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A kind of preparation method with nanohole IR nanowire and its obtained material and application

A technology of nanoholes and nanowires, applied in the field of Ir nanowire materials, can solve the problems of complicated and time-consuming steps, and achieve the effect of simple and fast operation, convenient operation and uniform shape

Active Publication Date: 2022-03-08
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, porous structures are mainly synthesized by chemical etching, dealloying, template method, seed crystal growth method and galvanic replacement method. These routes are cumbersome and time-consuming.

Method used

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  • A kind of preparation method with nanohole IR nanowire and its obtained material and application
  • A kind of preparation method with nanohole IR nanowire and its obtained material and application
  • A kind of preparation method with nanohole IR nanowire and its obtained material and application

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Embodiment 1

[0024] A method for ultrafast and macro-scale preparation of Ir nanowires with nanoholes, comprising the following steps:

[0025] 1) Preparation of reaction solution: Measure 10mL of aqueous solution as a solvent in a 25ml reactor liner, add 1mL of 0.5mol L -1 PAH solution was used as a shape-directing agent, adding 1mL 0.05mol L -1 IrCl 3 The solution was used as a precursor, and after stirring for 30 minutes, NaOH solution was added to adjust the pH of the solution to 10. After ultrasonication for 30 minutes, 1 mL of 40% formaldehyde solution was added.

[0026] 2) Preparation of Ir nanowires with nanoholes: place the prepared reaction solution in an oven at 200°C for 8 hours, and centrifuge and wash the brown-black product three times with a solution of deionized water:ethanol=3:1 after the reaction , Ir nanowires with nanoholes can be obtained by vacuum drying at room temperature for 6 h.

Embodiment 2

[0028] A method for ultrafast and macro-scale preparation of Ir nanowires with nanoholes, comprising the following steps:

[0029] 1) Preparation of reaction solution: Measure 10mL of aqueous solution as a solvent in a 25ml reactor liner, add 1.5mL of 0.5mol L -1 PAH solution of 0.05mol L -1 IrCl 3 The solution was used as a precursor, and after stirring for 30 minutes, NaOH solution was added to adjust the pH of the solution to 10. After ultrasonication for 30 minutes, 1 mL of 40% formaldehyde solution was added.

[0030] 2) Preparation of Ir nanowires with nanoholes: place the prepared reaction solution in an oven at 200°C for 8 hours, and centrifuge and wash the brown-black product three times with a solution of deionized water:ethanol=3:1 after the reaction , Ir nanowires with nanoholes can be obtained by vacuum drying at room temperature for 6 h.

Embodiment 3

[0032] A method for ultrafast and macro-scale preparation of Ir nanowires with nanoholes, comprising the following steps:

[0033] 1) Preparation of reaction solution: Measure 10mL of aqueous solution as a solvent in a 25ml reactor liner, add 0.1mL of 0.5mol L -1 PAH solution was used as a shape-directing agent, adding 1.5mL 0.05mol L -1 IrCl 3 The solution was used as a precursor, after stirring for 30 minutes, NaOH solution was added to adjust the pH of the solution to 9, and after 30 minutes of ultrasonication, 1 mL of 40% formaldehyde solution was added.

[0034] 2) Preparation of Ir nanowires with nanoholes: place the prepared reaction solution in an oven at 200°C for 8 hours, and centrifuge and wash the brown-black product three times with a solution of deionized water:ethanol=3:1 after the reaction , Ir nanowires with nanoholes can be obtained by vacuum drying at room temperature for 6 h.

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Abstract

The invention discloses a method for preparing Ir nanowires with nanoholes and the resulting materials and applications. Deionized water is used as a solvent, Ir salt is used as a precursor, and PAH (polypropylene amine hydrochloride) is used as a morphology Directing agent and surfactant, adjust the pH value of the mixed solution to 6-14, add a reducing agent, mix evenly and use a hydrothermal reaction method for one-step reduction, centrifuge, wash and dry the product to obtain Ir nanowires with nanopores . Compared with the traditional preparation method, the method is simple and quick to operate, and the prepared Ir nanowires with nanoholes have a uniform shape and are cross-linked into multi-branches, which can realize large-scale production. The Ir nanowires with nanoholes prepared by the method of the present invention have the advantages of being hollow and porous, large specific surface area, many active sites, and abundant surface defects, and have excellent electrocatalytic activity for the oxygen evolution reaction under alkaline conditions, and can be Catalyst for alkaline oxygen evolution reaction.

Description

technical field [0001] The invention relates to a preparation method of Ir nanowires with nanoholes, the obtained materials and applications thereof, and belongs to the technical field of Ir nanowire materials. Background technique [0002] The oxygen evolution reaction plays an important role in a series of energy conversion and energy storage processes such as electrolysis of water and rechargeable metal-air batteries, but it involves the transfer of four electrons, the kinetic process is slow, and a high overpotential is required. Therefore, many scientific researchers are devoted to the research of excellent oxygen evolution reaction catalysts. IrO 2 and RuO 2 It exhibits good alkaline oxygen evolution reaction performance. However, the low reserves and high price of precious metals in the earth's crust hinder their large-scale application. In recent years, how to reduce the amount of noble metals and expose more active sites to improve catalytic activity and stabili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00C25B1/04C25B11/081
CPCC25B1/04B82Y30/00B82Y40/00B22F9/24C25B11/081B22F1/0547Y02E60/36
Inventor 唐亚文李家辉刘祯圆邓思辉孙冬梅徐林
Owner NANJING NORMAL UNIVERSITY
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