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Flowerlike carbon-loaded MoS<2> nano-particle composite and preparation method thereof

A nanoparticle and composite material technology, applied in the field of hydrogen evolution catalytic materials and its preparation, can solve the problems of large environmental pollution and high cost, and achieve the effects of low production cost, convenient operation, and excellent long-term stability

Inactive Publication Date: 2015-12-09
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although graphene and carbon nanotubes of various structures are often used to support MoS 2 Nanoparticles, but the preparation process of these conductive substrates is often costly and environmentally polluting

Method used

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  • Flowerlike carbon-loaded MoS&lt;2&gt; nano-particle composite and preparation method thereof
  • Flowerlike carbon-loaded MoS&lt;2&gt; nano-particle composite and preparation method thereof
  • Flowerlike carbon-loaded MoS&lt;2&gt; nano-particle composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025](1) Disperse 100mg of the synthesized flower-shaped ZnO in 10ml of deionized water, sonicate for 20min, then add 100mg of glucose, and sonicate for 10min; then transfer the mixture to a pressure furnace and place it in an oven at 180°C for 24h; wait for natural cooling After reaching room temperature, the product was taken out and washed repeatedly by centrifugation with absolute ethanol for 5 times; then the product was dried in an oven at 60°C for 6 hours;

[0026] (2) Take 1.0 g of the dried powder and place it in a tube furnace, heat it to 800 °C for 2 h at a heating rate of 5 °C / min under the protection of nitrogen, and then cool it to room temperature under the protection of gas. Then, the heat-treated material was treated with 2M HCl for 1 h, then centrifugally washed with deionized water and ethanol for several times, and dried in an oven at 60°C to obtain flower-shaped carbon;

[0027] (3) Weigh 22mg of ammonium tetrathiomolybdate and add it to 10ml of DMF, ultr...

Embodiment 2

[0030] Weigh 40mg of ammonium tetrathiomolybdate and add it to 10ml of DMF, ultrasonicate for 10min to fully dissolve the ammonium tetrathiomolybdate; add 0.1ml of hydrazine monohydrate, then transfer the mixture to an autoclave, and place it in an oven at 200°C for reaction 18h; After naturally cooling to room temperature, the material liquid was taken out and washed with deionized water for 6 times; then the reactant was dried in a vacuum oven at 30°C for 12h to obtain the final MoS 2 Nanoparticle hydrogen evolution catalytic material.

[0031] from Figure 5 It can be seen that ammonium tetrathiomolybdate itself solvothermally obtains a nano-flower-like structure. Its hydrogen evolution catalytic performance is very poor.

Embodiment 3

[0033] (1) Disperse 100mg of the synthesized flower-shaped ZnO in 10ml of deionized water, sonicate for 20min, then add 100mg of glucose, and sonicate for 10min; then transfer the mixture to a pressure furnace and place it in an oven at 180°C for 24h; wait for natural cooling After reaching room temperature, the product was taken out and washed repeatedly by centrifugation with absolute ethanol for 5 times; then the product was dried in an oven at 60°C for 6 hours;

[0034] (2) Take 1.0 g of the dried powder and place it in a tube furnace, heat it to 800 °C for 2 h at a heating rate of 5 °C / min under the protection of nitrogen, and then cool it to room temperature under the protection of gas. Then, the heat-treated material was treated with 2M HCl for 1 h, then centrifugally washed with deionized water and ethanol for several times, and dried in an oven at 60°C to obtain flower-shaped carbon;

[0035] (3) Weigh 10mg of ammonium tetrathiomolybdate and add it to 10ml of DMF, son...

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Abstract

The invention belongs to the field of catalytic materials and particularly provides a flowerlike carbon-loaded MoS<2> nano-particle composite and a preparation method thereof. The preparation method comprises the steps that firstly, flowerlike ZnO serves as a template and biomass serves as a precursor, and flowerlike carbon is obtained through a simple hydrothermal method and subsequent high-temperature heat treatment and acid etching; then the obtained flowerlike carbon and ammonium tetrathiomolybdate are subjected to solvothermal processing, and the composite in which MoS<2> nano-particles are evenly loaded on the flowerlike carbon is obtained. Hydrogen evolution catalysis tests indicate that the composite is low in hydrogen evolution take-off potential and Tafele slope and good in long-term stability, wherein the hydrogen evolution take-off potential is approximately 110 mV, and the Tafele slope is 65 mV / dec. According to the flowerlike carbon-loaded MoS<2> nano-particle composite and the preparation method thereof, the biomass which is wide in source serves as the precursor of the flowerlike carbon, a two-step method, namely the hydrothermal processing and the solvothermal processing, is adopted, the operation is simple, the production cost is low, little pollution is caused to the environment, the serial production and large-scale production are easy to achieve, and the flowerlike carbon-loaded MoS<2> nano-particle composite has a good industrial production basis and a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a hydrogen evolution catalytic material and its preparation method and application. Background technique [0002] In today's world, the rapid growth of population and industry's greater demand for energy and the resulting environmental crisis make the development of more efficient and environmentally friendly energy sources more and more urgent. Among them, hydrogen energy, as the most potential energy source, is considered to be likely to replace fossil energy in the future due to its high combustion calorific value and recyclable characteristics. At present, electrochemical hydrogen production is still a widely used method for producing hydrogen. In order to improve the efficiency of electrochemical hydrogen production, it is often necessary to use a catalyst that can reduce the hydrogen evolution overpotential. Platinum-based catalysts are considered t...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/02B82Y30/00B82Y40/00C01B3/04
CPCY02E60/36
Inventor 王雄伟武培怡
Owner FUDAN UNIV
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