Improved electrochemical performances by carbon nanocapsules as an electrocatalyst support for direct methanol fuel cells

Y. M. Chang, Y. C. Hsieh, Pu-Wei Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The carbon nanocapsules (CNCs) were evaluated as a catalyst support for direct methanol fuel cells (DMFC). The gas diffusion electrodes (GDE) of CNCs exhibited smaller pores, higher electrochemical surface areas, lower charge transfer resistances, and reduced resistivities as compared to those of Vulcan XC72R (VXC72R). The observed superiorities were attributed to their narrow size distributions and graphene layers on the perimeters. In addition, binary PtRu nanoparticles were synthesized and impregnated to the CNCs and VXC72R. The images from the transmission electron microscope indicated that the PtRu nanoparticles were dispersed better in the CNCs, resulting in relatively reduced particle sizes and greater uniformity. In cyclic voltammery, the PtRu/CNCs catalyzed GDEs revealed significantly larger current responses with lower onset potentials as compared to those of PtRu/VXC72R. Our results confirm the superb characteristic of CNCs as an electrocatalyst support for DMFC applications.

Original languageEnglish
Pages (from-to)501-504
Number of pages4
JournalDiamond and Related Materials
Volume18
Issue number2-3
DOIs
StatePublished - 1 Feb 2009

Keywords

  • Catalytic processes
  • Direct methanol fuel cells
  • Electrochemical properties
  • Nanoparticles

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