On the behaviour of Au plasmonic nanoparticles during hydrogen evolution at p-Si

Brewster Angle Reflectometry (BAR) and spectral photocurrent analysis show that Au nanoparticles are in a resonant state during light-induced hydrogen evolution with unpolarized light near-normal incidence. Keggin-type phosphododecamolybdate (PMo 12O 40 3−) anions were used as reducing and stabilizi...

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Bibliographic Details
Published in:Electrochemistry communications 2010-10, Vol.12 (10), p.1298-1301
Main Authors: Lublow, M., Skorupska, K., Zoladek, S., Kulesza, P.J., Vo-Dinh, T., Lewerenz, H.J.
Format: Article
Language:English
Subjects:
Au nanoparticles
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Hydrogen evolution
Localized surface plasmons
Photoelectrocatalysis
Photoelectrochemistry. Electrochemiluminescence
Silicon
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Summary:Brewster Angle Reflectometry (BAR) and spectral photocurrent analysis show that Au nanoparticles are in a resonant state during light-induced hydrogen evolution with unpolarized light near-normal incidence. Keggin-type phosphododecamolybdate (PMo 12O 40 3−) anions were used as reducing and stabilizing agents to form novel Au nanoparticles (Au-NPs). BAR was employed to analyze the resonant optical response after adsorption to the surface of hydrogen terminated p-Si(111):H (1 × 1) and SiO 2. Proton reduction in 1 M H 2SO 4 occurs at asymmetric Au-NPs where also multipole field effects influence the plasmonic behaviour. In a comparative discussion, the contribution of surface plasmon polariton excitation to the observed pronounced photocurrent enhancement is outlined.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2010.07.004