Hydrogen evolution reaction catalyst and preparation method thereof

A technology for hydrogen evolution reaction and catalyst, applied in chemical instruments and methods, physical/chemical process catalyst, chemical/physical process, etc., can solve problems such as unfavorable large-scale preparation and commercial application, harsh reaction conditions, etc., and achieve broad industrial application Prospects, low production cost, strong universal effect

Inactive Publication Date: 2015-11-18
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

This patented technology describes a new type of catalyst made from certain materials called transition metals or diketones. These materials are used with oxygen during chemical reactions for various purposes such as producing clean water through decomposition processes like bacteria. They have unique properties making them ideal candidates for use in these applications due to its ability to efficiently generate energy without generating harmful substances.

Problems solved by technology

This patented technical solution involves developing new types of chemical reactions called hydrocracking reactors where water decomposes into atomic hydroxyl radicals instead of molecular ones like carbon dioxide gas. These chemistries allow for more effective conversion between different forms of matter such as methane, ethene, etc., while still maintaining excellent properties over longer periods of operation without requiring significant investment costs associated therewith.

Method used

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  • Hydrogen evolution reaction catalyst and preparation method thereof
  • Hydrogen evolution reaction catalyst and preparation method thereof
  • Hydrogen evolution reaction catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Take 1g of molybdenum diselenide powder and place it in 100mL of isopropanol, add 2wt% hydrogen peroxide and sonicate for 5 hours, pour off the supernatant after standing still, add 100mL of isopropanol and then sonicate for 5 hours, take the upper nanometer Lamellar dispersion at 50 o C vacuum drying in a vacuum oven for 3 days to remove residual solvents to obtain nanosheet composites.

[0023] from figure 1 It can be seen from the figure that the sheet thickness of the prepared molybdenum diselenide and its oxide nanosheet composites is very small, and the edges are irregular and have some hole structures, indicating that there are many defects in it that may be partially oxidized, and compared with Larger surface area. from figure 2 It can be seen that the prepared nanosheets still retain the crystal structure of molybdenum diselenide, in which figure 2 In a, it can be observed that the interplanar spacing of the nanosheets is 0.68 nm, which corresponds to the...

Embodiment 2

[0025] Take 1g of molybdenum disulfide powder and place it in 120mL isopropanol, add 2wt% hydrogen peroxide and sonicate for 4 hours, pour off the supernatant after standing still, add 120mL isopropanol and then sonicate for 4 hours, take the upper nanosheet after standing still layer dispersion at 50 o C Vacuum drying in a vacuum oven for 4 days to remove residual solvents to obtain nanosheet composites.

[0026] from Figure 5 It can be seen that the catalytic performance of molybdenum disulfide and its oxide nanosheet composites is also greatly improved compared with the molybdenum disulfide nanosheet itself, indicating that this is a kind of hydrogen evolution that can be used to improve the transition metal dichalcogenides. A general approach to catalytic performance.

[0027] Therefore, the catalyst prepared by our method has very good catalytic performance for hydrogen evolution reaction, and its performance is comparable to that of traditional metallic platinum catal...

Embodiment 3

[0029] Take 1g of molybdenum diselenide powder and place it in 150mL N-methylpyrrolidone, add 5wt% hydrogen peroxide and sonicate for 3 hours, pour off the supernatant after standing still, add 150mLN-methylpyrrolidone and then sonicate for 3 hours, take it after standing still The dispersion of the upper nanosheet layer was placed in water and dialyzed for 5 days to remove solvents and other water-soluble impurities. Finally, the product is freeze-dried with a freeze dryer to obtain the product.

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Abstract

The present invention belongs to the field of catalytic materials, and specifically relates to a hydrogen evolution reaction catalyst and a preparation method thereof, wherein the hydrogen evolution reaction catalyst is a nanometer sheet layer composite material of a transition metal disulfide compound and an oxide thereof. According to the present invention, hydrogen peroxide is added during an ultrasonic peeling process to peel the transition metal disulfide compound into a partially-oxidized nanometer sheet layer, the obtained nanometer sheet layer retains the two-dimensional crystal structure of the transition metal disulfide compound and maintains the high electron transport efficiency of the transition metal disulfide compound, and the partially-oxidized defect structure provides more catalytic activity sites for the hydrogen evolution reaction to increase the area density of the catalytic activity sites of the catalyst so as to finally improve the catalytic activity of the catalyst; and the preparation method has characteristics of simple preparation conditions, easy operation process, low production cost and easy mass production, and the product has high catalytic activity, can replace the platinum noble metal hydrogen evolution catalyst, and has broad application prospects.

Description

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Claims

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Application Information

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Owner FUDAN UNIV
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