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Preparing method of cube platinum ruthenium core-shell nanocrystalline and product of preparing method

A technology of cubes and nanocrystals, applied in the field of nanomaterials, can solve the problems of complex preparation methods, uneven size and morphology of products, etc., and achieve the effects of simple reagents, low cost and good dispersibility.

Active Publication Date: 2016-04-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method in the prior art is complicated, and the size and shape of the obtained product are not uniform

Method used

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  • Preparing method of cube platinum ruthenium core-shell nanocrystalline and product of preparing method
  • Preparing method of cube platinum ruthenium core-shell nanocrystalline and product of preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 9.84mg chloroplatinic acid (H 2 PtCl 6 ), 14.34mg ruthenium acetylacetonate (Ru(acac) 3 ), 110mg tri-n-octylphosphine oxide (TOPO), add 4mL N, N-dimethylformamide (DMF) and 4mL oleylamine (OAm) simultaneously; / L, 0.0045mol / L and 0.0356mol / L;

[0025] (2) Stir the mixed solution prepared in (1) for more than 30 minutes to fully dissolve;

[0026] (3) Place the mixed solution obtained in (2) in a heater, heat to 220°C while stirring, and react for 180 minutes;

[0027] (4) Centrifuge the product obtained in (3) at a speed of 3,000 to 5,000 rpm for 5 minutes, discard the supernatant, remove excess OAm and TOPO, and centrifuge for 3 to 5 times;

[0028] (5) ultrasonically disperse the precipitate obtained in (4) in cyclohexane, and store at room temperature.

[0029] figure 1 It is a transmission electron microscope (TEM) image at 180,000 magnifications; figure 2 Part A is a transmission electron microscope image at 100,000 magnification; part B is a scan...

Embodiment 2

[0031] (1) Weigh 4.92mg chloroplatinic acid (H2PtCl6), 19.12mg ruthenium acetylacetonate (Ru(acac) 3 ), 110mg tri-n-octylphosphine oxide (TOPO), add 4mL N, N-dimethylformamide (DMF) and 4mL oleylamine (OAm) simultaneously; / L, 0.006mol / L and 0.0356mol / L;

[0032] (2) Stir the mixed solution prepared in (1) for more than 30 minutes to fully dissolve;

[0033] (3) Place the mixed solution obtained in (2) in a heater, heat to 220°C while stirring, and react for 180 minutes;

[0034] (4) Centrifuge the product obtained in (3) at a speed of 3,000 to 5,000 rpm for 5 minutes, discard the supernatant, remove excess OAm and TOPO, and centrifuge for 3 to 5 times;

[0035] (5) ultrasonically disperse the precipitate obtained in (4) in cyclohexane, and store at room temperature. The result obtained is similar to Example 1.

Embodiment 3

[0037] (1) Weigh 14.76mg of chloroplatinic acid (H 2 PtCl 6 ), 9.56mg ruthenium acetylacetonate (Ru(acac) 3), 110mg tri-n-octylphosphine oxide (TOPO), add 4mL N, N-dimethylformamide (DMF) and 4mL oleylamine (OAm) simultaneously; / L, 0.003mol / L and 0.0356mol / L;

[0038] (2) Stir the mixed solution prepared in (1) for more than 30 minutes to fully dissolve;

[0039] (3) Place the mixed solution obtained in (2) in a heater, heat to 220°C while stirring, and react for 180 minutes;

[0040] (4) Centrifuge the product obtained in (3) at a speed of 3,000 to 5,000 rpm for 5 minutes, discard the supernatant, remove excess OAm and TOPO, and centrifuge for 3 to 5 times;

[0041] (5) ultrasonically disperse the precipitate obtained in (4) in cyclohexane, and store at room temperature. The result obtained is similar to Example 1.

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Abstract

The invention relates to a preparing method of cube platinum ruthenium core-shell nanocrystalline. The preparing method comprises the following steps that firstly, ruthenium(III)2,4-pentanedionate, a platinum-containing compound and trioctylphosphine oxide are dissolved in a mixed solution of oleylamine and N,N-dimethylformamide, wherein the platinum-containing compound is chloroplatinic acid or sodium chloroplatinate; secondly, the mixed solution obtained in the first step is stirred to be subjected to the reaction for 30-600 min at the temperature of 180-250 DEG C; and thirdly, a product obtained in the second step is separated, and then sediment, namely the cube platinum ruthenium core-shell nanocrystalline is obtained. The invention further relates to the cube platinum ruthenium core-shell nanocrystalline prepared through the method. According to the preparing method, the cube platinum ruthenium core-shell nanocrystalline uniform in appearance and size is obtained through a one-step method, the obtained product is moderate in size and good in dispersibility, and the preparing method is simple.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a method for preparing cubic platinum ruthenium core-shell nanocrystals and a product thereof. Background technique [0002] Platinum-based noble metal nanocrystals have always been dominant as catalysts, and their excellent performance in other aspects (such as electricity, sensing, etc.) has attracted many scholars to conduct in-depth research on the synthesis, preparation and application of platinum-based nanocrystals. However, another characteristic of platinum-based metals that cannot be ignored is that they are expensive and have limited resource reserves. This feature largely limits its wide application. In response to this, the current research is mainly to introduce other metals to form a composite nanostructure, which can not only reduce the amount of platinum and cost, but also bring better performance to the composite structure. [0003] The existing research results on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/02
CPCB22F9/24B22F1/17
Inventor 张辉林卓清颜聿聪杨德仁
Owner ZHEJIANG UNIV
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