Molecular catalysts confined on and within molecular layers formed on a si(111) surface with direct si-C bonds

Takuya Masuda; Hitoshi Fukumitsu; Satoru Takakusagi; Wang-Jae Chun; Toshihiro Kondo; Kiyotaka Asakura; Kohei Uosaki

doi:10.1002/adma.201102491

Molecular catalysts confined on and within molecular layers formed on a si(111) surface with direct si-C bonds

Adv Mater. 2012 Jan 10;24(2):268-72. doi: 10.1002/adma.201102491. Epub 2011 Oct 4.

Authors

Takuya Masuda¹, Hitoshi Fukumitsu, Satoru Takakusagi, Wang-Jae Chun, Toshihiro Kondo, Kiyotaka Asakura, Kohei Uosaki

Affiliation

¹ Global Research Center for Environment and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan.

PMID: 21972009
DOI: 10.1002/adma.201102491

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.

MeSH terms

Carbon / chemistry*
Catalysis
Coordination Complexes / chemistry
Electrodes
Photoelectron Spectroscopy
Platinum / chemistry
Semiconductors
Silicon / chemistry*
Sulfhydryl Compounds / chemistry
Surface Properties

Substances

Coordination Complexes
Sulfhydryl Compounds
Platinum
Carbon
Silicon