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

Masuda, Takuya; Fukumitsu, Hitoshi; Takakusagi, Satoru; Chun, Wang-Jae; Kondo, Toshihiro; Asakura, Kiyotaka; Uosaki, Kohei · Adv Mater · 2012

basic_science · Level V

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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.

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