Multiple selectivity-determining mechanisms of H<sub>2</sub>O<sub>2</sub>formation in iron porphyrin-catalysed oxygen reduction
Anna C. Brezny, Hannah S. Nedzbala, James M. Mayer
Abstract
Multiple H2O2-forming mechanisms are accessible in Fe(porphyrin)-catalysed oxygen reduction, a key reaction in both fuel cell technologies and oxygen-utilizing enzymes. Our kinetic analysis reveals that the porphyrin secondary structure dictates the pathway for H2O2 formation. This approach is generalizable to other electrocatalytic processes and provides insight into the selectivity-determining steps.
Topics & Concepts
PorphyrinSelectivityChemistryOxygenPhotochemistryOxygen reduction reactionOxygen reductionFuel cellsCombinatorial chemistryCatalysisInorganic chemistryOrganic chemistryChemical engineeringElectrochemistryElectrodePhysical chemistryEngineeringElectrocatalysts for Energy ConversionMetal-Catalyzed Oxygenation MechanismsCO2 Reduction Techniques and Catalysts