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Core–shell structured SiC@C supported platinum electrocatalysts for direct methanol fuel cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
45348 46410 2014 8 PDF Available
Title
Core–shell structured SiC@C supported platinum electrocatalysts for direct methanol fuel cells
Abstract

•Core–shell structured SiC@C was prepared by graphitization of nano-SiC.•The SiC@C was used as a novel support for Pt electrocatalysts.•The Pt/SiC@C electrocatalyst had high catalytic activities for MOR and ORR.•The Pt/SiC@C electrocatalyst showed a greater stability in comparison to Pt/C.

Core–shell structured SiC@C with a nanoscale SiC core covered by a graphitic carbon shell was used as a novel support for Pt electrocatalyst in direct methanol fuel cells (DMFCs) to achieve high durability and catalytic performance. The SiC@C was prepared by graphitization of nano-SiC under a vacuum of 10−3 Pa at 1500 °C. The epitaxial growth carbon layer had a high conductivity and an affinity for Pt catalyst metal, while SiC core retained its high stability. Pt electrocatalysts supported on SiC@C (Pt/SiC@C) were prepared using a microwave heating method. The electrochemical results showed that the Pt/SiC@C electrocatalyst had much higher catalytic activities for methanol electro-oxidation and oxygen reduction reactions than the Pt/SiC. More significantly, the Pt/SiC@C electrocatalyst showed a greater stability in comparison to the traditional Pt/C. The superior electrocatalytic performances of Pt/SiC@C were ascribed to a high dispersion of Pt nanoparticles on the SiC@C support and a high stability of the SiC@C support in acid solution.

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Keywords
Nano-SiC; Graphitization; Support; Eletrocatalyst; Stability
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Core–shell structured SiC@C supported platinum electrocatalysts for direct methanol fuel cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 144, January 2014, Pages 166–173
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