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Structures of Adsorbed Halide Anions on a Copper Electrode Studied by in Situ Scanning Tunneling Microscopy
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hải, Phan Thanh |
| Copyright Year | 2012 |
| Abstract | The structures of adsorbed halide monolayers, e.g. chloride, iodide, on a Cu(100) electrode have been investigated by a combination of cyclic voltammetry (CV) and electrochemical scanning tunneling microscopy (EC-STM). The potential range of the copper electrode in electrolytes is limited by two chemical reactions, (i) the oxidative copper dissolution reaction (CDR) at the anodic limit and (ii) the reductive hydrogen evolution reaction (HER) at the cathodic limit. While a featureless CV curve is characteristic for this electrode surface in pure hydrochloric acid, drastic changes in the CV curves are observed in the iodide containing solutions, indicating the formation of a two-dimensional CuI film. While chloride anions form a simple c(2×2) structure on the Cu(100) electrode, an electrocompressible c(p× 2) structure of adsorbed iodide is found, which at anodic potentials at the onset of copper dissolution transforms into the two-dimensional CuI compound. Based on these informations structure models are proposed for the various adsorbate layers which could serve as input in theoretical simulations. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.iop.vast.ac.vn/theor/conferences/nctp/proc/36/239-247.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
