In situ STM study of zinc electrodeposition on Au(111) from the ionic liquid 1-ethyl-3-methylimidazolium trifluoromethylsulfonate |
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| Authors: | Zhen Liu Natialia Borisenko Sherif Zein El Abedin Frank Endres |
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| Institution: | 1. Institute of Electrochemistry, Clausthal University of Technology, Arnold-Sommerfeld-Strasse 6, 38678, Clausthal-Zellerfeld, Germany
2. Electrochemistry and Corrosion Laboratory, National Research Centre, Dokki, Cairo, Egypt
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| Abstract: | The electrodeposition of Zn on Au(111) was investigated with cyclic voltammetry (CV) and in situ scanning tunneling microscopy (STM) in the air and water stable ionic liquid 1-ethyl-3-methylimidazolium trifluoromethylsulfonate (EMIm]TfO) with a Zn(TfO)2 concentration of 0.2 M. It has been found that the structure EMIm]TfO/Au(111) is very complex. Furthermore, the addition of Zn(TfO)2 changes the interfacial structure significantly. The first STM-probed Zn islands appear at +0.3 V, and their growth leads to the formation of a thin zinc layer. A bulk deposition of Zn is obtained with in situ STM at ?0.1 V. Furthermore, in situ STM reveals that the deposition of Zn is accompanied by the formation of Au-Zn surface alloys. |
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