The present work demonstrates hydrogen generation by nanowire-nanoparticle conjugate structures under visible radiation. The mechanism of hydrogen generation is attributed to photolytic cleavage of water. The nanostructures are synthesized by sol-gel and reduction chemistries and characterized by XRD, SEM, TEM, and optical spectroscopy. Photolysis is analyzed by gas chromatography. We discuss the possible mechanisms involved in the observed photolysis in terms of unique attributes of the multifunctional nanostructures, such as efficient channeling of photocarriers to redox reactions at the interfaces and self-alignment of energy levels leading to efficient charge transfer. We demonstrate conversion and quantum efficiencies of 10.6% and 22.5%, respectively, for the first hour of photolysis, under 470 nm excitation.
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ASME 2011 5th International Conference on Energy Sustainability
August 7–10, 2011
Washington, DC, USA
Conference Sponsors:
- Advanced Energy Systems Division and Solar Energy Division
ISBN:
978-0-7918-5468-6
PROCEEDINGS PAPER
Photolytic Nanostructures for Hydrogen Production Available to Purchase
Sean K. Maclaskey,
Sean K. Maclaskey
Oklahoma State University, Stillwater, OK
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Karthikeyan D. Ramachandriya,
Karthikeyan D. Ramachandriya
Oklahoma State University, Stillwater, OK
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C¸. O¨zge Topal,
C¸. O¨zge Topal
Oklahoma State University, Stillwater, OK
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Mark R. Wilkins,
Mark R. Wilkins
Oklahoma State University, Stillwater, OK
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Murat Yasar,
Murat Yasar
Techno-Sciences, Inc., Baltimore, MD
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A. Kaan Kalkan
A. Kaan Kalkan
Oklahoma State University, Stillwater, OK
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Sean K. Maclaskey
Oklahoma State University, Stillwater, OK
Karthikeyan D. Ramachandriya
Oklahoma State University, Stillwater, OK
C¸. O¨zge Topal
Oklahoma State University, Stillwater, OK
Mark R. Wilkins
Oklahoma State University, Stillwater, OK
Murat Yasar
Techno-Sciences, Inc., Baltimore, MD
A. Kaan Kalkan
Oklahoma State University, Stillwater, OK
Paper No:
ES2011-54530, pp. 1321-1326; 6 pages
Published Online:
March 13, 2012
Citation
Maclaskey, SK, Ramachandriya, KD, Topal, CO, Wilkins, MR, Yasar, M, & Kalkan, AK. "Photolytic Nanostructures for Hydrogen Production." Proceedings of the ASME 2011 5th International Conference on Energy Sustainability. ASME 2011 5th International Conference on Energy Sustainability, Parts A, B, and C. Washington, DC, USA. August 7–10, 2011. pp. 1321-1326. ASME. https://doi.org/10.1115/ES2011-54530
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