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Photoreduction Kinetics of Sodium Tetrachloroaurate under Synchrotron Soft X-ray Exposure

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Authors
Fong, Y.
Visser, B.
Gascooke, J.
Cowie, B.
Thomsen, L.
Metha, G.
Buntine, Mark
Harris, H.
Date
2011
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Type
Journal Article
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Abstract

We report on the time evolution of the sodium tetrachloroaurate (NaAuCl4) chemical properties as a function of soft X-ray exposure in a dried sample on a silicon surface using X-ray photoelectron spectroscopy (XPS). Our investigations provide mechanistic insight into the photoreduction kinetics from AuIII to AuI and then AuI to Au0. We unambiguously show that XPS photoreduction occurs in stepwise fashion via the AuI state. Both photoreduction steps undergo first-order kinetics.

Citation
Fong, Yuen-Yan and Visser, Bradley R. and Gascooke, Jason R. and Cowie, Bruce C.C. and Thomsen, Lars and Metha, Gregory F. and Buntine, Mark A. and Harris, Hugh H. 2011. Photoreduction Kinetics of Sodium Tetrachloroaurate under Synchrotron Soft X-ray Exposure. Langmuir. 27 (13): pp. 8099-8104.
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Langmuir
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DOI
Department
Department of Applied Chemistry
Remarks

The website for the Langmuir journal is available at: http://pubs.acs.org/Langmuir