Synthesis of Pt nanocatalyst with micelle-encapsulated multi-walled carbon nanotubes as support for proton exchange membrane fuel cells

J. F. Lin, C. W. Mason, A. Adame, X. Liu, Xihong Peng, Arunachala Mada Kannan

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Micelle-encapsulated multi-walled carbon nanotubes (MWCNTs) with sodium dodecyl sulfate (SDS) were used as catalyst support to deposit platinum nanoparticles. High resolution transmission electron microscopy (HRTEM) images reveal the crystalline nature of Pt nanoparticles with a diameter of ∼4 nm on the surface of MWCNTs. A single proton exchange membrane fuel cell (PEMFC) with total catalyst loading of 0.2 mg Pt cm-2 (anode 0.1 and cathode 0.1 mg Pt cm-2, respectively) has been evaluated at 80 °C with H2 and O2 gases using Nafion-212 electrolyte. Pt/MWCNTs synthesized by using modified SDS-MWCNTs with high temperature treatment (250 °C) showed a peak power density of 950 mW cm-2. Accelerated durability evaluation was carried out by conducting 1500 potential cycles between 0.1 and 1.2 V with 50 mV s-1 scan rate, H2/N 2 at 80 °C. The membrane electrode assembly (MEA) with Pt/MWCNTs showed superior performance stability with a power density degradation of only ∼30% compared to commercial Pt/C (70%) after potential cycles.

Original languageEnglish (US)
Pages (from-to)6496-6500
Number of pages5
JournalElectrochimica Acta
Volume55
Issue number22
DOIs
StatePublished - Sep 1 2010

Keywords

  • Carbon nanotubes
  • Micelle structure
  • Platinum nanoparticles
  • Proton exchange membrane fuel cell

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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