title: Inorganic core-shell assemblies for closing the artificial photosynthetic cycle.
abstract: Co oxide (Co(3)O(4)) nanotubes are shown to act as an efficient water oxidation catalyst when driven with a visible light sensitizer (pH 7). The nanotubes form the core of a Co(3)O(4)-SiO(2) core-shell nanotube design for separating the carbon dioxide photoreduction from the oxygen evolution reaction. Amorphous dense phase silica of a few nanometers depth is shown to conduct protons while blocking molecular oxygen. Organic molecular wires embedded in the silica shell provide controlled charge transport between the light absorber on one side and the Co(3)O(4) catalyst on the other side. Hence, the silica shell is suitable as a membrane of an assembly for closing the photosynthetic cycle on the nanometer scale under product separation.
authors.affiliation: Physical Biosciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA. HMFrei@lbl.gov.
authors.forename: Guangbi
authors.initials: G
authors.lastname: Yuan
authors.forename: Anil
authors.initials: A
authors.lastname: Agiral
authors.forename: Norman
authors.initials: N
authors.lastname: Pellet
authors.forename: Wooyul
authors.initials: W
authors.lastname: Kim
authors.forename: Heinz
authors.initials: H
authors.lastname: Frei