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NiSe2 transition metal chalcogenide nanosheet as well as preparation method and application thereof

A technology of chalcogenides and transition metals, applied in the direction of metal selenide/telluride, chemical instruments and methods, binary selenium/tellurium compounds, etc., to achieve high catalytic efficiency and large specific surface area

Inactive Publication Date: 2017-02-22
UNIV OF SCI & TECH OF CHINA
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  • Claims
  • Application Information

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Problems solved by technology

[0004] For pyrite-phase transition metal chalcogenides ME 2 (M=Fe, Co, Ni; X=S, Se), most of the current reports are about CoSe 2 ,CoS 2 The synthesis and preparation of NiSe and its catalytic properties research, about NiSe 2 There are few reports on the preparation of , and its morphology is mostly film, nanoparticle or nanowire

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  • NiSe2 transition metal chalcogenide nanosheet as well as preparation method and application thereof
  • NiSe2 transition metal chalcogenide nanosheet as well as preparation method and application thereof
  • NiSe2 transition metal chalcogenide nanosheet as well as preparation method and application thereof

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[0030] The present invention also provides the above-mentioned NiSe 2 A preparation method for transition metal chalcogenide nanosheets, comprising the following steps:

[0031] A) reacting the aqueous solution of the nickel source compound with ammonia water to obtain a reaction solution;

[0032] B) Insulating the substrate in the reaction solution obtained in step A) to obtain Ni(OH) grown on the surface 2 the substrate of the nanosheet;

[0033] C) Calcining the Se powder and the substrate obtained in step B) under the airflow of an inert atmosphere to obtain NiSe 2 Transition metal chalcogenide nanosheets.

[0034] The present invention uses nickel source compound and ammonia water as raw materials to prepare NiSe 2 Transition metal chalcogenide nanosheets.

[0035] The nickel source compound is preferably Ni(NO 3 ) 2 ·6H 2 O or NiCl 2 ·6H 2 O.

[0036] The nickel source compound is dissolved in water to obtain an aqueous solution, which is then reacted with am...

Embodiment 1

[0063] (1) Using nickel nitrate hexahydrate Ni(NO 3 ) 2 ·6H 2 O solid particle and ammonia solution are as the raw material of reaction, take the Ni (NO of 2.9079g) with analytical balance 3 ) 2 ·6H 2 O solid was dissolved in 10 mL of deionized water, and then 40 mL of ammonia water with a mass fraction of 25-28% was added dropwise, and magnetically stirred for half an hour to make it fully react.

[0064] (2) Use acetone, absolute ethanol, and deionized water to ultrasonically clean the pure Si substrate produced by Suzhou Ruicai Semiconductor Co., Ltd. for 10 minutes, and then place the substrate in the center of a 100mL reactor with the polished side facing On; pour the above-mentioned stirred solution, cover it with a glass cover, put it into an electric oven and keep it warm at 90°C for 12 hours, and petal-shaped nanosheets grow on the surface of the substrate.

[0065] (3) After the reaction kettle was lowered to room temperature, the silicon chip was taken out, was...

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Abstract

The invention provides a NiSe2 transition metal chalcogenide nanosheet. The nanosheet is 1-2 mu m long and 30-80 mu m thick. The transition metal chalcogenide nanosheet has a larger specific surface area, is used as a water decomposition electrocatalyst and has the higher catalytic efficiency. The invention further provides a preparation method of the NiSe2 transition metal chalcogenide nanosheet. A nickel source compound and ammonia water are used as raw materials, a NI(OH)2 nanosheet grows on a substrate in a thermal insulation manner, then Se displacement is performed, and the NiSe2 transition metal chalcogenide nanosheet is obtained. The method adopts the simple process, and NiSe2 transition metal chalcogenide with the sheet-like morphology is prepared successfully.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a NiSe 2 Transition metal chalcogenide nanosheet, its preparation method and use. Background technique [0002] In order to solve energy problems, hydrogen has been considered as a sustainable, safe and clean alternative energy. Hydrogen production by electrolysis of water has the advantages of simple operation, low cost and no pollution, and is considered to be one of the most promising hydrogen production technologies. Efficient hydrogen evolution electrode materials should have the characteristics of good electrical conductivity, large specific surface area, low hydrogen evolution overpotential, high electrocatalytic activity, good electrochemical stability, and strong corrosion resistance. Platinum group metals are currently the most efficient electrocatalysts for water splitting. However, precious metals are very scarce resources on the earth and cannot meet the prac...

Claims

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Application Information

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IPC IPC(8): C01B19/04B82Y40/00B01J27/057C25B11/06C25B1/04
CPCB01J27/0573C01B19/007C01P2002/72C01P2002/82C01P2004/03C01P2004/22C25B1/04C25B11/04Y02E60/36
Inventor 向斌刘萍
Owner UNIV OF SCI & TECH OF CHINA
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