Gold Nanoclusters Grown on MoS2 Nanosheets by Pulsed Laser Deposition: An Enhanced Hydrogen Evolution Reaction
Yuting Jing, Ruijing Wang, Qiang Wang, Xuefeng Wang
Abstract
Au nanoparticles were decorated on a 2H MoS2 surface to form an Au/MoS2 composite by pulse laser deposition. Improved HER activity of Au/MoS2 is evidenced by a positively shifted overpotential (−77 mV) at a current density of −10 mA cm−2 compared with pure MoS2 nanosheets. Experimental evidence shows that the interface between Au and MoS2 provides more sites to combine protons to form an active H atom. The density functional theory calculations found that new Au active sites on the Au and MoS2 interface with improved conductivity of the whole system are essential for enhancing HER activity of Au/MoS2.
Topics & Concepts
NanoclustersOverpotentialMaterials scienceDensity functional theoryDeposition (geology)Pulsed laser depositionAtom (system on chip)ConductivityHydrogenChemical engineeringNanoparticleNanotechnologyElectrochemistryPhysical chemistryThin filmChemistryComputational chemistryElectrodePaleontologyEngineeringEmbedded systemBiologyOrganic chemistrySedimentComputer scienceElectrocatalysts for Energy ConversionChalcogenide Semiconductor Thin FilmsMachine Learning in Materials Science