Design of an assembly of pyridine-containing polybenzimidazole, carbon nanotubes and Pt nanoparticles for a fuel cell electrocatalyst with a high electrochemically active surface area

Tsuyohiko Fujigaya, Minoru Okamoto, Naotoshi Nakashima

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

We describe the fabrication of a carbon nanotube (CNT) hybrid wrapped by pyridine-containing polybenzimidazole (PyPBI). PyPBI acts as an efficient dispersant for CNT wrapping and produces a stable complex after removal of the unbound PyPBI. We found that the wrapped PyPBI serve as a glue for immobilizing Pt nanoparticles onto the surface of multi-walled carbon nanotubes (MWCNTs) without any strong oxidation process for the MWCNTs, which is often used to produce sites where metallic nanoparticles are immobilized. Based on this method, a highly homogeneous and remarkably efficient Pt loading onto the surface of MWCNTs through a coordination reaction between Pt and PyPBI has been achieved. Cyclic voltammogram measurements have revealed that the Pt nanoparticles deposited on the PyPBI-wrapped MWCNTs have a high electrochemically active surface area. Present results provide useful information for the design and fabrication of triple-phase interface structures of fuel cell electrode catalysts with high efficient performance.

Original languageEnglish
Pages (from-to)3227-3232
Number of pages6
JournalCarbon
Volume47
Issue number14
DOIs
Publication statusPublished - Nov 1 2009

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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