Interface engineering of hierarchical NiCoP/NiCoS<sub><i>x</i></sub> heterostructure arrays for efficient alkaline hydrogen evolution at large current density
Weiwei Han, Fan Zhang, Lingshu Qiu, Yang Qian, Shaoyun Hao, Ping Li, Yi He, Xingwang Zhang
Abstract
in 1 M KOH, along with good stability for more than 110 h, outperforming most of the reported non-noble metal based HER catalysts. Density functional theory (DFT) results further confirm that this bimetal phosphide/sulfide heterostructure can synergistically optimize the Gibbs free energy of H* during the HER process, thus accelerating the HER reaction kinetics. This work provides a new strategy toward the rational design of large-current-density electrocatalysts, which have great potential in practical large-scale hydrogen production.
Topics & Concepts
Interface (matter)HeterojunctionMaterials scienceCurrent densityHydrogenCurrent (fluid)Engineering physicsOptoelectronicsNanotechnologyChemical engineeringChemistryElectrical engineeringEngineeringPhysicsComposite materialCapillary numberOrganic chemistryQuantum mechanicsCapillary actionElectrocatalysts for Energy ConversionAdvanced battery technologies researchAdvanced Photocatalysis Techniques