Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of Pt-Ni alloy nano particle and colloidal dispersion system thereof

A technology of alloy nanoparticles and colloid dispersion, 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: 2010-09-01
TIANJIN UNIV OF COMMERCE
View PDF0 Cites 18 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of Pt-Ni alloy nano particle and colloidal dispersion system thereof
  • Preparation method of Pt-Ni alloy nano particle and colloidal dispersion system thereof
  • Preparation method of Pt-Ni alloy nano particle 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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a Pt-Ni alloy nano particle and a colloidal dispersion system thereof, which aims at providing a preparation method of a Pt-Ni alloy nano particle and a colloidal dispersion system thereof which have the advantages of uniform nano particle size, simple preparation process, high activity, low energy consumption and no involvement with extremely toxic substances. The preparation method comprises the following steps: under the conditions of magnetic stirring and inert gas shielding, injecting a system B to a system A while the temperature is raised to 100-250 DEG C, wherein the system A comprises a high-boiling point organic reagent, alloy precursors and a protective agent, and the system B comprises a high-boiling point organic reagent and a reducing agent; continuing heating to a temperature below the boiling point of the high-boiling point organic reagent, maintaining the constant temperature for 15-30 minutes, and then cooling to room temperature; adding ethanol, centrifugating to obtain a precipitate, and repeatedly washing the precipitate to obtain PtxNiy alloy nano particle powder; and re-dispersing the alloy powder in the organic solvent to obtain the PtxNiy nano alloy colloidal dispersion system, wherein the alloy precursors are Pt(acac)2 and Ni(acac)2, and the reducing agent is 1,2-dihydroxyl cetane.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F9/02
Inventor 梁新义
Owner TIANJIN UNIV OF COMMERCE