Z-scheme solar water splitting via self-assembly of photosystem I-catalyst hybrids in thylakoid membranes.

ABSTRACT: Nature's solar energy converters, the Photosystem I (PSI) and Photosystem II (PSII) reaction center proteins, flawlessly manage photon capture and conversion processes in plants, algae, and cyanobacteria to drive oxygenic water-splitting and carbon fixation. Herein, we utilize the native photosynthetic Z-scheme electron transport chain to drive hydrogen production from thylakoid membranes by directional electron transport to abiotic catalysts bound at the stromal end of PSI. Pt-nanoparticles readily self-assemble with PSI in spinach and cyanobacterial membranes as evidenced by light-driven H₂ production in the presence of a mediating electron shuttle protein and the sacrificial electron donor sodium ascorbate. EPR characterization confirms placement of the Pt-nanoparticles on th

SUBMITTER: Utschig LM 

PROVIDER: S-EPMC6256728 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature