Molecular Catalysts Confined on and Within Molecular Layers Formed on a Si(111) Surface with Direct Si–C Bonds

Two examples of confined molecular catalysts are presented. PtCl42− 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 H2O before HER takes place. Ex situ and in situ XAFS measurements confirm that the Pt complexes accelerate HER without being converted into Pt particles. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.