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Preparation and application of heteroatom nitrogen surface modified MoS2 nano-material

A nano-material and surface modification technology, applied in chemical/physical processes, physical/chemical process catalysts, structural parts, etc., can solve the problems of low oxygen evolution activity and complex catalyst preparation methods, and achieve simple reaction process and suitable for Large-scale production, the effect of improving the catalytic performance of oxygen evolution

Active Publication Date: 2020-02-14
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems of high price of noble metal catalysts, low reserves, difficulty in wide application and high overpotential waste of energy of non-noble metal catalysts, the present invention provides a heteroatom nitrogen surface modified MoS 2 The preparation and application of nanomaterials solve the current MoS 2 The catalyst preparation method is complicated and the technical problem of oxygen evolution activity is not high

Method used

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  • Preparation and application of heteroatom nitrogen surface modified MoS2 nano-material
  • Preparation and application of heteroatom nitrogen surface modified MoS2 nano-material
  • Preparation and application of heteroatom nitrogen surface modified MoS2 nano-material

Examples

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Effect test

Embodiment 1

[0023] Step 1: Sonicate carbon cloth (3*3cm) in acetone, ethanol, and water for 10 minutes, and set aside;

[0024] Second step: mix ammonium molybdate and thiourea in water in proportion, wherein the molar ratio of ammonium molybdate and thiourea is 1:5, and the volume of water is 35mL and stirred until fully dissolved to obtain a uniform solution;

[0025] Step 3: Transfer the uniformly stirred solution to a reaction kettle with a stainless steel substrate and put it into an ultrasonically passed carbon cloth, and place the reaction kettle in a blast drying oven at 180°C for 12 hours; after cooling down to room temperature, put The carbon cloth was taken out and rinsed with ethanol and water in turn, and dried to obtain MoS 2 nanosheet catalysts.

Embodiment 2

[0027] Step 1: Sonicate carbon cloth (3*3cm) in acetone, ethanol, and water for 10 minutes, and set aside;

[0028] Second step: mix ammonium molybdate and thiourea in water in proportion, wherein the molar ratio of ammonium molybdate and thiourea is 1:5, and the volume of water is 35mL and stirred until fully dissolved to obtain a uniform solution;

[0029] Step 3: Transfer the uniformly stirred solution to a reaction kettle with a stainless steel substrate and put it into an ultrasonically passed carbon cloth, and place the reaction kettle in a blast drying oven at 180°C for 12 hours; after cooling down to room temperature, put The carbon cloth was taken out and rinsed with ethanol and water in turn, and dried to obtain MoS 2 nanosheet catalysts.

[0030] The fourth step: 10mL of ammonia water is placed in the reaction kettle, and the MoS 2 The nanosheets are placed above the ammonia water without contact with the ammonia water, and the reaction kettle is placed in a blast...

Embodiment 3

[0032] Step 1: Sonicate carbon cloth (3*3cm) in acetone, ethanol, and water for 10 minutes, and set aside;

[0033] Second step: mix ammonium molybdate and thiourea in water in proportion, wherein the molar ratio of ammonium molybdate and thiourea is 1:5, and the volume of water is 35mL and stirred until fully dissolved to obtain a uniform solution;

[0034] Step 3: Transfer the uniformly stirred solution to a reaction kettle with a stainless steel substrate and put it into an ultrasonically passed carbon cloth, and place the reaction kettle in a blast drying oven at 180°C for 12 hours; after cooling down to room temperature, put The carbon cloth was taken out and rinsed with ethanol and water in turn, and dried to obtain MoS 2 nanosheet catalysts.

[0035] The fourth step: 5mL of ammonia water is placed in the reaction kettle, and the MoS 2 The nanosheets are placed above the ammonia water and not in contact with the ammonia water. The reaction kettle is placed in a blast d...

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Abstract

Belonging to the technical field of electro-catalytic material synthesis, the invention discloses preparation and application of a heteroatom nitrogen surface modified MoS2 nano-material. The preparedcatalyst has excellent electrocatalytic oxygen evolution performance. The preparation process comprises the steps of: (1) carrying out ultrasonic treatment on carbon cloth (3*3cm) in acetone, ethanoland water respectively for 10min; (2) mixing ammonium molybdate and thiourea uniformly in proportion in water, carrying out high-temperature reaction with clean carbon cloth in a reaction kettle, then performing cooling to room temperature, washing the carbon cloth with ethanol and water in sequence, and performing drying; and (3) putting the MoS2 nanosheet obtained in step (2) and ammonia waterinto a reaction kettle, and carrying out high-temperature reaction for a certain period of time to obtain the heteroatom nitrogen modified MoS2 nano-material. The catalyst obtained by the invention shows excellent electrocatalytic performance, and the preparation process is simple and low in cost, and is suitable for large-scale production.

Description

technical field [0001] The technical field of electrocatalytic material synthesis, specifically related to a heteroatom nitrogen surface modified MoS 2 Preparation and application of nanomaterials. Background technique [0002] As a substitute for traditional fossil fuels, hydrogen energy has attracted widespread attention due to its high energy density, zero pollution emissions, and abundant reserves. Water electrolysis offers an ideal method for the production of renewable pure hydrogen without by-products. Electrolysis of water consists of two half-reactions, hydrogen evolution at the cathode and oxygen evolution at the anode. Among them, the anode oxygen evolution reaction is a four-electron-proton coupling reaction, which requires higher energy (higher overpotential), so that the oxygen evolution overpotential is much higher than the theoretical decomposition voltage of water (1.23V). To reduce the overpotential and facilitate the reaction kinetics during water elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24H01M4/90H01M4/88C25B1/02C25B11/06
CPCB01J27/24H01M4/9091H01M4/8825C25B1/02C25B11/075B01J35/33Y02E60/50
Inventor 吴则星宋敏刘希恩
Owner QINGDAO UNIV OF SCI & TECH
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