PtAg nanocrystal with porous double hollow sphere structure, preparation method and application thereof

A technology of nanocrystals and nanocrystal materials, applied in the field of Pt-based alloy nanocrystals, can solve problems such as unstable structures and few active sites, and achieve the effects of reducing energy consumption, simple preparation methods, and simple operations

Inactive Publication Date: 2020-02-28
NANJING NORMAL UNIVERSITY
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing porous Pt-based catalysts also have

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • PtAg nanocrystal with porous double hollow sphere structure, preparation method and application thereof
  • PtAg nanocrystal with porous double hollow sphere structure, preparation method and application thereof
  • PtAg nanocrystal with porous double hollow sphere structure, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of porous double hollow sphere PtAg nanocrystals, comprising the following steps:

[0036] 1) Preparation of reaction solution: 8 mL of water was used as solvent, and 0.75 mL of 0.05M H 2 PtCl 6 aqueous solution with 0.25mL 0.05M AgNO 3 After the aqueous solution is mixed, it is fully ultrasonicated to make it uniform, and then 10mL (10mg / mL) N'N-methylenebisacrylamide is added, and ultrasonically mixed evenly.

[0037] 2) Preparation of porous double hollow sphere PtAg nanocrystals: put the above reaction solution in an oven at 160°C for 4 hours, after cooling to room temperature, centrifuge the obtained black precipitate at 10,000 rpm for 5 minutes, and wash it with ethanol four times. The porous double hollow sphere PtAg nanocrystals are obtained.

Embodiment 2

[0039] A preparation method of porous double hollow sphere PtAg nanocrystals, comprising the following steps:

[0040] 1) Preparation of reaction solution: 8 mL of water was used as solvent, and 0.75 mL of 0.05M H 2 PtCl 6 aqueous solution with 0.25mL 0.05M AgNO 3 After the aqueous solution is mixed, it is fully ultrasonicated to make it uniform, and then 1 mL (10 mg / mL) N’N-methylenebisacrylamide is added, and ultrasonically mixed evenly.

[0041] 2) Preparation of porous double hollow sphere PtAg nanocrystals: put the above reaction solution in an oven at 160°C for 4 hours, after cooling to room temperature, centrifuge the obtained black precipitate at 10,000 rpm for 5 minutes, and wash it with ethanol four times. The porous double hollow sphere PtAg nanocrystals are obtained.

Embodiment 3

[0043] A kind of preparation method of the preparation method of porous double hollow sphere PtAg nano crystal, comprises the following steps:

[0044]1) Preparation of reaction solution: 8 mL of water was used as solvent, and 0.75 mL of 0.05M H 2 PtCl 6 aqueous solution with 0.25mL 0.05M AgNO 3 After the aqueous solution is mixed, it is fully ultrasonicated to make it evenly mixed, and then 10mL (100mg / mL) N’N-methylenebisacrylamide is added, and ultrasonically mixed evenly.

[0045] 2) Preparation of porous double hollow sphere PtAg nanocrystals: put the above reaction solution in an oven at 160°C for 4 hours, after cooling to room temperature, centrifuge the obtained black precipitate at 10,000 rpm for 5 minutes, and wash it with ethanol four times. The porous double hollow sphere PtAg nanocrystals are obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a PtAg nanocrystal with a porous double hollow sphere structure, a preparation method thereof, and application of the material as a methanol oxidation anode catalyst. The preparation method comprises the following steps: taking Pt salt and Ag salt as metal precursors, taking N'N-methylenebisacrylamide as a structure-directing agent, adding a reducing agent and performing aone-step hydrothermal reaction to obtain the PtAg nanocrystals. The method of the invention has mild conditions and high yield, is green and pollution-free, and is suitable for commercial production.As a methanol oxidation anode catalyst, the obtained porous double hollow sphere PtAg nanocrystals have the advantages of excellent electrocatalytic activity, stability and the like.

Description

technical field [0001] The invention relates to a method for preparing PtAg nanocrystals with a porous double hollow sphere structure, a material obtained therefrom, and an application of the material as an anode catalyst for methanol oxidation, belonging to the technical field of Pt-based alloy nanocrystals. Background technique [0002] Proton exchange membrane fuel cell (Proton Electrolyte Membrane Fuel Cell, PEMFC) is a new energy device with great application prospects in the 21st century. In addition to the general advantages of fuel cells, such as high power generation efficiency and less environmental pollution, PEMFC can also be used in It has the advantages of quick start at room temperature, no electrolyte loss, high specific power and long life. However, because the key materials and key technologies of PEMFC still need further breakthroughs, and the cost needs to be greatly reduced, it cannot be further commercialized. The catalyst is the key reason for the hig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/92H01M4/88H01M8/1011
CPCH01M4/88H01M4/921H01M8/1011Y02E60/50Y02P70/50
Inventor 唐亚文姚文清李玉莲
Owner NANJING NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap