MOF-derived hierarchical 3D bi-doped CoP nanoflower eletrocatalyst for hydrogen evolution reaction in both acidic and alkaline media
Lei Guo, Xue Bai, Hui Xue, Jing Sun, Tianshan Song, Shuai Zhang, Ling Qin, Keke Huang, Feng He, Qin Wang
Abstract
A 3D hierarchical Bi-doped CoP nanoflower electrocatalyst has been developed based on a MOF self-sacrifice strategy. 3% Bi/CoP delivers a current density of 10 mA cm-2 at low overpotentials of 122 mV in alkaline electrolyte and 150 mV in acidic electrolyte, respectively. DFT calculations demonstrate that Bi doping can synergistically optimize the binding free energy of H* on the CoP (202) facet and ultimately improve the HER performance.
Topics & Concepts
NanoflowerElectrolyteDopingElectrocatalystDensity functional theoryMaterials scienceChemical engineeringChemistryNanotechnologyElectrochemistryPhysical chemistryElectrodeComputational chemistryOptoelectronicsNanostructureEngineeringElectrocatalysts for Energy ConversionAdvanced battery technologies researchFuel Cells and Related Materials