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Preparation method of carbon-supported Pt/M heterostructure nanowire electrocatalyst and an application

A heterogeneous structure, rice wire technology, applied in nanotechnology, structural parts, circuits, etc., to achieve high length/diameter ratio, increase the number of attachment sites, and facilitate large-scale production

Active Publication Date: 2020-05-08
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no carbon-supported Pt / M heterostructure nanowire electrocatalysts suitable for anode hydrogen oxidation reactions in hydroxide exchange membrane fuel cells have been reported.

Method used

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  • Preparation method of carbon-supported Pt/M heterostructure nanowire electrocatalyst and an application
  • Preparation method of carbon-supported Pt/M heterostructure nanowire electrocatalyst and an application
  • Preparation method of carbon-supported Pt/M heterostructure nanowire electrocatalyst and an application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of Pt / NiO heterostructure nanowires

[0041] Disperse platinum acetylacetonate (15.0mg), nickel acetylacetonate (10.0mg) and hexadecyltrimethylammonium bromide (60.0mg) in oleylamine (4.5ml) / oleic acid (0.5ml) and sonicate for 20min ; Add molybdenum carbonyl (15mg), and then ultrasonic 20min; at 25 ℃, CO atmosphere, replace the air in the reaction system for 20min; raise the temperature and maintain 3h at 180 ℃; cool to room temperature, centrifugal washing, dispersed in cyclohexane ( 2ml) for use.

[0042] (2) Preparation of carbon-supported Pt / NiO heterostructure nanowire electrocatalysts

[0043] Disperse activated carbon (50mg) in ethanol (5ml) / cyclohexane (5ml), and sonicate for 30min to obtain a suspension; add dispersed Pt / NiO heterostructure nanowires (2ml), and sonicate for 30min; centrifuge, wash and dry A carbon-supported Pt / NiO heterostructure nanowire electrocatalyst was obtained.

[0044] like figure 1 , TEM results show that the produc...

Embodiment 2

[0050] (1) Preparation of Pt / NiO heterostructure nanowires

[0051] Disperse platinum acetylacetonate (50.0mg), nickel acetylacetonate (30.0mg) and dioctadecyldimethylamine bromide (150.0mg) in oleylamine (15.0ml), sonicate for 30min; add molybdenum carbonyl (90mg ), then ultrasonic for 20min; at 25℃, N 2 Under the atmosphere, the air in the reaction system was replaced for 30 minutes; the temperature was increased and maintained at 185° C. for 2 hours; cooled to room temperature, washed by centrifugation, and dispersed in cyclohexane (6 ml) for use.

[0052] (2) Preparation of carbon-supported Pt / NiO heterostructure nanowire electrocatalysts

[0053] Disperse activated carbon (15mg) in acetone (5ml) / cyclohexane (3ml), and sonicate for 30min to obtain a suspension; add dispersed Pt / NiO heterostructure nanowires (6ml), and sonicate for 30min; centrifuge, wash and dry A carbon-supported Pt / NiO heterostructure nanowire electrocatalyst was obtained.

[0054] like Image 6 , TE...

Embodiment 3

[0059] (1) Preparation of Pt / CuO heterostructure nanowires

[0060] Disperse platinum acetylacetonate (10.0mg), copper acetylacetonate (10.0mg) and didodecyldimethylamine bromide (90.0mg) in oleylamine (5.0ml), sonicate for 30min; add tungsten carbonyl (90mg ), then ultrasonic for 30min; at 25℃, N 2 Under the atmosphere, the air in the reaction system was replaced for 30 minutes; the temperature was increased and maintained at 185° C. for 2 hours; cooled to room temperature, washed by centrifugation, and dispersed in toluene (2 ml) for later use.

[0061] (2) Preparation of carbon-supported Pt / CuO heterostructure nanowire electrocatalysts

[0062] Disperse activated carbon (45mg) in acetone (4ml) / toluene (5ml), and sonicate for 30min to obtain a suspension; add dispersed Pt / CuO heterostructure nanowires (2ml), and sonicate for 30min; centrifuge, wash and dry to obtain carbon Supported Pt / CuO heterostructure nanowire electrocatalysts.

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Abstract

The invention belongs to the technical field of noble metal electrocatalysts, and particularly relates to a preparation method of a carbon-supported Pt / M heterostructure nanowire electrocatalyst and an application. The preparation method comprises the following steps: dispersing platinum metal salt, transition metal M salt and a surfactant into an organic reagent with reducibility, performing ultrasonic treatment, adding a structure directing agent, and performing ultrasonic treatment; under a certain atmosphere, replacing air in a reaction system; raising the temperature and maintaining for 1-5 hours at a certain temperature; performing cooling and centrifugal washing to obtain Pt / M heterostructure nanowires, and dispersing the Pt / M heterostructure nanowires in a solution for later use; dispersing a carbon carrier into the solution, and performing ultrasonic treatment to obtain turbid liquid; adding the dispersed Pt / M heterostructure nanowire, and carrying out ultrasonic treatment; and performing centrifugal washing and drying to obtain the electrocatalyst. The Pt / M heterostructure nanowire with high dispersion and high yield is prepared by regulating and controlling the reducibility of the organic reagent, controlling the reaction atmosphere and regulating the surfactant, and is suitable for the hydrogen oxidation reaction of the hydroxyl exchange membrane fuel cell anode.

Description

technical field [0001] The invention belongs to the technical field of noble metal electrocatalysts, in particular to a preparation method and application of a carbon-supported Pt / M heterostructure nanowire electrocatalyst. Background technique [0002] Fuel cells are the preferred power generation devices in the 21st century. They have the advantages of high energy conversion efficiency, low operating temperature, fast startup, and high energy density. They can be widely used in aviation, aerospace, navigation, rail transit, electronic equipment, and backup power. It is in the field of new energy vehicles and has important application value. Among different kinds of fuel cells, hydroxide exchange membrane fuel cells have attracted much attention because of the abundance of high-quality and high-performance hydroxide exchange membranes and the cathode oxygen reduction reaction (ORR, 1 / 2O 2 +H 2 O+2e - →2OH - ) non-noble metal electrocatalysts have been developed. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/92B82Y40/00
CPCB82Y40/00H01M4/8825H01M4/9016H01M4/9083H01M4/921H01M4/926Y02E60/50
Inventor 宋玉江丛媛媛赵新伟
Owner DALIAN UNIV OF TECH
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