One-step synthesis of IrO<sub>x</sub>-decorated ultrathin NiFe LDH nanosheets for efficient oxygen evolution reaction
Depei Liu, Yu Du, Taozhu Li, Hehe Zhang, Duanduan Liu, Weining Zhang, Huang Tang, Yanghui Hou, Jingsha Li, Shicheng Yan, Tao Yu, Zhigang Zou
Abstract
The oxygen evolution reaction (OER) is a vital proton donor for various clean energy technologies. Here, we synthesized IrOx-decorated ultrathin NiFe-LDH nanosheets (thickness 1-2 nm) by a one-step co-precipitation method. The IrOx was uniformly dispersed on the surface of ultrathin NiFe-LDH nanosheets, greatly increasing the active sites and the electric conductivity for NiFe-LDH. As a result, the IrOx/U-NiFe-LDH exhibited excellent OER performance with a low overpotential (236 mV) and a Tafel slope (74.3 mA dec-1).
Topics & Concepts
Tafel equationOverpotentialOxygen evolutionMaterials scienceChemical engineeringOxygenConductivityNanotechnologyInorganic chemistryChemistryElectrodeElectrochemistryPhysical chemistryOrganic chemistryEngineeringLayered Double Hydroxides Synthesis and ApplicationsAdvanced Photocatalysis TechniquesElectrocatalysts for Energy Conversion