Lattice Oxygen Exchange in Rutile IrO<sub>2</sub> during the Oxygen Evolution Reaction
Kevin Schweinar, Baptiste Gault, Isabelle Mouton, Olga Kasian
Abstract
at the atomic scale by a combination of isotope labeling and atom probe tomography and reveal the exchange of oxygen atoms between the oxide lattice and water. Our approach enables direct visualization of the electrochemically active volume of the catalysts and allows for the estimation of an oxygen exchange rate during the OER that is discussed in view of surface restructuring and subsequent degradation. Our work presents an unprecedented opportunity to quantitatively assess the exchange of surface species during an electrochemical reaction, relevant for the optimization of the long-term stability of catalytic systems.
Topics & Concepts
Oxygen evolutionCatalysisRutileOxygenOxideChemistryElectrochemistryChemical physicsChemical engineeringInorganic chemistryMaterials sciencePhysical chemistryElectrodeEngineeringOrganic chemistryBiochemistryElectrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceFuel Cells and Related Materials