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A kind of synthetic method of rhodium-platinum core-shell bimetallic nanowire

A technology of bimetallic nano and synthetic methods, which is applied in the field of bimetallic nanowire synthesis, can solve problems such as unfavorable industrial applications and complex synthesis methods, and achieve the effects of controllable synthetic element components, high specific surface area, and high durability

Active Publication Date: 2021-08-03
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the synthesis method in the prior art is still comparatively complicated, is unfavorable for its industrial application

Method used

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  • A kind of synthetic method of rhodium-platinum core-shell bimetallic nanowire
  • A kind of synthetic method of rhodium-platinum core-shell bimetallic nanowire
  • A kind of synthetic method of rhodium-platinum core-shell bimetallic nanowire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]In a 25mL glass bottle, add 15.61mg sodium hexachlororhodium dodecahydrate, 93mg sodium iodide dihydrate, 40mg sodium ascorbate, 160mg polyvinylpyrrolidone-55000, 5mL ethylene glycol, 1mL ultrapure water, and sonicate for 5min Then stir at room temperature for 10 minutes, put the reaction bottle in an oil bath at 170°C, react for two hours, and finally cool down to room temperature naturally, wash with ethanol-acetone several times, and finally collect in ethylene glycol to obtain a concentration of 0.27mg / mL of rhodium nanowires are ready for use, characterized as figure 1 As shown, the diameter of the nanowire crystal is 1.90 nm.

Embodiment 2

[0029] In a 25mL glass bottle, add 2mL of rhodium nanowires obtained in Example 1, 0.54mg of chloroplatinic acid hexahydrate, 200mg of polyvinylpyrrolidone-55000, 8mL of ethylene glycol, ultrasonicate for about 6min, and then stir at room temperature for 10min. Put it in an oil bath at 120°C, react for four hours, and finally cool down to room temperature naturally, and wash with ethanol-acetone several times to get Rh@Pt 0.23 Nanowires with a core-shell structure, characterized by figure 2 As shown, the crystal diameter of the nanowire is 2.35 nm due to the Pt shell on the outer layer.

Embodiment 3

[0031] In a 25mL glass bottle, add 2mL of rhodium nanowires obtained in Example 1, 1.35mg of chloroplatinic acid hexahydrate, 200mg of polyvinylpyrrolidone-55000, 8mL of ethylene glycol, ultrasonicate for about 6min, and then stir at room temperature for 10min. Put it in an oil bath at 120°C, react for four hours, and finally cool down to room temperature naturally, and wash with ethanol-acetone several times to obtain Rh 1 @Pt 0.46 Nanowires with a core-shell structure, characterized by image 3 As shown, the diameter is about 2.8nm, and the Pt layer of the nanowire shell becomes thicker.

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Abstract

The invention discloses a method for synthesizing rhodium-platinum core-shell bimetallic nanowires. Ethylene glycol is used as a reaction solvent, sodium iodide dihydrate is used as a complexing agent, polyvinylpyrrolidone is used as a surfactant, and sodium ascorbate is used as a weak reducing agent. , Sodium hexachlororhodiumate dodecahydrate is the source of rhodium, and chloroplatinic acid hexahydrate is the source of platinum. In the present invention, rhodium-platinum with controllable components, high specific surface area, high durability, high resistance to CO poisoning, and rich defect sites is prepared by first preparing rhodium nanowire seed crystals, and then depositing them with a simple and green chemical method. Core-shell bimetallic nanowire materials.

Description

technical field [0001] The invention belongs to the technical field of synthesis of bimetallic nanowires, and in particular relates to a method for synthesizing rhodium-platinum core-shell bimetallic nanowires. Background technique [0002] At present, with the shortage of global fossil energy and the deteriorating human living environment, people are urged to study the synthesis method of high-efficiency green energy and high-efficiency catalysts that can replace traditional fossil energy, and prepare high-stable energy conversion based on surface and interface effects. And green energy storage materials have become one of the most active research fields of nanomaterials. Due to their unique properties, noble metal nanomaterials have been widely used in catalysis, optics, energy storage and conversion, biomedicine and other fields. The catalytic activity and selectivity of noble metal nanocrystals are closely related to their size, morphology and surface structure. So far...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/02B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0547B22F1/17
Inventor 谢水奋刘凯王伟李娉婷
Owner HUAQIAO UNIVERSITY
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