High performance of cup-stacked-type carbon nanotubes as a Pt–Ru catalyst support for fuel cell applications
Chan Kim, Yong Jung Kim, Yoong Am Kim, Takashi Yanagisawa +3
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70% confidenceCSCNT-supported Pt-Ru bimetallic catalyst exhibits twice the power density of Pt-Ru catalyst supported on Vulcan XC-72 carbon.
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Abstract
The potential of cup-stacked-type carbon nanotubes (CSCNTs) as a catalyst support for the direct methanol fuel cells has been investigated by the electrochemical oxidation of methanol at various temperatures. The CSCNT-supported platinum–ruthenium (Pt–Ru) bimetallic catalyst exhibited twice as high a power density as the Pt–Ru catalyst supported on Vulcan XC-72 carbon, which is widely used as a catalyst support for the DMFC electrodes. The microscopic analysis of the CSCNT-supported Pt–Ru catalysts revealed that the bimetallic electrocatalysts were well dispersed on the CSCNT supports, and the particle size of the electrocatalysts was ca.5nm . The results of this work indicate that the performance of the carbon support materials is largely influenced by their electrical properties, morphology and crystallographic structures.
Key findings
- CSCNT-supported Pt-Ru catalyst has a particle size of approximately 5nm.
- CSCNT-supported Pt-Ru catalyst shows high performance in direct methanol fuel cells.
- Electrical properties, morphology, and crystallographic structures of carbon support materials influence their performance.
Keywords
Identifiers
- Journal
- Journal of Applied Physics
- Year
- 2004