The Evolution of the Cytochrome c6 Family of Photosynthetic Electron Transfer Proteins.

During photosynthesis, electrons are transferred between the cytochrome b6f complex and photosystem I. This is carried out by the protein plastocyanin in plant chloroplasts, or by either plastocyanin or cytochrome c6 in many cyanobacteria and eukaryotic algal species. There are three further cytochrome c6 homologs: cytochrome c6A in plants and green algae, and cytochromes c6B and c6C in cyanobacteria.

Solar Water Splitting with a Hydrogenase Integrated in Photoelectrochemical Tandem Cells.

Hydrogenases (H ases) are benchmark electrocatalysts for H production, both in biology and (photo)catalysis in vitro. We report the tailoring of a p-type Si photocathode for optimal loading and wiring of H ase through the introduction of a hierarchical inverse opal (IO) TiO interlayer. This proton-reducing Si|IO-TiO |H ase photocathode is capable of driving overall water splitting in combination with a photoanode.