Revelation of multiple underlying RuO2 redox processes associated with pseudocapacitance and electrocatalysis

Chong Lee, Alan Bond

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25 Citations (Scopus)

Abstract

Advances in basic knowledge relevant to the pseudocapacitive and electrocatalytic properties of RuO2 materials require a detailed understanding of the redox chemistry that occurs at the electrode interface. Although several redox processes have been identified via dc cyclic voltammograms derived from surface-confined RuO2 materials, mechanistic details remain limited because the faradaic signals of interest are heavily masked by the background current. Here, it is shown that the underlying electron transfer reactions associated with the VI to II oxidation states of surface-confined RuO2 materials in acidic medium are far more accessible in the background current free fourth and higher harmonic components available via large-amplitude Fourier transformed ac voltammetry.
Original languageEnglish
Pages (from-to)16155 - 16162
Number of pages8
JournalLangmuir
Volume26
Issue number20
DOIs
Publication statusPublished - 2010

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