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Correlating Carrier Dynamics and Photocatalytic Hydrogen Generation in Pt Decorated CdSe Tetrapods as a Function of Cocatalyst Size
Cited 15 time in
Web of Science
Cited 15 time in Scopus
- Authors
- Issue Date
- 2017-06
- Publisher
- American Chemical Society
- Citation
- Journal of Physical Chemistry C, Vol.121 No.24, pp.13070-13077
- Abstract
- We investigate photoinduced carrier dynamics by time resolved terahertz spectroscopy (TRTS) in Pt nanoparticle decorated CdSe tetrapods as a function of Pt nanoparticles size (and identical areal density). We find that the collection efficiency of electrons photo generated in the tetrapods by the Pt particle increases as a function of Pt nanoparticle size. However, the photocatalytic H-2 generation efficiency is reduced for tetrapods decorated with larger Pt particles. Our results demonstrate a competition between electron capture efficiency at the semiconducting/metal interface, increasing with nanoparticles size, and electron release efficiency at the metal/water interface, decreasing with nanoparticles size. This trade-off defines an optimum for photocatalytic H-2 generation in Pt cocatalyst decorated CdSe tetrapods as a function of Pt size.
- ISSN
- 1932-7447
- Language
- English
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