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

doi:10.1149/1.3152333

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

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	B123-B125
Journal	Electrochemical and Solid-State Letters
Volume	12
Issue number	9
DOIs	https://doi.org/10.1149/1.3152333
State	Published - 2009

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abstract = "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.",

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AU - Lee, Woo Jin

AU - Macy, Nathan L.

AU - Smyrl, William H.

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AB - 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.

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