Preparation method of high-stability and high-activity carbon-supported Pt-based catalyst for fuel cell

A high stability, fuel cell technology, applied in the field of electrochemistry, can solve the problems of low catalyst stability, poor cycle stability, and difficult preparation process, etc., and achieve the effect of increased mass activity, good stability, and high cycle stability

Active Publication Date: 2013-07-10
HARBIN INST OF TECH
View PDF7 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low stability, low catalytic activity, poor cycle stability, difficult preparation process, high energy consumption and environmental pollut...

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
  • Preparation method of high-stability and high-activity carbon-supported Pt-based catalyst for fuel cell
  • Preparation method of high-stability and high-activity carbon-supported Pt-based catalyst for fuel cell
  • Preparation method of high-stability and high-activity carbon-supported Pt-based catalyst for fuel cell

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Specific embodiment one: the high stability of a kind of fuel cell of the present embodiment, the preparation method of highly active carbon-supported Pt-based catalyst is carried out according to the following steps:

[0017] 1. Pretreatment of the carbon carrier: cleaning the surface of the carbon carrier or oxidizing the carbon carrier to obtain the treated carbon carrier;

[0018] Two, the introduction of the carbon-nitrogen heterocyclic structure on the carbon carrier: the mass ratio of the carbon carrier after the treatment in step 1 and the carbon-nitrogen heterocyclic structure compound is 1: (1~100), and the carbon nitrogen heterocyclic structure compound after the treatment in step 1 The ratio of the mass of the carrier to the volume of the deionized water is 1g: (80-100) mL, and the volume ratio of the organic solvent to the deionized water is 1:1. After the heterocyclic compound is mixed, add deionized water and an organic solvent, and treat it for 0.5h to 1...

specific Embodiment approach 2

[0021] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the cleaning and removal of impurities on the surface of the carbon carrier described in step one is carried out as follows: Treat for 5h to 7h, and then vacuum dry to complete the pretreatment of the carbon carrier to obtain the treated carbon carrier. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0022] Specific embodiment three: what this embodiment is different from specific embodiment one or two is: the method described in step 1 is carried out oxidation treatment to carbon support is as follows: by the ratio of the mass of carbon support and the volume of concentrated nitric acid is 1g: (40-60) mL, add concentrated nitric acid to the carbon carrier, under the condition of 80-100 ° C, reflux for 1h-3h, then cool to room temperature, and then the ratio of the mass of the carbon carrier to the volume of deionized water is 1g: (100~500)mL, add deionized water to dilute, at room temperature, stir at a stirring speed of 100r / min~500r / min, stir for 10h~14h, and finally wash with deionized water until neutral, at a temperature of 70~ Under the vacuum condition of 90° C., dry for 9-11 hours to complete the pretreatment of the carbon carrier to obtain the treated carbon carrier. Other steps and parameters are the same as those in Embodiment 1 or 2.

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
Resistivityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a high-stability and high-activity carbon-supported Pt-based catalyst for a fuel cell, relates to the technical field of electrochemistry and aims to solve the problems of low stability and catalytic activity, poor circulating stability, difficult preparation process, high energy consumption and environment pollution of a catalyst used in the traditional fuel cell. The preparation method comprises the following steps of: firstly, pretreating a carbon support; secondly, introducing a carbon and nitrogen heterocyclic structure on the carbon support; and thirdly, preparing the carbon-supported Pt-based catalyst. The catalyst provided by the invention is small in particle size up to 1-2nm, good in dispersibility and stability and high in activity and has the electrochemical active area of 88m<2>/gPt and the change rate of 12% after being aged for 1000 circles; and when the voltage is 0.8V (vs.RHE), the catalyst has the oxidation reduction reaction activity ik of 356A/gPt and the change rate of 4% after being aged for 1000 circles, is high in cycling stability and can be applied to the field of electrochemistry.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a method for preparing a highly stable and highly active carbon-supported Pt-based catalyst for a fuel cell. Background technique [0002] As an efficient and pollution-free energy conversion device, fuel cells have received a lot of attention since Gove first proposed this concept in 1839. Among the many types of fuel cells that have been put into production, proton exchange membrane fuel cells are the most widely used due to their high energy density and low operating temperature. Nevertheless, the catalyst performance of this fuel cell still needs to be improved, especially in terms of stability. Current research shows that the catalyst performance decay mechanism of this kind of fuel cell mainly focuses on the following points: 1) migration and agglomeration of Pt particles on the surface of the carrier; 2) dissolution and redeposition of Pt particles; of falling off. For 3...

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): B01J23/42B01J31/02H01M4/92
CPCY02E60/50
Inventor 尹鸽平刘慧杜春雨王振波高云智张生
Owner HARBIN INST OF TECH
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