Method for preparing one-dimensional alloy nanometer wire

A technology of alloy nano and mixed solution, which is applied in the field of preparation of one-dimensional Pt-M alloy nanowires, can solve the problems of limited catalytic performance, low specific surface area, and limited output, and achieve high application value, large specific surface area, and easy operation Effect

Inactive Publication Date: 2009-09-16
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0003] But so far, the reports on the preparation and synthesis of one-dimensional Pt-M alloy nanoparticles are limited to the template method, but the output of the template method is limited, and the operation process is complicated, the preparation cost is high, and the diameter of the obtained nanowires is generally greater than 20nm. low, thus greatly limiting its catalytic performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: First, the chloroform solution of the cetyltrimethylammonium bromide that concentration is 10mg / mL and the K that concentration is 8mg / mL 2 PtCl 4 Solution according to cetyltrimethylammonium bromide and K 2 PtCl 4 The mass ratio of Pt ions in the solution was 0.5:1 and mixed uniformly to obtain mixed solution A; then, RuCl with a concentration of 2 mg / mL was added to the obtained mixed solution A 3 The solution is mixed solution B, in which RuCl is added 3 The molar ratio of Ru and Pt ions in the solution is 0.5:1; finally, pure water is added in the mixed solution B to keep the concentration of cetyltrimethylammonium bromide in the mixed solution at 2 mg / mL, And add NaBH with a concentration of 0.005g / mL during stirring 4 , where NaBH 4 The molar ratio to Pt ions was 5:1, and PtRu alloy nanowires with an average diameter of 2.5 nm were obtained after continuous stirring and centrifugation.

Embodiment 2

[0012] Embodiment 2: at first, the chloroform solution of the cetyltrimethylammonium bromide that concentration is 18mg / mL and the H that concentration is 10mg / mL 2 PtCl 4 ·6H 2 O solution by cetyltrimethylammonium bromide and H 2 PtCl 4 ·6H 2 The mass ratio of Pt ions in the O solution was 1.8:1 and mixed uniformly to obtain a mixed solution A; then, in the obtained mixed solution A, FeCl with a concentration of 13 mg / mL was added 2 4H 2 O solution to get mixed solution B, wherein the FeCl added 2· 4H 2 The molar ratio of Fe in the O solution to Pt ions is 1:1; finally, add pure water to the mixed solution B to keep the concentration of cetyltrimethylammonium bromide in the mixed solution at 1.5mg / mL, and add NaBH with a concentration of 0.03g / mL during stirring 4 , where NaBH 4 The molar ratio to Pt ions is 6:1, and the PtFe alloy nanowires with an average diameter of 2.5 nm are obtained after continuous stirring and centrifugation.

Embodiment 3

[0013] Embodiment 3: at first, the chloroform solution of the hexadecyltrimethylammonium bromide that concentration is 24mg / mL and the K that concentration is 2mg / mL 2 PtCl 4 Solution according to cetyltrimethylammonium bromide and K 2 PtCl 4 The mass ratio of Pt ions in the solution was 2.3:1 and mixed uniformly to obtain mixed solution A; then, NiCl with a concentration of 8 mg / mL was added to the obtained mixed solution A 2· 6H 2 O solution to get mixed solution B, wherein the NiCl added 2· 6H 2 The molar ratio of Ni in the O solution to the Pt ion is 2:1; finally, add pure water to the mixed solution B to keep the concentration of cetyltrimethylammonium bromide in the mixed solution at 0.5mg / mL, and add NaBH with a concentration of 0.08g / mL during stirring 4 , where NaBH 4 The molar ratio to Pt ions was 8:1, and PtNi alloy nanowires with an average diameter of 2.5 nm were obtained after continuous stirring and centrifugation.

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Abstract

The invention relates to a method for preparing a one-dimensional alloy nanometer wire. A chloroformic solution of hexadecyl trimethyl ammonium bromide (abbreviated as CTAB), an aqueous solution of chloroplatinic acid or platinichloride and soluble salt, sylvite, sodium salt or an acidic solution of Ni, Pd, Au, Pb, Fe and Ru metallic ions are injected into a flask and are subjected to mechanical or magnetic stirring; after the solution is evenly mixed, the solution is added with a sodium borohydride solution for reduction, and the mixture is continuously stirred for certain time to obtain the corresponding alloy nanometer wire. The whole preparation process is convenient to operate, can be used for preparing various kinds of the alloy nanometer wires and can realize batch production. The method realizes large-scale preparation of the one-dimensional Pt-M(M=Ni, Pd, Au, Pb, Fe and Ru) alloy nanometer wire. The method has simple operation and low cost; the diameter of the obtained alloy nanometer particle is between 1.5 and 4 nm; and the alloy nanometer particle has large specific surface and thus has high application value in the field of catalysts and other fields.

Description

technical field [0001] The invention relates to a method for preparing alloy nanoparticles, in particular to a method for preparing one-dimensional Pt-M (M=Ni, Pd, Au, Pb, Fe, Ru) alloy nanowires. technical background [0002] The application of one-dimensional noble metal Pt-M (M=Ni, Pd, Au, Pb, Fe, Ru) alloy nanoparticles in fuel cell catalysis, optics, magnetic storage, biomedicine and other fields has attracted great attention. Especially in fuel cell catalysis, Pt-M (M=Ni, Pd, Au, Pb, Fe, Ru) alloy nanoparticles have shown many advantages, such as higher catalytic activity, longer catalytic life, and more low cost etc. [0003] But so far, the reports on the preparation and synthesis of one-dimensional Pt-M alloy nanoparticles are limited to the template method, but the output of the template method is limited, and the operation process is complicated, the preparation cost is high, and the diameter of the obtained nanowires is generally greater than 20nm. low, thus gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 杨生春杨志懋丁秉钧宋晓平
Owner XI AN JIAOTONG UNIV
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