<i>Operando</i>Identification of the Reversible Skin Layer on Co<sub>3</sub>O<sub>4</sub>as a Three-Dimensional Reaction Zone for Oxygen Evolution
Tim Wiegmann, Ivan Pacheco, Finn Reikowski, Jochim Stettner, Canrong Qiu, Mathilde Bouvier, Manon Bertram, Firas Faisal, Olaf Brummel, Jörg Libuda, Jakub Drnec, P. Allongue, Fouad Maroun, Olaf M. Magnussen
Abstract
surface X-ray diffraction measurements that these differences are clearly correlated with the average thickness of the skin layer. The OER reactivity increases with the amount of formed skin layer, indicating that the entire three-dimensional skin layer is an OER-active interphase. Furthermore, a scaling relationship between the reaction centers in the skin layer and the OER activity is established. It suggests that two lattice sites are involved in the OER mechanism.
Topics & Concepts
OverpotentialOxygen evolutionReactivity (psychology)CatalysisSpinelChemistryMaterials scienceElectrodeChemical engineeringPhysical chemistryElectrochemistryMetallurgyOrganic chemistryEngineeringMedicineAlternative medicinePathologyElectrocatalysts for Energy ConversionElectrochemical Analysis and ApplicationsAdvanced battery technologies research