Electrochemical durability investigation of Pt/ TiO2 nanotube catalysts for polymer electrolyte membrane fuel cells

Dong Ha Lim, Woo Jin Lee, Nathan L. Macy, William H. Smyrl

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


We examined the durability of Pt sputtered onto TiO2 nanotubes (Pt/TONTs) using accelerated durability tests and extended fuel cell operation time. From the cyclic voltammograms, a threshold potential was found at 0.75 V, below which there was an oxide-free Pt surface that showed the best catalytic activity for the O2 reduction reaction. The Pt/TONT catalyst was durable, as shown by only small amounts of degradation of the active surface area and power values. We suggest that the catalytic activity of Pt/TONT catalyst does not show any dissolution or agglomeration such as is well known for Pt on carbon supports.

Original languageEnglish (US)
Pages (from-to)B123-B125
JournalElectrochemical and Solid-State Letters
Issue number9
StatePublished - 2009


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