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Two-dimensional titanium carbide supported stable biphase molybdenum diselenide composite material and preparation method and application thereof

A two-dimensional titanium carbide and molybdenum diselenide technology, applied in electrolytic components, electrodes, nanotechnology, etc., can solve the problems of high cost and poor stability of electrocatalytic hydrogen evolution catalysts, achieve good charge conductivity, improve electrical conductivity, Prevent stacking effects

Active Publication Date: 2021-08-13
HARBIN NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high cost and poor stability of existing electrocatalytic hydrogen evolution catalysts, and provide a stable two-phase molybdenum diselenide composite material supported by two-dimensional titanium carbide, its preparation method and application

Method used

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  • Two-dimensional titanium carbide supported stable biphase molybdenum diselenide composite material and preparation method and application thereof
  • Two-dimensional titanium carbide supported stable biphase molybdenum diselenide composite material and preparation method and application thereof
  • Two-dimensional titanium carbide supported stable biphase molybdenum diselenide composite material and preparation method and application thereof

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specific Embodiment approach 1

[0031] Specific Embodiment 1: In this embodiment, a two-dimensional titanium carbide-supported stable dual-phase molybdenum diselenide composite material contains 0.2% to 5% of N elements at an atomic percentage, and titanium carbide is used as MoSe 2 The conductive framework of nanosheets forms a three-dimensional interconnected network structure, MoSe 2 Nanosheets are uniformly grown in situ on the TiC surface; the MoSe 2 The nanosheet is only 1-10 Mo atomic layers thick, and its 002 crystal plane spacing is 0.65-1.00nm, which is a dual-phase coexistence structure of 2H and 1T.

specific Embodiment approach 2

[0032] Specific embodiment two: This embodiment is a preparation method of a stable two-phase molybdenum diselenide composite material supported by two-dimensional titanium carbide, which is completed according to the following steps:

[0033] 1. Na 2 MoO 4 2H 2 O was dissolved in a mixed solution of absolute ethanol and deionized water, stirred until the solution was clear, and then a thin layer of Ti was added 3 C 2 , sonicated to get Na 2 MoO 4 -Ti 3 C 2 solution;

[0034] 2. Add Se powder to N 2 h 4 ·H 2 O solution, and then stirred at a temperature of 20°C to 80°C until the solution turned dark red to obtain Se-N 2 h 4 solution;

[0035] 3. Na 2 MoO 4 -Ti 3 C 2 The solution was added dropwise to Se-N 2 h 4 solution, to obtain a mixed solution; transfer the mixed solution to a polytetrafluoroethylene kettle, and then perform a hydrothermal reaction to obtain a reaction product; wash the reaction product, and then dry it to obtain a two-dimensional titani...

specific Embodiment approach 3

[0036] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the Na described in step one 2 MoO 4 2H 2 The mass ratio of O to the mixed solution of absolute ethanol and deionized water is (0.1g-0.2g): 100mL. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a two-dimensional titanium carbide supported stable biphase molybdenum diselenide composite material as well as a preparation method and application thereof, and relates to a composite hydrogen evolution catalyst and a preparation method thereof. The invention aims to solve the problems of high cost and poor stability of the existing electrocatalytic hydrogen evolution catalyst. The two-dimensional titanium carbide supported stable biphase molybdenum diselenide composite material contains an N element with the atomic percentage being 0.2%-5%, titanium carbide serves as a conductive framework of MoSe2 nanosheets to form three-dimensional network structures which are communicated with one another, and the MoSe2 nanosheets evenly grow on the surface of the titanium carbide in an in-situ mode. The method comprises the following steps of: 1, preparing a Na2MoO4-Ti3C2 solution; 2, preparing a Se-N2H4 solution; and 3, mixing and carrying out hydrothermal reaction. The two-dimensional titanium carbide supported stable two-phase molybdenum diselenide composite material is used as a catalyst for producing hydrogen by electrolyzing water. The two-dimensional titanium carbide supported stable two-phase molybdenum diselenide composite material can be obtained.

Description

technical field [0001] The invention relates to a composite hydrogen evolution catalyst and a preparation method thereof. Background technique [0002] In order to solve the energy crisis, people continue to explore and develop new clean energy. Hydrogen energy has broad development potential and is expected to replace traditional energy and become an ideal energy carrier in the future. The technology of hydrogen production by electrolysis of water is expected to combine water splitting with excess electricity during off-peak periods, the endless but intermittent solar and wind power generation on the earth, and realize the vision of large-scale hydrogen production. At present, rare precious metals such as platinum are currently the most effective hydrogen evolution catalysts due to their small overpotential, low Tafel slope and other advantages. However, the disadvantages of high cost and low natural reserves of platinum-based precious metals severely limit its wide appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B1/04B82Y40/00
CPCC25B1/04B82Y40/00Y02E60/36Y02P20/133
Inventor 武立立张喜田邵智韬马新志卢会清
Owner HARBIN NORMAL UNIVERSITY
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