Fe-doped Ni3Se4 nanorod/nanosheet grading array structure material, preparation method and application of material

An array structure, nanosheet technology, applied in catalyst activation/preparation, chemical instruments and methods, nanotechnology, etc., to achieve the effects of enhanced electrical conductivity, fast interfacial charge transfer, and promotion of chemical adsorption

Active Publication Date: 2019-09-27
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But regarding chemically doped Ni 3 Se 4 Few reports have been reported for the application of electrocatalytic total water splitting

Method used

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  • Fe-doped Ni3Se4 nanorod/nanosheet grading array structure material, preparation method and application of material
  • Fe-doped Ni3Se4 nanorod/nanosheet grading array structure material, preparation method and application of material
  • Fe-doped Ni3Se4 nanorod/nanosheet grading array structure material, preparation method and application of material

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Experimental program
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Effect test

Embodiment 1

[0046] A Fe-doped Ni 3 Se 4 A method for preparing a nanorod / nanosheet hierarchical array structure material, comprising the following steps:

[0047] (1) Soak a piece of nickel foam (NF) with an area of ​​2×3cm in 6M hydrochloric acid for 15min, and then wash it three times with deionized water and absolute ethanol. Measure 15mL of ammonia water and add it to 25mL of deionized water. After stirring evenly, accurately weigh 1mmol of Se powder and 2.5mmol of NaBH 4 Add the above mixed solution, ultrasonically stir for 30min, then transfer the reddish-brown solution to a 50mL polytetrafluoroethylene-lined stainless steel reaction kettle, put the pre-treated foamed nickel into the solution obliquely, and react in an oven at 120°C 8h. After the reaction is finished, cool down to room temperature naturally, and the foamed nickel A covered by the black sample 1 Wash with deionized water and absolute ethanol three times each, and dry the obtained precursor samples in a vacuum ove...

Embodiment 2

[0062] A Fe-doped Ni 3 Se 4 Application of Nanorod / Nanosheet Hierarchical Array Structure Materials as Oxygen Evolution Reaction (OER) Catalysts.

[0063] The specific application method is: use Fe-doped Ni with an area of ​​0.5×0.5cm 3 Se 4 The nanorod / nanosheet hierarchical array structure material is used as the working electrode, and platinum wire and Ag / AgCl electrode are used as the counter electrode and reference electrode, respectively. Electrochemical tests were performed at room temperature (25 °C) using a CHI760E electrochemical workstation in 1.0 M KOH electrolyte solution. Commercial RuO 2 The loaded electrode was used as a benchmark to compare the OER performance. Using linear sweep voltammetry (LSV) at 2.0mV s -1 Polarization curves were obtained at a scan rate of 90% and an ohmic compensation of 90%. Such as Figure 11 As shown, Fe-doped Ni 3 Se 4 The nanorod / nanosheet hierarchical array structure has remarkable OER activity, and only needs a low over...

Embodiment 3

[0065] A Fe-doped Ni 3 Se 4 Applications of Nanorod / Nanosheet Hierarchical Array Structure Materials as Hydrogen Evolution Reaction (HER) Catalysts.

[0066] The specific application method is: use Fe-doped Ni with an area of ​​0.5×0.5cm 3 Se 4 The nanorod / nanosheet hierarchical array structure material is used as the working electrode, and the carbon rod and Ag / AgCl electrode are used as the counter electrode and the reference electrode, respectively. Electrochemical tests were performed at room temperature (25 °C) using a CHI760E electrochemical workstation in 1.0 M KOH electrolyte solution. Using linear sweep voltammetry (LSV) at 2.0mV s -1 The scan rate is obtained at 90% ohmic compensation. Such as Figure 15 As shown, Fe-doped Ni 3 Se 4 The nanorod / nanosheet hierarchical array structure exhibits excellent HER activity, requiring only a low potential of 153 mV to reach 10 mA cm -2 The current density is better than that of NiSe nanorods at 182mV. Although commer...

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Abstract

The invention discloses a Fe-doped Ni3Se4 nanorod / nanosheet grading array structure material, a preparation method and application of the material. The preparation method comprises the following steps that Se powder and a reducing agent are dissolved into a mixed solution of ammonia water and deionized water, foam nickel is obliquely put into the mixed solution, and foam nickel with a precursor is obtained through a hydrothermal reaction; iron salt is dissolved into a mixed solution of ethanol and NaClO, and the foam nickel with the precursor is put in, and a product is obtained through a solvothermal reaction. Compared with the prior art, by means of a low-temperature liquid phase synthesis method, Fe<3+> ions are doped into a lattice of a Ni3Se4 grading nano-structure, the method is simple, and the cost is low; the material serving as an electrocatalyst of an oxygen evolution reaction (OER), a hydrogen evolution reaction (HER) and a whole water decomposition reaction has the advantages of being large in active area, good in electrical conductivity and the like; the Fe-doped Ni3Se4 nanorod / nanosheet grading array structure material can achieve high-efficiency whole water decomposition at high electric current density, and the excellent stability is shown at the low electric current density and the high electric current density.

Description

technical field [0001] The invention belongs to the field of preparation methods of nanometer materials and cross application of electrocatalysis, and specifically relates to an Fe-doped nickel tetraselenide nanorod / nanosheet hierarchical array structure material, a preparation method and an application thereof. Background technique [0002] Electrocatalytic water splitting to generate clean and renewable fuels involves anodic oxygen evolution reaction (OER) and cathodic hydrogen evolution reaction (HER). Advances in this technology require active, stable, and inexpensive electrocatalysts to reduce the overpotential and accelerate the kinetics of OER and HER. 3d transition metal compounds are considered to be ideal electrocatalysts for water splitting due to their excellent catalytic performance through precise control of their composition and structure. Among them, nickel-based compounds, such as nickel selenide, have unique electronic structures, are cheap and readily ava...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J37/16B82Y30/00B82Y40/00C25B1/04C25B11/06
CPCB01J27/0573B01J35/0033B01J37/16B82Y30/00B82Y40/00C25B1/04C25B11/091Y02E60/36
Inventor 吴正翠黄建松
Owner ANHUI NORMAL UNIV
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