title: Selective visible-light-driven CO2 reduction on a p-type dye-sensitized NiO photocathode.
abstract: We present a photocathode assembly for the visible-light-driven selective reduction of CO2 to CO at potentials below the thermodynamic equilibrium in the dark. The photoelectrode comprises a porous p-type semiconducting NiO electrode modified with the visible-light-responsive organic dye P1 and the reversible CO2 cycling enzyme carbon monoxide dehydrogenase. The direct electrochemistry of the enzymatic electrocatalyst on NiO shows that in the dark the electrocatalytic behavior is rectified toward CO oxidation, with the reactivity being governed by the carrier availability at the semiconductor-catalyst interface.
authors.affiliation: Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford , South Parks Road, Oxford OX1 3QR, Oxfordshire, United Kingdom.
authors.forename: Andreas
authors.initials: A
authors.lastname: Bachmeier
authors.forename: Samuel
authors.initials: S
authors.lastname: Hall
authors.forename: Stephen W
authors.initials: SW
authors.lastname: Ragsdale
authors.forename: Fraser A
authors.initials: FA
authors.lastname: Armstrong
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D002248:Carbon Monoxide / Q000138:chemical synthesis* / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry*; D004566:Electrodes; D008027:Light; D008958:Models, Molecular; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D055668:Photochemical Processes
chemical_list: D004396:Coloring Agents; D002245:Carbon Dioxide; D009532:Nickel; D002248:Carbon Monoxide; C028007:nickel monoxide