heteroatom nitrogen surface modification mos 2 Preparation and Application of Nanomaterials

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 The effect of large-scale production and mild reaction conditions

Active Publication Date: 2021-06-29
QINGDAO UNIV OF SCI & TECH
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  • 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 and difficulty in wide application, and high overpotential of non-noble metal catalysts to waste energy, 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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  • heteroatom nitrogen surface modification mos <sub>2</sub> Preparation and Application of Nanomaterials
  • heteroatom nitrogen surface modification mos <sub>2</sub> Preparation and Application of Nanomaterials
  • heteroatom nitrogen surface modification mos <sub>2</sub> Preparation and Application of Nanomaterials

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Effect test

Embodiment 1

[0023] The first step: the carbon cloth (3*3cm 2 ) in acetone, ethanol, and water for 10 minutes in sequence, and set aside;

[0024] The 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 completely 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] The first step: the carbon cloth (3*3cm 2 ) in acetone, ethanol, and water for 10 minutes in sequence, and set aside;

[0028] The 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 completely 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] In the fourth step, 10mL of ammonia water is placed in the reactor, and the MoS 2 The nanosheets are placed above the ammonia water without contact with the ammonia water, and the reaction kett...

Embodiment 3

[0032] The first step: the carbon cloth (3*3cm 2 ) in acetone, ethanol, and water for 10 minutes in sequence, and set aside;

[0033] The 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 completely 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] In the fourth step, 5mL of ammonia water is placed in the reactor, and the MoS 2 The nanosheets are placed above the ammonia water without contact with the ammonia water, and the reaction kettl...

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Abstract

A Heteroatom Nitrogen Surface Modified MoS 2 The preparation and application of nanometer materials belong to the technical field of electrocatalytic material synthesis. The prepared catalyst has excellent electrocatalytic oxygen evolution performance. The preparation process includes the following steps: (1) carbon cloth (3*3cm) is ultrasonicated in acetone, ethanol, and water for 10 minutes; (2) ammonium molybdate and thiourea are mixed in water in proportion and reacted with clean carbon cloth React at high temperature in the kettle. After cooling down to room temperature, rinse the carbon cloth with ethanol and water in turn, and dry it; (3) the MoS obtained in step (2) 2 Nanosheets and ammonia water are placed in a reactor at high temperature for a certain period of time to obtain heteroatom nitrogen-modified MoS 2 nanomaterials. The catalyst obtained in the invention exhibits excellent electrocatalytic performance, has a simple preparation process and low 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 an alternative to 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. Electrolyzed 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 electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24H01M4/90H01M4/88C25B1/02C25B11/04C25B11/075
CPCB01J27/24B01J35/0033C25B1/02C25B11/075H01M4/8825H01M4/9091Y02E60/50
Inventor 吴则星宋敏刘希恩
Owner QINGDAO UNIV OF SCI & TECH
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