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Penschke C, Thomas J, Bertram C, Michaelides A, Morgenstern K, Saalfrank P, Bovensiepen U. Hydration at Highly Crowded Interfaces. PHYSICAL REVIEW LETTERS 2023; 130:106202. [PMID: 36962030 DOI: 10.1103/physrevlett.130.106202] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 10/08/2022] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
Understanding the molecular and electronic structure of solvated ions at surfaces requires an analysis of the interactions between the surface, the ions, and the solvent environment on equal footing. Here, we tackle this challenge by exploring the initial stages of Cs^{+} hydration on a Cu(111) surface by combining experiment and theory. Remarkably, we observe "inside-out" solvation of Cs^{+} ions, i.e., their preferential location at the perimeter of the water clusters on the metal surface. In addition, water-Cs complexes containing multiple Cs^{+} ions are observed to form at these surfaces. Established models based on maximum ion-water coordination and conventional solvation models cannot account for this situation, and the complex interplay of microscopic interactions is the key to a fundamental understanding.
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Affiliation(s)
- Christopher Penschke
- Department of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam-Golm, Germany
| | - John Thomas
- Faculty of Physics and Center for Nanointegration (CENIDE), University of Duisburg-Essen, D-47048 Duisburg, Germany
| | - Cord Bertram
- Faculty of Physics and Center for Nanointegration (CENIDE), University of Duisburg-Essen, D-47048 Duisburg, Germany
- Department of Chemistry and Biochemistry, Ruhr-Universität Bochum, Universitätsstraße 150, D-44801 Bochum, Germany
| | - Angelos Michaelides
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Karina Morgenstern
- Department of Chemistry and Biochemistry, Ruhr-Universität Bochum, Universitätsstraße 150, D-44801 Bochum, Germany
| | - Peter Saalfrank
- Department of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam-Golm, Germany
- Department of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam-Golm, Germany
| | - Uwe Bovensiepen
- Faculty of Physics and Center for Nanointegration (CENIDE), University of Duisburg-Essen, D-47048 Duisburg, Germany
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Melander MM. Frozen or dynamic? — An atomistic simulation perspective on the timescales of electrochemical reactions. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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Schmickler W, Santos E. Desorption of hydrogen from graphene induced by charge injection. ChemElectroChem 2022. [DOI: 10.1002/celc.202200511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Elizabeth Santos
- Ulm University: Universitat Ulm Instiitute of Theoretical Chemistry Albert Einstein Allee 11 89089 Ulm GERMANY
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