title: Plasmon-Enhanced Photoelectrical Hydrogen Evolution on Monolayer MoS2Decorated Cu1.75S-Au Nanocrystals.
abstract: Hydrogen production from water splitting through an efficient photoelectrochemical route requires photoinduced electron transfer from light harvesters to efficient electrocatalysts. Here, the plasmon-enhanced photoelectrical nanocatalysts (NCs) have been successfully developed by coating a monolayer MoS2on the Cu1.75S-Au hetero-nanoparticle for hydrogen evolution reaction (HER). The plasmonic NCs dramatically improve the HER, leading to 29.5-fold increase of current under 650 nm excitation (1.0 W cm-2). These NCs generate an exceptionally high current density of 200 mA cm-2at overpotential of 182.8 mV with a Tafel slope of 39 mV per decade and excellent stability, which is better than or comparable to the Pt-free catalysts with carbon rod as counter electrode. The enhanced HER performance can be attributed to the significantly improved broad light absorption (400-3000 nm), more efficient charge separation and abundant active edge sites of monolayer MoS2. The studies may provide a facile strategy for the fabrication of efficient plasmon-enhanced photoelectrical NCs for HER.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
authors.forename: Jiabin
authors.initials: J
authors.lastname: Cui
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
authors.forename: Rui
authors.initials: R
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
authors.forename: Wenli
authors.initials: W
authors.lastname: Lu
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
authors.forename: Suying
authors.initials: S
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
authors.forename: Leyu
authors.initials: L
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D004220:Disulfides / Q000737:chemistry*; D004560:Electricity; D004563:Electrochemistry; D006046:Gold / Q000737:chemistry*; D006859:Hydrogen / Q000032:analysis*; D008027:Light; D008982:Molybdenum / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D012666:Semiconductors; D014867:Water / Q000737:chemistry
chemical_list: D004220:Disulfides; D014867:Water; D006046:Gold; D003300:Copper; D006859:Hydrogen; D008982:Molybdenum; C082964:molybdenum disulfide
keywords: MoS2; heteronanocrystals; hydrogen evolution reaction; photoelectrocatalysis; plasmon