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A kind of preparation method of pt-ni alloy nanoparticles and colloidal dispersion system thereof

An alloy nano-particle, pt-ni technology, applied in the nano field, can solve problems such as no practical application value, and achieve the effects of uniform size, simple preparation process and high activity

Inactive Publication Date: 2011-12-28
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Fe(CO) 5 Is a highly toxic metal carbonyl complex, so the method has no practical value

Method used

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  • A kind of preparation method of pt-ni alloy nanoparticles and colloidal dispersion system thereof
  • A kind of preparation method of pt-ni alloy nanoparticles and colloidal dispersion system thereof
  • A kind of preparation method of pt-ni alloy nanoparticles and colloidal dispersion system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 15ml of dioctyl ether, 0.93mmol of oleic acid, 0.63mmol of oleylamine, and 0.3mmol of Pt(acac) successively into a 50ml three-necked bottle 2 , 0.3mmol of Ni(acac) 2 System A is obtained. After repeated vacuuming and nitrogen filling, under the protection of magnetic stirring and nitrogen atmosphere, when the above system A was heated up to 100°C, 6ml of 1,2-dihydroxyhexadecane dioctyl ether solution with a concentration of 120mmol / L was added. The solution in the flask immediately turned dark brown. Continue to raise the temperature to 280°C and keep the temperature constant for 20 minutes, then cool down to room temperature. Transfer the reaction system to a 500ml beaker, add 160ml of ethanol, stir well and carry out centrifugal sedimentation, discard the supernatant, and wash the precipitate with ethanol repeatedly to obtain a PtNi alloy with a particle size of 8±2nm and a face-centered cubic structure Nanoparticle powder. Add 15 ml of n-hexane to the above-m...

Embodiment 2

[0033] Add 15ml of dioctyl ether, 0.93mmol of oleic acid, 0.63mmol of oleylamine, and 0.3mmol of Pt(acac) successively into a 50ml three-necked bottle 2 , 0.1 mmol of Ni(acac) 2To obtain system A, after repeated vacuuming and nitrogen filling, under the protection of magnetic stirring and nitrogen atmosphere, when the above system A was heated up to 250°C, 6ml of 1,2-dihydroxyhexadecane dioctyl with a concentration of 120mmol / L was added. Ether solution, the solution in the three-necked flask immediately turned dark brown. Continue to raise the temperature to 280°C and keep the temperature constant for 20 minutes, then cool down to room temperature. Transfer the reaction system to a 500ml beaker, add 160ml of ethanol, stir well and carry out centrifugal sedimentation, discard the supernatant, and wash the precipitate repeatedly with ethanol to obtain Pt with a particle size of 6±12nm and a face-centered cubic structure. 3 Ni nanoparticles. To the above Pt 3 Add 15ml chloro...

Embodiment 3

[0035] Add 15ml of dioctyl ether, 0.93mmol of oleic acid, 0.75mmol of oleylamine, and 0.3mmol of Pt(acac) into a 50ml three-necked flask successively 2 , 0.15mmol of Ni(acac) 2 To obtain system A, after repeated vacuuming and nitrogen filling, under the protection of magnetic stirring and nitrogen atmosphere, when the above system A was heated to 150°C, 6ml of 1,2-dihydroxyhexadecane dioctyl with a concentration of 120mmol / L was added. Ether solution, the solution in the three-necked flask immediately turned dark brown, continued to heat up to 280°C and kept the temperature for 20min, then cooled down to room temperature. Transfer the reaction system to a 500ml beaker, add 160ml of ethanol, stir well and carry out centrifugal sedimentation, discard the supernatant, and wash the precipitate repeatedly with ethanol to obtain Pt with a particle size of 8±2nm and a face-centered cubic structure. 2 Ni nanoparticles. To the above Pt 2 Add 15ml hexanaphthene in Ni alloy nano parti...

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Abstract

The invention discloses a method for preparing Pt-Ni alloy nanoparticles and a colloidal dispersion system thereof, and aims to provide a nanoparticle with uniform size, simple preparation process, high activity, low energy consumption, and no highly toxic substances involved in the synthesis. A method for preparing Pt-Ni alloy nanoparticles and a colloidal dispersion system. Under the protection of magnetic stirring and inert gas, inject system B into system A when the temperature is raised to 100-250°C. System A is composed of high-boiling point organic reagents, alloy precursors and protective agents, and system B is composed of high-boiling point organic reagents and reducing agents. composition. Continue to raise the temperature to below the boiling point of the high-boiling point organic reagent, keep the temperature for 15-30 minutes, and then cool down to room temperature; add ethanol, and centrifuge the precipitate to obtain the PtxNiy alloy nano particle powder after repeated washing. The alloy powder is redispersed in an organic solvent to obtain a PtxNiy nano-alloy colloidal dispersion system. The alloy precursors are Pt(acac)2 and Ni(acac)2, and the reducing agent is 1,2-dihydroxyhexadecane.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and more specifically relates to a preparation method of Pt-Ni alloy nanoparticles and a colloid dispersion system thereof. Background technique [0002] Noble metal-transition element alloy nanoparticles have shown excellent performance and wide applications in low-temperature fuel cells, nano-biosensors, magnetic memory materials and other fields. [0003] Because the oxidation-reduction potentials of Pt and transition elements are quite different, its ions are difficult to be reduced simultaneously. The current preparation method for preparing PtM (M is a transition element) alloy nanoparticles generally needs to be calcined at a high temperature above 500°C. For example: metal inorganic salts such as Venkataraman (J. Electrochem. Soc., 2003, 150: A278-284) are used as precursors, reduced with C2N2 in aqueous solution, and the product is calcined at 600 °C for 1 hour to obtain Pt-Ag- Ru, Pt-Au-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F9/02
Inventor 梁新义
Owner TIANJIN UNIV OF COMMERCE