Degradation and regeneration of Fe–N<sub><i>x</i></sub> active sites for the oxygen reduction reaction: the role of surface oxidation, Fe demetallation and local carbon microporosity
Dongsheng Xia, Chenchen Yu, Yinghao Zhao, Yinping Wei, Haiyan Wu, Yongqiang Kang, Jia Li, Lin Gan, Feiyu Kang
Abstract
The Fe demetallation constitutes the main reason for the degradation of Fe–N–C catalysts, while previously-reported carbon surface oxidation plays a minor role. Post-annealing enables complete activity regeneration due to formation of micropores.
Topics & Concepts
Degradation (telecommunications)Annealing (glass)CatalysisCarbon fibersOxygenRedoxChemical engineeringRegeneration (biology)ChemistryOxygen reduction reactionMaterials scienceInorganic chemistryMetallurgyOrganic chemistryComposite materialPhysical chemistryElectrodeElectrochemistryComputer scienceBiologyCell biologyEngineeringComposite numberTelecommunicationsElectrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysis and Hydrodesulfurization Studies