Photocatalytic proton reduction with ruthenium and cobalt complexes immobilized on fumed reversed-phase silica.

ABSTRACT: Heterogeneous photocatalytic hydrogen production with a non-covalently immobilized molecular ruthenium based photosensitizer (PS) and a cobalt polypyridyl based water reducing catalyst (WRC) is reported. PS and WRC were derivatized with C₁₈-alkyl chains and immobilized by adsorption on hydrophobic fumed silica. The resulting loaded support was suspended in water with anionic or cationic surfactants and subjected to heterogeneous photocatalytic H₂ production with ascorbate as sacrificial electron donor (SED). No leaching was observed under catalytic conditions, thus catalysis was truly heterogeneous. The catalytic performance of immobilized PS and WRC clearly exceeded that of homogeneous catalysis at low concentrations. At high concentration, diffusion and light limita

SUBMITTER: Bachmann C 

PROVIDER: S-EPMC5952309 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature