Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of pt-rare earth alloy material and its preparation method and application

A technology of rare earth alloys and rare earth metals, which is applied in the field of fuel cell material preparation, can solve problems such as uncertain product structure and types, unstable catalytic activity, and complicated preparation process, and achieve superior catalytic activity and stability, wide applicability, The effect of the simple preparation process

Active Publication Date: 2021-05-07
SHAANXI NORMAL UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the Pt-based transition metal alloys prepared in the above-mentioned prior art use a large amount of Pt, the catalytic activity is extremely unstable, and the preparation process is complex, time-consuming, low-yield, and the structure and type of the prepared product are uncertain, the present invention proposes A kind of Pt-rare earth alloy material and its preparation method and application are disclosed, and its specific technical scheme and method process are as follows:

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
  • A kind of pt-rare earth alloy material and its preparation method and application
  • A kind of pt-rare earth alloy material and its preparation method and application
  • A kind of pt-rare earth alloy material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Take platinum acetylacetonate, dysprosium acetylacetonate and didodecyltrimethylammonium bromide with a mass of 17㎎, 20㎎ and 97㎎ respectively, and add them to a two-necked flask containing 5mL oleylamine, mix and shake well, and use a power Ultrasonic treatment with 600W and frequency of 40KHz for 1 hour. Under the protection of argon, heat the oil bath to 120°C and keep it for 2 hours. Rinse 5 times in a 1:2 mixture of ethanol and hexane, and add the rinsed product to 10 mL of hexane to prepare a preposition;

[0033] 2) Weigh 60㎎ of carbon black and add it into 40mL of hexane, use a power of 600W and a frequency of 40KHz for ultrasonic treatment for 30 minutes, and add the carbon black solution after ultrasonic treatment to the preparative solution prepared in step 1). Put it in the liquid (the volume ratio of the carbon black solution to the pre-liquid is 4:1), continue to use the ultrasonic wave with a power of 600W and a frequency of 40KHz for 3 hours, wash with...

Embodiment 2

[0037] 1) Take platinum acetylacetonate, dysprosium acetylacetonate and cetyltrimethylammonium bromide with a mass of 17㎎, 17㎎ and 85㎎ respectively, and add them to a two-necked flask containing 6mL trimethylenamine, mix and shake well, Ultrasonic treatment with a power of 700W and a frequency of 50KHz for 1.5 hours. Under the protection of nitrogen, the oil bath was heated to 100°C, kept for 3 hours, and then heated to 180°C, kept for 15 hours, and naturally cooled to room temperature. Rinse 8 times in the mixed solution of ethanol and hexane with a ratio of 1:1, and add the product after washing to 8 mL of hexane to prepare the pre-flush;

[0038] 2) Weigh 50㎎ of graphene (GO) and add it to 24mL of hexane, use a power of 700W and a frequency of 50KHz for ultrasonic treatment for 20 minutes, and add the ultrasonically treated graphene solution to step 1) In the prepared pre-fluid (the volume ratio of the graphene solution to the pre-fluid is 3:1), continue to use a power of 7...

Embodiment 3

[0042] 1) Take platinum acetylacetonate, dysprosium acetylacetonate and didecyltrimethylammonium bromide with a mass of 17㎎, 22㎎ and 102㎎ respectively, and add them to a two-necked flask containing 8mL trimethylenamine, mix and shake well. Ultrasonic treatment with a power of 800W and a frequency of 60KHz for 2 hours. Under the protection of helium, heat the oil bath to 150°C and keep it for 3 hours. Then continue heating to 200°C and keep it for 12 hours. Cool naturally to room temperature. Rinse 6 times in a mixed solution of ethanol and hexane with a volume ratio of 1:3, and add the washed product to 8 mL of hexane to prepare a preposition;

[0043] 2) Weigh 45㎎ of carbon nanotubes (CT) and add them into 48mL of hexane, use a power of 800W and a frequency of 60KHz for ultrasonic treatment for 40 minutes, and add the carbon nanotube solution after ultrasonic treatment to the step 1) In the prepared pre-fluid (the volume ratio of the carbon nanotube solution and the pre-fluid...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention proposes a Pt-rare earth alloy material and its preparation method and application, belonging to the technical field of fuel cell material preparation, which is composed of small particles with an average particle diameter of 5-7nm and has a face-centered cubic structure. The average particle size of the flower-shaped particles is 23-26nm. The Pt-rare earth alloy material is a single alloy phase and the Pt-rare earth alloy material is surrounded by {111} crystal planes. The Pt-rare earth alloy material of the present invention has a definite morphology and structure, and presents a single alloy phase, has good dispersion and uniformity, and has superior performance when it is used as an active component in the fuel cell cathode oxygen reduction reaction. Catalytic activity and stability.

Description

technical field [0001] The invention belongs to the technical field of fuel cell material preparation, and in particular relates to a Pt-rare earth alloy material and a preparation method and application thereof. Background technique [0002] As an electrocatalyst for fuel cells, Pt / C has limited the commercial development of fuel cells due to its high price and shortage of resources. One of the hot topics of human research. Studies have found that Pt-based transition metal alloy catalysts can reduce the amount of Pt and enhance catalytic activity, but the dealloying of transition metals in the acidic electrolyte of fuel cells makes the catalyst structure and its catalytic activity extremely unstable. [0003] In recent years, studies on Pt-based rare-earth alloys have shown that Pt and rare-earth metals have more negative alloying energy, making it difficult for rare-earth metal atoms to reach the surface of nanoparticles through diffusion due to an excessively high energy...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/92H01M4/88B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/8825H01M4/9041H01M4/9083H01M4/921H01M4/926H01M2004/8689Y02E60/50
Inventor 尹峰张亚峰秦娟冷德营刘茜茹
Owner SHAANXI NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com