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Selenium rhenium sulfide composite two-dimensional material and preparation method and application thereof

A two-dimensional material, rhenium sulfide technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as inability to expose active sites, catalytic performance to be improved, and small active surface area. Achieve the effect of improving electrocatalytic performance, better catalytic performance, and simple process steps

Active Publication Date: 2017-11-21
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently reported rhenium-based chalcogenide electrocatalysts have poor electrical conductivity, are easy to agglomerate, have a small active surface area, and cannot expose more active sites, and their catalytic performance still needs to be improved.

Method used

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  • Selenium rhenium sulfide composite two-dimensional material and preparation method and application thereof
  • Selenium rhenium sulfide composite two-dimensional material and preparation method and application thereof
  • Selenium rhenium sulfide composite two-dimensional material and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0028] This embodiment provides a rhenium selenium sulfide composite two-dimensional material (ReSe x S 2-x / CFP) preparation method, it comprises the steps:

[0029] (a) Take 0.1mmol ammonium perrhenate powder (NH 4 ReO 4 ) and thiourea (0.05mmol) were placed in 25ml DMF, and ultrasonically dissolved to form the first solution;

[0030] (b) Get 0.2mmol selenium powder and place it in 5ml hydrazine hydrate, and get the second solution after dissolving;

[0031] (c) After mixing the first solution and the second solution, pour the substrate (a piece of carbon paper of 1 cm × 3.5 cm, referred to as CFP, and place the carbon paper in acetone and ethanol for ultrasonic cleaning for 15 minutes each, After drying, put it into a 50mL polytetrafluoroethylene liner, leaning against the inner wall of the reactor), then put the inner tank into a stainless steel reactor, tighten the lid of the reactor, and place it in an oven at 200 ℃ for 30 hours; after the reaction is finished and ...

Embodiment 2

[0033] This embodiment provides a rhenium selenium sulfide composite two-dimensional material (ReSe x S 2-x / CFP) preparation method, which is basically the same as in Example 1, except that 0.1 mmol of thiourea is added in step (a), and the resulting product is expressed as ReSe by EDX element ratio result 1.78 S 0.22 / CFP, its SEM picture is as follows figure 2 As shown, the TEM image is shown in image 3 Shown, and the XRD curve is listed in such as Figure 4 middle.

Embodiment 3

[0035] This embodiment provides a rhenium selenium sulfide composite two-dimensional material (ReSe x S 2-x / CFP) preparation method, which is basically the same as in Example 1, except that 0.2mmol of thiourea is added in step (a), and the product obtained is expressed as ReSe according to the EDX element ratio result 1.66 S 0.34 / CFP, its XRD curve is listed as Figure 4 middle.

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Abstract

The invention relates to a selenium rhenium sulfide composite two-dimensional material and a preparation method and application thereof; the preparation method comprises the steps of (a) dissolving ammonium perrhenate and thiourea in an organic solvent to form a first solution; (b) dissolving selenium powder in hydrazine hydrate to obtain a second solution; (c) mixing the first solution and the second solution, and pouring the mixture in a reactor with a substrate to carry out hydrothermal reaction; after the hydrothermal reaction, cooling, and taking out the substrate. By controlling minor doping of sulfur, a selenium rhenium sulfide nanosheet with high coverage, good distribution uniformity and small size is obtained on the substrate, the size of the nanosheet reaches 50-100 nm; the nanosheet with high coverage and vertical growth can provide larger specific surface area, and greater current density is provided in electric catalysis. By adjusting doping quantity of sulfur, the electronic structure of the material is adjusted, hydrogen absorption free energy of the material is lowered, conductivity of the material is improved, more defects and active sites are created, and the electrocatalytic performance of the material is improved.

Description

technical field [0001] The invention belongs to the field of electrocatalysts, and relates to a rhenium selenium sulfide composite two-dimensional material, in particular to a rhenium selenium sulfide composite two-dimensional material, a preparation method and an application thereof. Background technique [0002] Energy is the basis of human activities and the material premise of the development of human society. Compared with traditional fossil energy (such as coal, petroleum, etc.), hydrogen energy is a clean, efficient and renewable ideal energy source, which can be obtained from water. The product of complete combustion is water, which will not pollute the environment and is the cleanest green energy. Hydrogen energy is regarded as the clean energy with the most development potential in the 21st century. Human beings have been interested in the application of hydrogen energy since 200 years ago. Since the 1970s, hydrogen energy research has been widely carried out in ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J35/02B01J37/10C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/0573B01J37/10B01J35/40Y02E60/36
Inventor 孙迎辉夏宇飞黄建文吴问奇邹贵付
Owner SUZHOU UNIV
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