Ultrafine ptrh nanowire and its catalyst preparation method and application

A nanowire and catalyst technology, applied in the field of precious metal nanocatalysts, can solve the problems such as the rapid preparation of Pt ultrafine nanowires that has not been reported yet, and achieve the effects of high catalytic activity and catalytic stability, stability improvement, and quality activity improvement.

Active Publication Date: 2018-12-07
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no one has reported the rapid preparation of Pt ultrafine nanowires doped with a small amount of Rh

Method used

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  • Ultrafine ptrh nanowire and its catalyst preparation method and application
  • Ultrafine ptrh nanowire and its catalyst preparation method and application
  • Ultrafine ptrh nanowire and its catalyst preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0043] A kind of preparation method of the superfine PtRh nanowire that the present invention proposes, successively add platinum acetylacetonate, rhodium acetylacetonate and didodecyl dimethyl ammonium bromide in oleylamine and carry out ultrasonic treatment to obtain mixed solution; Add tungsten carbonyl to the mixture, raise the temperature to carry out high-temperature reaction, cool to room temperature, wash, and dry to obtain ultrafine PtRh nanowires.

[0044] A kind of preparation method of PtRh / C metal nano-catalyst that the present invention proposes, the hexane solution containing above-mentioned superfine PtRh nanowire is slowly injected in the hexane solution of carbon black to obtain solution A, ultrasonic treatment, cleaning, drying obtains PtRh / C C metal nanocatalysts.

Embodiment 2

[0046]The preparation method of a kind of superfine PtRh nano wire that the present invention proposes, successively add platinum acetylacetonate, rhodium acetylacetonate and didodecyl dimethyl ammonium bromide in oleylamine and ultrasonically treat for 0.4h to obtain a mixed solution, acetylacetonate The mass volume ratio (mg / mL) of platinum and oleylamine is 30:4.8, the mass volume ratio (mg / mL) of rhodium acetylacetonate and oleylamine is 3.5:4.8, didodecyldimethylammonium bromide and The mass-volume ratio (mg / mL) of oleylamine is 95:4.8; add tungsten carbonyl to the mixture, the mass-volume ratio (mg / mL) of tungsten carbonyl and oleylamine is 11:4.8, heat up for high-temperature reaction, high-temperature reaction The temperature is 185°C, the high-temperature reaction time is 1.5hh, cooled to room temperature, and the material after cooling to room temperature is centrifuged, the speed of centrifugation is 16000 rpm, and the time of centrifugation is 5min. The non-polar s...

Embodiment 3

[0049] The preparation method of a kind of ultrafine PtRh nanowire that the present invention proposes, successively add platinum acetylacetonate, rhodium acetylacetonate and didodecyl dimethyl ammonium bromide into oleylamine and ultrasonically treat for 0.6h to obtain a mixed solution, acetylacetonate The mass volume ratio (mg / mL) of platinum and oleylamine is 28:5.2, the mass volume ratio (mg / mL) of rhodium acetylacetonate and oleylamine is 2.7:5.2, didodecyldimethylammonium bromide and The mass-volume ratio (mg / mL) of oleylamine is 85:5.2; add tungsten carbonyl to the mixture, the mass-volume ratio (mg / mL) of tungsten carbonyl and oleylamine is 9:5.2, and heat up for high-temperature reaction. The temperature is 175°C, the high temperature reaction time is 2.5h, cooled to room temperature, and the material after cooling to room temperature is subjected to centrifugation, the speed of centrifugation is 15000 rpm, and the time of centrifugation is 7min, and the centrifuged pr...

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Abstract

The invention discloses an ultrafine PtRh nanowire, wherein Rh atoms are uniformly doped in the Pt ultrafine nanowire. The invention also discloses a preparation method of the ultrafine PtRh nano wire. The invention also discloses a PtRh / C metal nanometer catalyst. The invention also discloses a preparation method of the above-mentioned PtRh / C metal nano catalyst. The invention also discloses the application of the above-mentioned PtRh / C metal nano-catalyst as a catalyst in the fuel cell cathode oxygen reduction reaction process. The nano crystal obtained by the invention has uniform size, good dispersion, good stability and high catalytic activity.

Description

technical field [0001] The invention relates to the technical field of noble metal nano catalysts, in particular to ultrafine PtRh nano wires and a preparation method thereof, and a PtRh / C metal nano catalyst and a preparation method and application thereof. Background technique [0002] With the development of global economy, human's demand for energy is increasing day by day. Fossil energy is currently the main source of energy for human beings, and the use of a large amount of fossil energy has caused energy shortages and a series of environmental problems. Therefore, it is urgent to develop clean energy. In recent years, proton exchange membrane fuel cells have been widely concerned by scientists from various countries. It is a power generation device that can directly convert chemical energy into electrical energy. It has the advantages of high power density, high energy conversion efficiency, green environmental protection, and simple structure. The commonly used ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/24B01J23/656B82Y30/00B82Y40/00H01M4/92
CPCH01M4/921H01M4/926B82Y30/00B82Y40/00B01J23/6567B01J35/023B01J35/06B22F9/24B22F1/0547B22F1/07Y02E60/50
Inventor 叶春苗李衎黄宏文曾杰
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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