Non-redox doping boosts oxygen evolution electrocatalysis on hematite
Huu Chuong Nguyën, Felipe A. Garcés‐Pineda, Mabel de Fez-Febré, José Ramón Galán‐Mascarós, Núria López
Abstract
a two-site reaction, where the four electron oxidation reaction starts on Fe, but is completed on Zn after thermodynamically favoured proton coupled electron transfer between adjacent metal centres. This unique behaviour is prompted by the non-redox character of Zn centres, which maintain the same charge during OER. Our results open an alternative role for dopants on oxide surfaces and provide a powerful approach for catalytic optimisation of oxides, including but not limited to highly preferred all-iron oxides.
Topics & Concepts
ElectrocatalystHematiteOxygen evolutionRedoxDopingChemistryCatalysisOxygenOxygen reductionInorganic chemistryMaterials scienceElectrochemistryMineralogyElectrodePhysical chemistryBiochemistryOptoelectronicsOrganic chemistryElectrocatalysts for Energy ConversionElectrochemical Analysis and ApplicationsAdvanced battery technologies research