High-speed in situ surface X-ray diffraction studies of the electrochemical dissolution of Au(001).

J Am Chem Soc

Institut für Experimentelle und Angewandte Physik, Universität Kiel, Leibnizstrasse 19, 24098 Kiel, Germany.

Published: March 2011

We present in situ X-ray surface diffraction studies of interface processes with data acquisition rates in the millisecond regime, using the electrochemical dissolution of Au(001) in Cl-containing solution as an example. This progress in time resolution permits monitoring of atomic-scale growth and etching processes at solid-liquid interfaces at technologically relevant rates. Au etching was found to proceed via a layer-by-layer mechanism in the entire active dissolution regime up to rates of ∼20 ML/s. Furthermore, we demonstrate that information on the lateral surface morphology and in-plane lattice strain during the electrochemical process can be obtained.

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http://dx.doi.org/10.1021/ja1115748DOI Listing

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