Preferential Co substitution on Ni sites in Ni–Fe oxide arrays enabling large-current-density alkaline oxygen evolution
Yuping Lin, Xiaoming Fan, Mengqiu Huang, Zeheng Yang, Weixin Zhang
Abstract
Co–NiO/Fe 2 O 3 nanosheets featuring Co substitution on Ni sites can effectively regulate electronic structures and exhibit high OER activities with low overpotential ( η 500 = 230 mV), small Tafel slope (33.9 mV dec −1 ) and superb durability for 300 h.
Topics & Concepts
OverpotentialNanosheetTafel equationOxygen evolutionNon-blocking I/OMaterials scienceOxideElectrocatalystCobalt oxideChemical engineeringWater splittingCobaltInorganic chemistryNanotechnologyCatalysisElectrochemistryChemistryPhysical chemistryMetallurgyElectrodeEngineeringPhotocatalysisBiochemistryElectrocatalysts for Energy ConversionElectrochemical Analysis and ApplicationsAdvanced battery technologies research