layer of metal-phase molybdenum disulfide as a main body, and clusters of transition metal sulfide are embedded into the nanosheet layer of the metal-phase molybdenum disulfide, so that the metal-phase molybdenum disulfide-based in-plane heterostructure is obtained. Namely, clusters of transition metal sulfide replace part of molybdenum disulfide clusters in a metal-phase molybdenum disulfide sheet layer, and in the obtained heterostructure, the transition metal sulfide clusters and the metal-phase molybdenum disulfide are located in the same plane. In the heterostructure, the transition metal sulfide which is rich in energy band structure and easy to regulate and control can generate rich sulfur bridges at an interface with the metal phase molybdenum disulfide, so that the electronic structure of sulfur atoms is regulated; in addition, the transition metal sulfide cluster and the metal phase molybdenum disulfide form line / face contact, and a richer heterogeneous phase interface can be formed.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a metal phase molybdenum disulfide base in-plane heterostructure, a self-supporting electrode, a preparation method and an application. Background technique [0002] The metallic phase molybdenum disulfide (1T-MoS2) is a two-dimensional layered structure composed of S-Mo-S stacks. Compared with the semiconductor conductivity of other phases of molybdenum disulfide, the metalloid conductivity of the metallic phase molybdenum disulfide makes it have considerable application prospects in the fields of electrocatalytic hydrogen evolution, nitrogen reduction and other catalytic conversions involving electron transfer. In recent years, the maturation of the hydrothermal / solvothermal synthesis of metal-phase molybdenum disulfide technology has further stimulated its application in the direction of electrocatalysis. However, the basal plane activity of the metallic phase molybdenum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06C01G53/11C01G49/12C01G51/00C01G3/12B82Y40/00B82Y30/00C25B11/091C25B11/065C25B11/054C25B11/056C25B11/063C25B11/061C25B11/031C25B1/04
CPCC01G39/06C01G53/11C01G49/12C01G51/30C01G3/12B82Y40/00B82Y30/00C25B11/091C25B11/065C25B11/054C25B11/056C25B11/063C25B11/061C25B11/031C25B1/04C01P2002/20C01P2004/24C01P2004/80Y02E60/36
Inventor 李楠王凯雯刘志鹏
Owner JILIN UNIV
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