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Coupled Triple Phase Boundary Processes: Liquid | Liquid Generator - Collector Electrodes

AutorVagin, Mikhail Yu; Karyakin, Arkady A.; Vuorema, Anne; Sillanpaa, Mika; Meadows, Helen; Campo García, Francisco Javier del; Cortina-Puig, Montserrat; Bulman Page, Phillip C.; Chan, Yohan; Marken, Frank
Palabras claveMicroelectrodos
Líquidos iónicos
Microelectrode arrays
ionic liquids
triple-phase boundary
Fecha de publicación13-ene-2010
ResumenElectrochemical processes at liquid | liquid | electrode interfaces involve simultaneous ion transfer and electron transfer. When driven at triple phase boundary electrode systems, electron and ion transfer occur in the same interfacial reaction zone. In this report, preliminary work with a novel electrode system based on two coupled triple phase boundary reaction zones is described. An inter-digitated gold band array with 7 μm gold bands separated by 13 μm gaps is employed immersed in aqueous electrolyte with a water immiscible solution of the redox system N,N-diethyl-N’N’-didodecyl-phenylenediamne (DDPD) in 4-(3-phenylpropyl)-pyridine (PPP) immobilised on the surface. Well-defined generator – collector feedback currents are observed which depend on the volume of deposit, the concentration of the redox system, and the nature of the aqueous electrolyte.
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