title: New Insights into Fundamental Electron Transfer from Single Nanoparticle Voltammetry.
abstract: The reductive redox behavior of oxygen in aqueous acid solution leading first to adsorbed superoxide species at single palladium coated multiwalled carbon nanotubes (of length ca. 5 μm and width 130 nm) is reported. The small dimensions of the electroactive surface create conditions of high mass-transport permitting the resolution of electrode kinetic effects. In combination with new theoretical models, it is shown that the physical location of the formed product within the double layer of the electrode profoundly influences the observed electron transfer kinetics. This generically important result gives new physical insights into the modeling of the many electrochemical processes involving adsorbed intermediates.
authors.affiliation: Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University , Oxford OX1 3QZ, United Kingdom.
authors.forename: Xiuting
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University , Oxford OX1 3QZ, United Kingdom.
authors.forename: Chuhong
authors.initials: C
authors.lastname: Lin
authors.affiliation: Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University , Oxford OX1 3QZ, United Kingdom.
authors.forename: Christopher
authors.initials: C
authors.lastname: Batchelor-McAuley
authors.affiliation: Departamento de Química Física, Facultad de Química, Universidad de Murcia , 30100 Murcia, Spain.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Laborda
authors.affiliation: Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power , 2103 Pingliang Road, Shanghai 200090, P. R. China.
authors.forename: Lidong
authors.initials: L
authors.lastname: Shao
authors.affiliation: Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University , Oxford OX1 3QZ, United Kingdom.
authors.forename: Richard G
authors.initials: RG
authors.lastname: Compton