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

Preparation method of anti-sulfide-poisoning fuel cell cathode catalyst

A fuel cell cathode and anti-sulfide technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, battery electrodes, etc., can solve problems such as easy sulfide poisoning, and the method is simple and easy Excellent anti-sulfide poisoning performance, the effect of overcoming easy sulfide poisoning

Inactive Publication Date: 2012-02-22
CHONGQING UNIV
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of an anti-sulfide poisoning fuel cell cathode catalyst for the shortcomings of existing fuel cell platinum-based catalysts that are prone to sulfide poisoning

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 anti-sulfide-poisoning fuel cell cathode catalyst
  • Preparation method of anti-sulfide-poisoning fuel cell cathode catalyst
  • Preparation method of anti-sulfide-poisoning fuel cell cathode catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Functionalization of carbon supports

[0038] Weigh 1 gram of commercially available Vulcan XC-72 carbon powder, add 150 ml of a mixed solution of 30% hydrogen peroxide and concentrated sulfuric acid with a volume ratio of 1:4, stir ultrasonically for 3 hours, dilute with ultrapure water, and let stand After 24 hours, the supernatant was filtered out, washed by centrifugation for several times, dried, and ground to obtain functionalized Vulcan XC-72 carbon powder.

[0039] (2)MoO 3 Preparation of / C catalyst

[0040] According to functionalized Vulcan XC-72 carbon powder: ammonium molybdate mass ratio is 1: 0.05 to take the functionalized VulcanXC-72 carbon powder and ammonium molybdate of step (1) gained, then take deionized water as solvent under ultrasonic stirring condition Oscillate evenly, continue to stir for 12 hours, and evaporate to dryness at 80°C. After grinding, keep the mixture powder at 180°C in a nitrogen atmosphere for 30 minutes, then continue to...

Embodiment 2

[0046] Step (1) is the same as step (1) in Example 1.

[0047] (2)MoO 3 Preparation of / C catalyst

[0048] Take the functionalized VulcanXC-72 carbon powder and molybdenum chloride obtained in step (1) by weighing the functionalized Vulcan XC-72 carbon powder: molybdenum chloride mass ratio of 1: 0.01, then use deionized water as a solvent under ultrasonic stirring conditions Shake evenly under the hood, continue to stir for 15 hours, evaporate to dryness at 60°C, keep the mixture powder at 120°C in an argon atmosphere for 60 minutes after grinding, then continue to heat up to 450°C and keep it for 8 hours, and obtain MoO after cooling 3 / C Catalyst.

[0049] (3) Preparation of Pt-MoO 3 / C Catalyst

[0050] Chloroplatinic acid: sodium citrate: MoO 3 The mass ratio of / C is 1: 3: 1 and takes by weighing the MoO obtained from chloroplatinic acid, sodium citrate and step (2) 3 / C catalyst, adding all MoO to excess ethylene glycol solvent 3 / C catalyst, sodium citrate and ...

Embodiment 3

[0054] Step (1) is the same as step (1) in Example 1.

[0055] (2)MoO 3 Preparation of / C catalyst

[0056] Weigh the functionalized VulcanXC-72 carbon powder and molybdic acid obtained in step (1) according to the functionalized Vulcan XC-72 carbon powder: molybdic acid mass ratio of 1:0.1, and then use deionized water as a solvent to vibrate under ultrasonic stirring conditions Evenly, continue to stir for 24 hours, evaporate to dryness at 95°C, keep the mixture powder at 100°C in a nitrogen atmosphere for 40 minutes after grinding, then continue to heat up to 400°C and keep for 4 hours, and obtain MoO after cooling 3 / C Catalyst.

[0057] (3) Preparation of Pt-MoO 3 / C Catalyst

[0058] Chloroplatinic acid: sodium citrate: MoO 3 The mass ratio of / C is 1: 1: 4 and takes by weighing the MoO obtained from chloroplatinic acid, sodium citrate and step (2) 3 / C catalyst, adding all MoO to excess ethylene glycol solvent 3 / C catalyst, sodium citrate and chloroplatinic acid...

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
quality scoreaaaaaaaaaa
Login to View More

Abstract

The invention aims to provide a preparation method of an anti-sulfide-poisoning fuel cell cathode catalyst specific to the defect of easiness of sulfide poisoning in the conventional fuel cell platinum-based catalyst. The method comprises the following steps of: chemically adsorbing molybdate onto functional Vulcan XC-72 carbon powder; baking under the protection of a nitrogen or argon atmosphere to obtain MoO3 / C; loading platinum onto MoO3 / C with a chemical reduction method; and changing the electronic configuration of Pt by using the synergistic effect between MoO3 and Pt, so that platinum has high sulfide poisoning resistance. The method is simple and practical and has low production cost. The catalyst prepared with the method can be applied to a fuel cell in which a proton exchange membrane is taken as an electrolyte. The fuel cell manufactured with the method is widely applied to electric automobiles, various types of spacecraft and portable electronic equipment such as video cameras, notebook computers, electric tools and the like.

Description

1. Technical field: [0001] The invention belongs to the technical field of fuel cells, in particular to a preparation method of a cathode catalyst for an anti-sulfide poisoning fuel cell. 2. Background technology: [0002] Fuel cells have the advantages of high energy conversion efficiency, environmental friendliness, and rapid start-up at room temperature, and are considered to be the most promising chemical power sources for electric vehicles and other civilian applications in the future. So far, the most effective fuel cell cathode catalysts are still platinum-based catalysts. However, toxic gases such as carbon monoxide and sulfide can easily poison platinum-based catalysts, resulting in catalyst deactivation. Carbon monoxide can be removed by a purification device, but the purification of sulfide is difficult to achieve, and the problem of easy poisoning of platinum-based catalysts cannot be avoided, which seriously hinders the commercialization of fuel cells. Therefor...

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 Applications(China)
IPC IPC(8): B01J23/652H01M4/90
CPCY02E60/50
Inventor 魏子栋柳晓陈四国丁炜熊春纪巍嘉李晓媛李莉
Owner CHONGQING 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