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標題: Organic redox probes for the key oxidation states in mixed valence ruthenium oxide/cyanometallate (ruthenium Prussian blue analogue) catalysts
作者: Kumar, A.S.
Zen, J.M.
關鍵字: redox behavior;mixed valence ruthenium oxide cyanametallate;Prussian;blue analogues;glassy-carbon electrode;oxide preparation temperature;chromate;conversion coatings;electrocatalytic oxidation;electrochemical-behavior;amperometric detection;alkaline-solution;film electrodes;n-nitrosamines;inorganic film
Project: Electroanalysis
期刊/報告no:: Electroanalysis, Volume 16, Issue 15, Page(s) 1211-1220.
The electrochemical redox behavior of the polynuclear mixed valence ruthenium oxide cyanometallate complexes (mvRuOx-MCN, M=Fe, Cr, Ni, Cu, Ru and Pt) have been systematically studied in this report by using three redox sensitive organic probes of glucose, ethanol and formaldehyde. The results were interpreted by the well-established ruthenium oxide and Prussian blue chemistry. The mvRuOx-MCN, under the category of Ru-based Prussian blue analogue, was found to possess superior electrocatalytic activity than either ruthenium oxide or Prussian blue in acidic mediums. The electrogenerated oxy/hydroxy-Ru-VII state (at + 1.1 V vs. Ag/AgCl) was unusually stabilized in the mvRuOx-MCN matrix without any disproportion reaction in acidic environments. In contrast to those of earlier studies, possible structure in terms of the -Ru-III/II-NC-M-and -Ru-III/II-O-Ru-VII/VI-sites was proposed here. Enzyme-less analytical detection of glucose in acidic conditions was first time demonstrated with sensitivity comparable to that of ruthenium oxide-based electrodes in alkaline solutions.
ISSN: 1040-0397
DOI: 10.1002/elan.200302940
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