Hydrophilic Interaction Between Low-Coordinated Au and Water: H2O/Au(310) Studied with TPD and XPS
| Autor: | Christine Hahn, Maarten E. van Reijzen, Kees-Jan Weststrate, Ludo B. F. Juurlink, Angela den Dunnen, Matthijs A. van Spronsen |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry
02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Dissociation (chemistry) 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Crystallography General Energy Adsorption X-ray photoelectron spectroscopy law Desorption Monolayer Physical and Theoretical Chemistry Crystallization 0210 nano-technology Anisotropy Adsorption energy |
| Zdroj: | The Journal of Physical Chemistry C. 120:8693-8703 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.6b00912 |
| Popis: | In this work, we study the relatively weak H2O–Au interaction on the highly stepped and anisotropic (310) surface with temperature-programmed desorption and X-ray photoelectron spectroscopy. Compared to Au(111), we report an enhanced adsorption energy of H2O–Au(310) as observed from the (sub)monolayer desorption peak. This peak shows zero-order desorption kinetics, which we do not explain with a typical two-phase coexistence model but rather by desorption from the ends of one-dimensional structures. These could cover both the steps and (part of) the terraces. We do not observe crystallization of ice clusters as observed on Au(111). This leads to the conclusion that this stepped surface forms a hydrophilic template for H2O adsorption. We also notice that the precise orientation of the steps determines the H2O binding strength. Despite the surface’s enhanced H2O interaction, we do not observe any significant H2O dissociation. This indicates that the presence of low-coordinated Au atoms is not enough to expl... |
| Databáze: | OpenAIRE |
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