Stability and durability of PtRu catalysts supported on carbon nanofibers for direct methanol fuel cells

Segoo Kang, Seongyop Lim, Dong Hyun Peck, Sang Kyung Kim, Doo Hwan Jung, Seong Hwa Hong, Han Gi Jung, Yonggun Shul

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

The chemical stability and durability of PtRu catalysts supported on carbon nanofibers (CNFs) for the anode electrode of a direct methanol fuel cell (DMFC) are investigated by Pt and Ru dissolution tests in sulfuric acid and long-term performance tests of a single cell discharging at a constant current density of 150 mA cm -2 for approximately 2000 h. A CNF with a herringbone-type structure, which is characterized by the alignment of graphene symmetrically angled to the fiber axis, was selected as the catalyst support because it has an edge-rich surface and a high surface area. In the metal dissolution test, the PtRu/CNF catalysts showed 1.5-2 times lower Ru leaching than a tested commercial catalyst (supported on activated carbon). The results of long-term performance tests also prove the higher durability of the anode catalyst compared with the commercial catalyst, when the anode polarization is compared before and after operation for 2000 h. Some analytical measurements, including X-ray diffraction, energy dispersive spectroscopy, and transmission electron microscopy were conducted to study the degradation of the catalyst activity.

Original languageEnglish
Pages (from-to)4685-4693
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number5
DOIs
Publication statusPublished - 2012 Mar

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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