Solar-Powered Electrochemical Oxidation of Organic Compounds Coupled with the Cathodic Production of Molecular Hydrogen
Abstract
A Bi-doped TiO_2 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.
Additional Information
© 2008 American Chemical Society. Received: April 1, 2008; Revised Manuscript ReceiVed: May 16, 2008. Published on Web 07/26/2008. Research was supported by the Daegu Gyeongbuk Institute of Science and Technology (DGIST), the KOSEF Nano R&D program (Grant No. 2005-02234), and the Hydrogen Energy Research & Development Center and 21st Century Frontier Research and Development Program of the Ministry of Science and Technology of Korea.Additional details
- Eprint ID
- 59248
- DOI
- 10.1021/jp802807e
- Resolver ID
- CaltechAUTHORS:20150805-150523374
- Daegu Gyeongbuk Institute of Science and Technology (DGIST)
- Korea Science and Engineering Foundation (KOSEF)
- 2005-02234
- Ministry of Science and Technology (Korea)
- Created
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2015-08-05Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field