title: Chronocoulometric study of the electrochemistry of Prussian blue.
abstract: During the electrochemical oxidation of Prussian blue (PB) to Prussian yellow (PY), an electrocatalytic oxygen production proceeds at the electrode when aqueous electrolyte solutions are used. The formed oxygen is scavenged by the PY, probably by absorption, and it is consumed during the electrochemical reduction of PY to PB by a heterogeneous chemical reaction of PB with oxygen to PY and hydrogen peroxide. Because of this catalytic regeneration of PY, it is impossible to determine the amount of low-spin iron by chronocoulometry using a potential program in which PB is first oxidized to PY and then the charge is measured to reduce PY to PB. The latter charge is biased by the electrocatalytic PY regeneration.
authors.affiliation: Instituto de Química, Pontificia Universidad Católica de Valparaíso, Avda. Brasil 2950, Valparaíso, Chile.
authors.forename: Marco
authors.initials: M
authors.lastname: Orellana
authors.forename: Pamela
authors.initials: P
authors.lastname: Arriola
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Del Río
authors.forename: Ricardo
authors.initials: R
authors.lastname: Schrebler
authors.forename: Ricardo
authors.initials: R
authors.lastname: Cordova
authors.forename: Fritz
authors.initials: F
authors.lastname: Scholz
authors.forename: Heike
authors.initials: H
authors.lastname: Kahlert