Highly Efficient Photoelectrochemical Alkene Epoxidation on a Dye-Sensitized Photoanode.

In photoelectrochemical (PEC) cells, selective oxidation of organic substrates coupled with hydrogen evolution represents a promising approach for value-added chemical production and solar energy conversion. In this study, we report on PEC epoxidation of alkenes at a ruthenium dye-sensitized photoanode in a CHCN/HO mixed solvent with LiBr as a mediator and water as the oxygen source. The dye-sensitized photoanode was found to exhibit significant advantages in the simultaneous improvement of charge separation and suppression of charge recombination.

Aqueous CO Reduction on Si Photocathodes Functionalized by Cobalt Molecular Catalysts/Carbon Nanotubes.

Photoelectrochemical reduction of CO is a promising approach for renewable fuel production. We herein report a novel strategy for preparation of hybrid photocathodes by immobilizing molecular cobalt catalysts on TiO -protected n -p Si electrodes (Si|TiO ) coated with multiwalled carbon nanotubes (CNTs) by π-π stacking. Upon loading a composite of Co (BrqPy) (BrqPy=4',4''-bis(4-bromophenyl)-2,2' : 6',2'' : 6'',2'''-quaterpyridine) catalyst and CNT on Si|TiO , a stable 1-Sun photocurrent density of -1.