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Iridium-based nanowire synthesis method

A synthesis method and nanowire technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of copper iridium nanowires with small diameter, difficult to promote, and poor universality , to achieve good universality, increase catalytic specific surface area, and high catalytic activity

Active Publication Date: 2021-03-12
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the diameter of copper-iridium nanowires prepared by this method is small, ranging from 2-5nm; on the other hand, the universality is not good, and it is difficult to extend to other metals

Method used

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  • Iridium-based nanowire synthesis method
  • Iridium-based nanowire synthesis method
  • Iridium-based nanowire synthesis method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Measure 6ml of dimethylformamide solution, 10mg of iridium trichloride, 10mg of copper trichloride dihydrate, and 40mg of polyvinylpyrrolidone (K30) into the same reactor, then weigh 2g of sodium iodide, super 2ml of pure water was mixed, and the two solutions were mixed and ultrasonicated for 30mins.

[0041] (2) Heat up the reaction system at 5°C / min for 30mins to 200°C, keep the temperature constant, and react for 5h to obtain a black solution. After the whole system is cooled, the product is centrifuged at 11000r / min for 20mins and washed with 8ml of ethanol 3 times, and finally dispersed in 1ml ethanol for later use to obtain iridium-copper alloy nanowires.

Embodiment 2

[0043] (1) Measure 6ml of dimethylformamide solution, 10mg of iridium trichloride, 10mg of silver acetate, and 40mg of polyvinylpyrrolidone (K30) into the same reactor, then weigh 2g of sodium iodide and 2ml of ultrapure water to mix , and then the two solutions were mixed and ultrasonicated for 30mins.

[0044] (2) Heat up the reaction system at 5°C / min for 30mins to 200°C, keep the temperature constant, and react for 5h to obtain a black solution. After the whole system is cooled, the product is centrifuged at 11000r / min for 20mins and washed with 8ml of ethanol 3 times, and finally dispersed in 1ml ethanol for later use to obtain iridium-silver alloy nanowires.

Embodiment 3

[0046] (1) Measure 6ml of dimethylformamide solution, 10mg of iridium trichloride, 10mg of palladium chloride, and 40mg of polyvinylpyrrolidone (K30) into the same reactor, then weigh 2g of sodium iodide and 2ml of ultrapure water After mixing, the two solutions were mixed and ultrasonicated for 30mins.

[0047](2) Heat up the reaction system at 5°C / min for 30mins to 200°C, keep the temperature constant, and react for 5h to obtain a black solution. After the whole system is cooled, the product is centrifuged at 11000r / min for 20mins and washed with 8ml of ethanol 3 times, and finally dispersed in 1ml ethanol for later use to obtain iridium-palladium alloy nanowires.

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Abstract

The invention discloses an iridium-based nanowire synthesis method. The method comprises the following steps: (1) selecting a dimethylformamide solution, iridium trichloride, a metal source, polyvinylpyrrolidone and sodium iodide as raw materials, placing the dimethylformamide solution, the iridium trichloride, the metal source and the polyvinylpyrrolidone into a same reactor, and uniformly mixingto obtain a solution 1; (2) adding the sodium iodide into ultrapure water to obtain a solution II; (3) mixing the solution I and the solution II, and carrying out uniform ultrasonic dispersion to obtain a mixed reaction solution; (4) heating the mixed reaction solution to T1 in a gradient manner, keeping the temperature unchanged, and reacting for a period of time t2 to obtain a black solution; and stopping the reaction, and after the whole system is cooled, centrifuging and washing the product to obtain an iridium-based nanowire. The iridium-based nanowire synthesized through the method is good in performance, high efficiency and high stability of oxygen evolution under the acidic condition can be achieved, the catalytic energy barrier of oxygen evolution semi-reaction is reduced, and the iridium-based nanowire has high potential practical value.

Description

technical field [0001] The invention relates to a method for synthesizing iridium-based nanowires, belonging to the field of nanomaterial synthesis. Background technique [0002] Oil resources are close to exhaustion, and people urgently need a clean energy that can replace it. Hydrogen energy is obviously an optimal choice, because it is a clean and abundant resource, and people often hope to produce hydrogen through electrocatalytic water splitting. Generally, water splitting consists of two half-reactions of hydrogen evolution and oxygen evolution. Under acidic conditions, the catalytic energy barrier of hydrogen evolution reaction is lower, while that of oxygen evolution reaction is just the opposite. Therefore, it is of practical significance to solve the rate of oxygen evolution reaction under acidic conditions. . [0003] The preparation of one-dimensional nanomaterials can effectively increase the catalytic specific surface area, thereby providing more active sites...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00C25B11/081C25B1/04
CPCB22F9/24B82Y40/00B82Y30/00C25B1/04B22F1/0547Y02E60/36
Inventor 邓宇甲周路明王宽宽濮厚康张特董开宇代会珍
Owner QINGDAO UNIV
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