Surface oxide growth on platinum electrode in aqueous trifluoromethanesulfonic acid
作者： Yoshihisa Furuya , Tetsuya Mashio , Atsushi Ohma , Nilesh Dale , Kenzo Oshihara
DOI: 10.1063/1.4898707
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摘要: Platinum in the form of nanoparticles is key and most expensive component polymer electrolyte membrane fuel cells, while trifluoromethanesulfonic acid (CF3SO3H) smallest fluorinated sulfonic acid. Nafion, which acts as both separator contains –CF2SO3H groups. Consequently, research on electrochemical behaviour Pt aqueous CF3SO3H solutions creates important background knowledge that can benefit cell development. In this contribution, electro-oxidation studied 0.1 M a function polarization potential (Ep, 1.10 ≤ Ep 1.50 V), time (tp, 100 tp 104 s), temperature (T, 278 T 333 K). The critical thicknesses (X1), determines applicability oxide growth theories, determined related to thickness (dox). Because X1 > dox for entire range Ep, tp, values, formation surface follows interfacial place-exchange or metal cation escape mecha...
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