title: Solar-powered electrochemical oxidation of organic compounds coupled with the cathodic production of molecular hydrogen.
abstract: A Bi-doped TiO2 anode, which is prepared from a mixed metal oxide coating deposited on Ti metal, is shown to be efficient for conventional water splitting. In this hybrid photovoltaic-electrochemical system, a photovoltaic (PV) cell is used to convert solar light to electricity, which is then used to oxidize a series of phenolic compounds at the semiconductor anode to carbon dioxide with the simultaneous production of molecular hydrogen from water/proton reduction at the stainless steel cathode. Degradation of phenol in the presence of a background NaCl electrolyte produces chlorinated phenols as reaction intermediates, which are subsequently oxidized completely to carbon dioxide and low-molecular weight carboxylic acids. The anodic current efficiency for the complete oxidation of phenolic compounds ranges from 3% to 17%, while the cathodic current efficiency and the energy efficiency for hydrogen gas generation range from 68% to 95% and 30% to 70%, respectively.
authors.affiliation: W. M. Keck Laboratories, California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: Hyunwoong
authors.initials: H
authors.lastname: Park
authors.forename: Chad D
authors.initials: CD
authors.lastname: Vecitis
authors.forename: Michael R
authors.initials: MR
authors.lastname: Hoffmann