Macroscopically large-area two-dimensional hollow continuous self-supporting corrugated metal platinum nanoarray films with excellent electrocatalytic activity

A nano-array, large-area technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, to achieve excellent electrocatalytic properties, easy preparation, and low cost effects

Active Publication Date: 2021-07-27
HANGZHOU NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, despite efforts to reveal the electrocatalytic properties of individual nanohollow materials, it is still necessary to obtain Pt nanohollow structures with well-tuned morphology and smaller size and assemble them into two-dimensional materials to achieve synergistically enhanced catalytic performance of individual and overall structures. Role remains a major challenge

Method used

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  • Macroscopically large-area two-dimensional hollow continuous self-supporting corrugated metal platinum nanoarray films with excellent electrocatalytic activity
  • Macroscopically large-area two-dimensional hollow continuous self-supporting corrugated metal platinum nanoarray films with excellent electrocatalytic activity
  • Macroscopically large-area two-dimensional hollow continuous self-supporting corrugated metal platinum nanoarray films with excellent electrocatalytic activity

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preparation example Construction

[0044] One aspect of the embodiments of the present invention provides a method for preparing a macroscopic large-area two-dimensional hollow self-supporting corrugated metal platinum nanoarray film, which includes:

[0045] Synthesize polystyrene beads of uniform size (2.1±0.2μm) with good dispersibility in ethanol or water by means of dispersion polymerization;

[0046] Through the air-liquid interface assembly method, the polystyrene beads are tightly self-assembled at the air-liquid interface to form a macroscopic large-area monolayer film of polystyrene beads;

[0047] Through the control of the high-temperature vacuum sputtering time of metal platinum, the thickness of the metal nano-platinum film can be adjusted, so that the structure of the two-dimensional self-supporting corrugated metal platinum nano-array film is clear and controllable;

[0048] The hollow structure of the two-dimensional self-supporting corrugated metal platinum nanoarray film is realized by the sa...

Embodiment 1

[0056] Embodiment 1: Macroscopically large area two-dimensional hollow self-supporting corrugated metal platinum nanoarray film of 3nm thickness metal platinum thickness

[0057] (1) Preparation of (2.1±0.2μm) polystyrene pellets: The preparation of polystyrene pellets is by dispersion polymerization, and the main steps include:

[0058] Weigh 0.065g of azobisisobutyl and pour it into a three-necked flask containing 20mL of ethanol, set up a condensation device, and set the temperature at 70°C and 700rpm. Weigh 6.5 g of styrene monomer and 0.65 g of polyvinylpyrrolidone into a three-neck flask at 70° C. and continue heating and stirring for 10 h. Regulating the heating temperature and time can regulate the size of the polystyrene pellets. After the reaction, the product was centrifuged at 4500rpm for 10min. The supernatant was then removed and the precipitated polystyrene pellets were dried at room temperature.

[0059] (2) Hydrophilic treatment of the substrate

[0060] F...

Embodiment 2

[0069] Example 2: A macroscopically large-area two-dimensional hollow self-supporting corrugated metal platinum nanoarray film with a thickness of 6nm metal platinum

[0070] The sputtering time of step (4) in Example 1 was changed to 1 min, and other experimental conditions were consistent with Example 1.

[0071] image 3 b is the SEM image of the macroscopic large-area two-dimensional hollow self-supporting corrugated metal platinum nanoarray film with a thickness of 6 nm metal platinum obtained after sacrificing the template in Example 2. Scale bar is 5 μm.

[0072] Figure 4 It is a side SEM image of a macroscopic large-area two-dimensional hollow self-supporting corrugated metal platinum nanoarray film with a thickness of 6 nm metal platinum obtained after sacrificing the template in Example 2, and the scale is 5 μm. The inset is a magnified structure, the scale bar is 1 μm.

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Abstract

The invention discloses a macroscopic large-area two-dimensional hollow continuous self-supporting corrugated metal platinum nano-array film with excellent electrocatalytic activity. The thin film is a hollow self-supporting two-dimensional array structure, and its surface is corrugated. Through the method of air-liquid interface assembly, the polystyrene beads are tightly self-assembled into a two-dimensional large-area monolayer film at the interface of water and air; cover the surface to form a large-area platinum nanofilm with a thickness of 3nm to 12nm; just remove the polystyrene ball as a template. The macroscopically large-area two-dimensional hollow self-supporting corrugated metal platinum nanoarray film with excellent electrocatalytic activity of the present invention has a novel structure, is easy to prepare, and has low cost, and can synthesize a macroscopically large-area platinum nanofilm corrugated new structure, which can be applied Fuel cells and other fields.

Description

technical field [0001] The invention belongs to the field of nano-film / fuel cell new energy, relates to a novel fuel cell nano-catalyst material, in particular to a novel two-dimensional hollow continuous self-supporting corrugated metal platinum nano-array film with excellent electrocatalytic activity and a preparation method thereof , and its research application in fuel cell catalysis. Background technique [0002] For a long time, people have been working on fuel cell technology, which is expected to replace traditional fossil fuels to solve a series of problems, such as energy consumption and environmental pollution caused by the latter. In the past decade, more and more emerging industries around the world, such as portable power banks and fuel cell vehicles based on clean fuel cell technology, have put forward higher and higher demands on the energy density, volume and stability of fuel cells. Require. [0003] As a green fuel liquid, ethanol has many fascinating ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/92H01M8/1009B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/8814H01M4/8871H01M4/92H01M8/1009Y02E60/50Y02P70/50
Inventor 黄又举林晗郭智勇
Owner HANGZHOU NORMAL UNIVERSITY
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