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Sonochemical synthesis of Pt-deposited SiO2 nanocomposite and its catalytic application for polymer electrolyte membrane fuel cell under low-humidity conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
50683 46808 2012 5 PDF Available
Title
Sonochemical synthesis of Pt-deposited SiO2 nanocomposite and its catalytic application for polymer electrolyte membrane fuel cell under low-humidity conditions
Abstract

The direct deposition of platinum (Pt) nanoparticles on the surface of SiO2 without surface modification was attempted by irradiating ultrasound. This method enabled the formation of Pt nanoparticles with a narrow-sized distribution. The nanocomposites were blended with conducting carbon and applied as an anode catalyst for polymer electrolyte membrane fuel cell. With various anode relative humidity, the membrane fabricated with the catalyst exhibited tolerance toward water-deficient condition showing sustainable performance, while the membrane with commercial catalyst degraded sharply. This was attributed to the SiO2's water-uptake ability, which retained the hydration level in the membrane under low humidity.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Direct deposition of Pt on SiO2 using ultrasound without any surface modification. ► Uniform and highly disperse Pt nanoparticles on the surface of SiO2. ► Anode catalyst for PEM fuel cell operated under low humidity condition. ► The performance of Pt/SiO2 exceeds commercial Pt/C below relative humidity of 50%. ► SiO2 absorbs water molecule to maintain hydration level.

Keywords
Ultrasound; Pt nanoparticle; SiO2; Catalyst; Polymer electrolyte membrane fuel cell; Low humidity
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Sonochemical synthesis of Pt-deposited SiO2 nanocomposite and its catalytic application for polymer electrolyte membrane fuel cell under low-humidity conditions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 21, 5 May 2012, Pages 86–90
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us