Demystifying the Role of Covalently Attached Electron–Proton Transfer Mediator in Oxygen Reduction Reaction Catalyst
Soumitra Dinda, Anjila I. Siddiqui, Snehanjali Behera, Biswajit Mondal
Abstract
The role of covalent attachment of benzoquinone/hydroquinone as electron–proton transfer mediators in ORR is investigated, and it is found that the catalysis is much more efficient as compared to Co(Sal) (Sal = salophen) alone or Co(Sal) and quinone used separately in terms of selectivity toward H 2 O formation. While Co(Sal) has only a 3% Faradaic yield for H 2 O formation, under the same conditions, the Faradaic yield for H 2 O formation is 80% with Co(Sal-H 2 Q).
Topics & Concepts
ChemistryHydroquinoneCatalysisYield (engineering)Electron transferCovalent bondFaraday efficiencySelectivityQuinoneBenzoquinonePhotochemistryProtonOxygenStereochemistryOrganic chemistryElectrochemistryPhysical chemistryMaterials scienceElectrodePhysicsMetallurgyQuantum mechanicsElectrocatalysts for Energy ConversionCO2 Reduction Techniques and CatalystsElectrochemical Analysis and Applications