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Au-Ir nano alloy, preparation method of Au-Ir nanometer alloy and application of Au-Ir nanometer alloy used as catalyst

A nano-alloy and catalyst technology, applied in nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of large difference in reduction potential and difficulty in obtaining controllable morphology

Active Publication Date: 2019-01-11
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large difference in reduction potential between Au and Ir, Au is easy to reduce, and the energy barrier for Au growth is much lower than the energy barrier for forming AuIr alloys. It is difficult to obtain AuIr nano-alloys with controllable morphology by conventional methods.
The synthesis of AuIr nanoalloys with controllable morphology has not been reported

Method used

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  • Au-Ir nano alloy, preparation method of Au-Ir nanometer alloy and application of Au-Ir nanometer alloy used as catalyst
  • Au-Ir nano alloy, preparation method of Au-Ir nanometer alloy and application of Au-Ir nanometer alloy used as catalyst
  • Au-Ir nano alloy, preparation method of Au-Ir nanometer alloy and application of Au-Ir nanometer alloy used as catalyst

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Experimental program
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Effect test

Embodiment 1

[0117] Embodiment 1: the preparation method of Au-Ir bimetallic nanoparticles

[0118] (1) Add 0.1 mmol of iridium chloride trihydrate and 0.1 mmol of tetrachloroauric acid trihydrate into a 100 ml two-necked flask, then add 35 ml of oleylamine and sonicate for 60 min to obtain mixture A.

[0119] (2) Put mixture A into an oil bath preheated to 200°C, N 2 Under the atmosphere, react for 1h to obtain the product B.

[0120] (3) Naturally cool to room temperature, centrifuge the obtained product B (12000 rpm), and wash 6 times with a mixed solution of ethanol and cyclohexane (the volume ratio of ethanol and cyclohexane is 1:1).

[0121] (4) drying at 70° C. overnight to obtain the Au-Ir bimetallic nanoparticles of the present invention.

Embodiment 2

[0122] Embodiment 2: the preparation method of Au-Ir double metal nano-octahedron

[0123] (1) 0.1mmol of iridium chloride trihydrate, 0.1mmol of tetrachloroauric acid trihydrate, 0.6mmol of tetraethylammonium bromide, 100mg of PVP (molecular weight is 40000) are joined in the 100ml two-necked flask, then add 35ml Oleylamine was sonicated for 60 min and stirred for 4 h to obtain mixture A.

[0124] (2) Put mixture A into an oil bath preheated to 220°C, N 2 Under the atmosphere, react for 1h to obtain the product B.

[0125] (3) Naturally cool to room temperature, centrifuge (12000 rpm) to obtain product B, water, ethanol, hexanaphthene and acetone mixed solution (the volume ratio of water, ethanol, hexanaphthene and acetone is 1:4:1 :2) Wash 14 times.

[0126] (4) drying at 70° C. overnight to obtain the Au-Ir bimetallic nano-octahedron of the present invention.

Embodiment 3

[0127] Embodiment 3: the preparation method of Au-Ir bimetallic nano-truncated octahedron

[0128] (1) 0.1mmol of hydrated hexachloroiridium (IV) acid, 0.1mmol of tetrachloroauric acid trihydrate, 0.6mmol of tetraethylammonium bromide, and 33.3mg of PVP (molecular weight is 55000) are added in a 100ml two-necked flask , then add 30ml oleylamine and sonicate for 60min, stir for 4h to obtain mixture A.

[0129] (2) Put mixture A into an oil bath preheated to 220°C, N 2 Under the atmosphere, react for 1h to obtain the product B.

[0130] (3) naturally cool to room temperature, obtain product B centrifugation (12000 rpm), water, ethanol, cyclohexane and acetone mixed solution (the volume ratio of ethanol, ether, normal hexane and acetone is 5:5:3: 5) Wash 12 times.

[0131] (4) drying at 70° C. overnight to obtain the Au-Ir bimetallic nano-truncated octahedra of the present invention.

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Abstract

The invention discloses an Au-Ir nano alloy. The particle size of the Au-Ir nano alloy is 5-10nm; and the molar ratio of Au to Ir in the Au-Ir nano alloy is (1:3)-(9:1). The particle size of the Au-Irnano alloy is small, the Au-Ir nano alloy has an extremely large specific surface area and more active sites, the morphology of the Au-Ir nano alloy is adjustable, and different product selectivity is shown in electro-catalysis carbon dioxide.

Description

technical field [0001] The application relates to an Au-Ir nano-alloy, its preparation method and its application as a catalyst, belonging to the field of nano-material synthesis. Background technique [0002] Since the 21st century, with the large-scale use of fossil fuels, CO 2 At the same time, the energy crisis is also increasing, which greatly affects people's survival and development. Therefore, people are working hard to develop various new energy sources that meet the requirements to reduce their dependence on fossil fuels. CO 2 Abundant reserves on the earth, non-toxic, if the CO 2 As a carbon source, it is used to synthesize various organic small molecules with high economic added value, such as: carbon monoxide (CO), formic acid (HCOOH), methanol (CH 3 OH), methane (CH 4 ) and other available renewable resources. This not only reduces the CO 2 Accumulate in the atmosphere, and can produce various usable fuels and useful industrial chemical raw materials, sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00C25B1/00C25B11/06
CPCC25B1/00B82Y30/00B82Y40/00B22F9/24C25B11/097B22F1/054
Inventor 王慧敏曹敏纳曹荣
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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