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Solar-Powered Production of Molecular Hydrogen from Water

Park, Hyunwoong and Vecitis, Chad D. and Choi, Wonyong and Weres, Oleh and Hoffmann, M. R. (2008) Solar-Powered Production of Molecular Hydrogen from Water. Journal of Physical Chemistry C, 112 (4). pp. 885-889. ISSN 1932-7447.

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Electrochemical water splitting powered by conventional electricity or photovoltaic arrays produces molecular hydrogen at the cathode, while organic compound oxidation under mild conditions takes place at the anode in competition with the production of oxygen. An electrolytic cell, which is based on the coupling of bismuth-doped titanium dioxide anodes (BiO_x−TiO_2) with stainless steel (SS) cathodes, is characterized in terms of hydrogen production efficiency and organic compound degradation. In the solar-powered photovoltaic (PV)−electrochemical system, the production of molecular oxygen at the anode is suppressed by the simultaneous oxidation and mineralization of organic compounds dissolved in water. In addition, the anodic oxidation of organic substrates has a synergistic effect on hydrogen production at the cathode that results in a 53% increase in the energy efficiency for H_2 generation at circum-neutral pH in the presence of dilute electrolyte solutions.

Item Type:Article
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URLURL TypeDescription Information
Park, Hyunwoong0000-0002-4938-6907
Hoffmann, M. R.0000-0001-6495-1946
Additional Information:© 2008 American Chemical Society. Received: November 8, 2007; In Final Form: December 13, 2007. Publication Date (Web): January 4, 2008. We appreciate the support provided by the Daegu Gyeongbuk Institute of Science and Technology (DGIST) of Daegu, South Korea. W.C. is also grateful to the Yonam Foundation in support of his sabbatical leave at Caltech.
Funding AgencyGrant Number
Daegu Gyeongbuk Institute of Science and Technology (DGIST)UNSPECIFIED
Yonam FoundationUNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20150806-062658567
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Official Citation:Solar-Powered Production of Molecular Hydrogen from Water Hyunwoong Park, Chad D. Vecitis, Wonyong Choi, Oleh Weres, and Michael R. Hoffmann The Journal of Physical Chemistry C 2008 112 (4), 885-889 DOI: 10.1021/jp710723p
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59252
Deposited By: Ruth Sustaita
Deposited On:06 Aug 2015 16:40
Last Modified:09 Mar 2020 13:19

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