Light-induced water oxidation at silicon electrodes functionalized with a cobalt oxygen-evolving catalyst
Author(s)Pijpers, Joep J. H.; Winkler, Mark Thomas; Surendranath, Yogesh; Buonassisi, Tonio; Nocera, Daniel G.
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Integrating a silicon solar cell with a recently developed cobalt-based water-splitting catalyst (Co-Pi) yields a robust, monolithic, photo-assisted anode for the solar fuels process of water splitting to O2 at neutral pH. Deposition of the Co-Pi catalyst on the Indium Tin Oxide (ITO)-passivated p-side of a np-Si junction enables the majority of the voltage generated by the solar cell to be utilized for driving the water-splitting reaction. Operation under neutral pH conditions fosters enhanced stability of the anode as compared to operation under alkaline conditions (pH 14) for which long-term stability is much more problematic. This demonstration of a simple, robust construct for photo-assisted water splitting is an important step towards the development of inexpensive direct solar-to-fuel energy conversion technologies.
DepartmentMassachusetts Institute of Technology. Department of Chemistry; Massachusetts Institute of Technology. Department of Mechanical Engineering; Massachusetts Institute of Technology. Laboratory for Manufacturing and Productivity
Proceedings of the National Academy of Sciences of the United States of America
National Academy of Sciences (U.S.)
Pijpers, J. J. H. et al. “Light-induced Water Oxidation at Silicon Electrodes Functionalized with a Cobalt Oxygen-evolving Catalyst.” Proceedings of the National Academy of Sciences 108.25 (2011): 10056–10061. Web.
Final published version