Preparation method of Ir nanowire with nano holes and obtained material and application thereof

A nano-hole and nano-wire technology, applied in the field of Ir nano-wire materials, can solve the problems of cumbersome and complicated steps, long time-consuming, etc., and achieve the effects of simple and fast operation, easy operation and high catalytic activity.

Active Publication Date: 2019-04-09
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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  • Preparation method of Ir nanowire with nano holes and obtained material and application thereof
  • Preparation method of Ir nanowire with nano holes and obtained material and application thereof
  • Preparation method of Ir nanowire with nano holes and obtained material and application thereof

Examples

Experimental program
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Effect test

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 preparation method of an Ir nanowire with nano holes and an obtained material and application thereof. Deionized water is taken as a solvent, Ir salt is taken as a precursor,and PAH (polyacrylamide hydrochloride) is taken as a morphology guiding agent and a surface activating agent, the pH value of a mixed solution is adjusted to 6-14, a reducing agent is added, one-stepreduction is carried out by adopting a hydrothermal reaction method after uniformly mixing is carried out, and the product is centrifuged, washed and dried to obtain the Ir nanowire with the nano holes. Compared with a traditional preparation method, the operation of method is simple and rapid, the prepared and obtained Ir nanowire with the nano holes are uniform in morphology and cross-linked toform a plurality of branches, and large-scale production can be realized; the Ir nanowire with the nano holes prepared and obtained by the method has the advantages of being hollow, porous, large inspecific surface area, multiple in active sites, rich in surface defects, and has excellent electrocatalytic activity for the oxygen evolution reaction under an alkaline condition, and the Ir nanowirecan be applied to the catalyst of an 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 Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00C25B1/04C25B11/06
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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