title: Molecular catalysts confined on and within molecular layers formed on a si(111) surface with direct si-C bonds.
abstract: Two examples of confined molecular catalysts are presented. PtCl(4)             (2-)  complexes are attached to a thiol-terminated monolayer by ligand exchange of Cl(-)  with a thiolate group and incorporated in a multilayer of viologen moieties by ion exchange. All Cl(-)  ligands are replaced by OH(-)  or H(2) O before HER takes place. Ex situ and in situ XAFS measurements confirm that the Pt complexes accelerate HER without being converted into Pt particles.
authors.affiliation: Global Research Center for Environment and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Masuda
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Fukumitsu
authors.forename: Satoru
authors.initials: S
authors.lastname: Takakusagi
authors.forename: Wang-Jae
authors.initials: WJ
authors.lastname: Chun
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Kondo
authors.forename: Kiyotaka
authors.initials: K
authors.lastname: Asakura
authors.forename: Kohei
authors.initials: K
authors.lastname: Uosaki
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D056831:Coordination Complexes / Q000737:chemistry; D004566:Electrodes; D056951:Photoelectron Spectroscopy; D010984:Platinum / Q000737:chemistry; D012666:Semiconductors; D012825:Silicon / Q000737:chemistry*; D013438:Sulfhydryl Compounds / Q000737:chemistry; D013499:Surface Properties
chemical_list: D056831:Coordination Complexes; D013438:Sulfhydryl Compounds; D010984:Platinum; D002244:Carbon; D012825:Silicon