Electronic structure modulation of nickel–iron layered double hydroxide <i>via</i> vanadium doping for enhanced oxygen evolution reaction performance
Fang Xiang-hong, Ruikun Zhang, Zeng Xiaoyi, Xiang Xian-bing, Wu Huabing
Abstract
V 4+ /V 5+ doping optimizes the Ni/Fe d-band center in NiFe-LDH, weakening OH adsorption for superior OER. This yields a record-low overpotential of 254 mV and Tafel slope of 41.21 mV dec −1 , alongside a 40.8% lower R ct and 33% higher E CSA .
Topics & Concepts
Tafel equationOverpotentialOxygen evolutionMaterials scienceChronoamperometryNanosheetDopingVanadiumElectrochemistryChemical engineeringConductivityVanadium nitrideHydroxideElectronic structureHeteroatomZigzagNanotechnologyElectrical resistivity and conductivityInorganic chemistryCobalt hydroxideWater splittingElectrodeMetalChemical physicsElectrocatalystElectrocatalysts for Energy ConversionLayered Double Hydroxides Synthesis and ApplicationsSupercapacitor Materials and Fabrication