Various carbon-free supports for fuel cell catalyst, particularly metal oxides, have been investigated for carbon alternatives. Among them, titanium oxide supports have longer durability, improved catalytic activity and various photovoltaic side effects. Moreover, arrayed titanium oxide nanotubes(TONT) exhibit enhanced surface area and provide pathway for ions and electrons. Despite those advantages, multilateral analysis for TONT catalysts was restricted until the present. Because Ti metal foil was utilized for TONT formation, and this form is not suitable for various rotating electrodes. In this study, TONT from directly sputtered Ti layer on electrode is applied to fuel cell for the first time. As deposited Ti metal film is anodized, and Pt particles are detached on/inside TONT by photo irradiation method. Optional heat treatment under hydrogen atmosphere was performed for SMSI effect (oxidation state and electronic structure tuning). Electrochemical(CV, ECSA, RDE), morphology(TEM, SEM) and electronic structure(XRD, XPS, XAFS) analysis are conducted.

Pt-TONT electro-catalyst layer prepared by RF sputtering Ti thin film for fuel cell application

244th National Meeting (2012)

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