A kind of molybdenum disulfide/gold/nitrogen-doped carbon nanotube composite and its preparation method and application
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A complex and nanotechnology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of catalytic performance to be improved, and achieve good adsorption effect and excellent electrical conductivity
Active Publication Date: 2020-08-14
BEIJING NORMAL UNIVERSITY +1
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[0003] NeS 2 、CoS 2 、MoS 2 Transition metal sulfides such as transition metal sulfides have a certain catalytic activity for HER, and have attracted the attention of researchers because of their low price and easy availability, but their catalytic performance needs to be improved.
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Embodiment 1
[0052] This embodiment provides a (Ppy)-MoS 4 , prepared by the following method:
[0053] (1) Nanotubular NO 3 - Synthesis of Ppy
[0054] Weigh 1.937g (4.8mmol) Fe(NO 3 ) 3 9H 2 O, 0.262g (0.8mmol) methyl orange (MO), dissolved in 160ml of deionized water, stirred for 0.5h, added 0.28ml of pyrrole, stirred in an ice-water bath for 4h, washed and dried to obtain a black solid, that is, nanotubular NO 3 -Ppy;
[0055] (2) Synthesis of (Ppy)-MoS by ion exchange method 4
[0056] Synthesis of (Ppy)-MoS by Ion Exchange Method 4 . Add 0.15g NO 3 -Ppy, add 5ml of water, and ultrasonically obtain a dispersion. Another 0.45g (NH 4 ) 2 MoS 4 Add 10ml of water, ultrasonically dissolve it fully, then add dropwise to the above NO 3 -Py dispersion liquid, stirred, and reacted at room temperature for 72h. Stirring, the system gradually changed from black to brown. Suction filtration, and washing with a large amount of water and ethanol until the filtrate is colorless, a bl...
Embodiment 2
[0058] This embodiment provides a (Ppy)-MoS 4 , Compared with Example 1, the difference is only: in step (1), the consumption of methyl orange is 0.5mmol.
Embodiment 3
[0060] This embodiment provides a (Ppy)-MoS 4 , Compared with Example 1, the difference is only in that: in step (1), no ice-water bath is used, and the reaction is directly carried out at room temperature.
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Abstract
The invention relates to a molybdenum disulfide / gold / nitrogen doped carbon nanotube complex and a preparation method and an application thereof. The preparation method comprises: (Ppy)-MoS4 is put into the water body and oscillated by 2-5h, after completion of adsorption, centrifuge is performed to obtain an adsorption product, and that adsorption product is subjected to calcining to obtain the product; wherein the water body contains Au (III); the (Ppy)-MoS4 is prepared by the following method: nanotubular NO3-Ppy is prepared in water as a dispersion, and (NH4) 2MoS4 is added dropwise to thedispersion, and the reaction lasts for 60-80h, after stirring, pumping and filtering, the reaction product is washed with water and ethanol until the filtrate is colorless, and dried to obtain the finished product; the conductivity of N-doped carbon nanotubes obtained by calcination of the elementary substance Au and Ppy obtained by polypyrrole adsorption of gold ion solution will make up for thedefect of insufficient conductivity of MoS2.
Description
technical field [0001] The invention relates to the technical field of electrocatalysts, in particular to a molybdenum disulfide / gold / nitrogen-doped carbon nanotube composite and its preparation method and application. Background technique [0002] In the context of the increasingly serious energy crisis, the development of new energy storage materials has attracted people's attention. Hydrogen is considered to be the most promising clean energy that can replace fossil energy. Hydrogen energy can be obtained directly through the hydrogen evolution reaction (abbreviated as HER) of electrolyzed water, and the HER process requires a high overpotential. Suitable electrocatalysts can significantly reduce this overpotential and realize industrial applications. So far, noble metals represented by platinum (Pt) are still the most powerful electrocatalysts. However, precious metal resources are scarce, expensive, and the production cost is high, which limits its industrialization. ...
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