Enhancing the reactivity of gold: Nanostructured Au(111) adsorbs CO
| Autor: | Friedrich M. Hoffmann, Joon B. Park, Jan Hrbek, Sanjaya D. Senanayake, Dario Stacchiola, José A. Rodriguez, Shuguo Ma |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry
Inorganic chemistry Nanoparticle 02 engineering and technology Surfaces and Interfaces engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences XANES 0104 chemical sciences Surfaces Coatings and Films Characterization (materials science) Catalysis Chemical engineering Materials Chemistry engineering Reactivity (chemistry) Noble metal 0210 nano-technology Spectroscopy Vicinal |
| Zdroj: | Surface Science. 650:17-23 |
| ISSN: | 0039-6028 |
| Popis: | Low-coordinated sites are surface defects whose presence can transform a surface of inert or noble metal such as Au into an active catalyst. Starting with a well-ordered Au(111) surface we prepared by ion sputtering gold surfaces modified by pits, used microscopy (STM) for their structural characterization and CO spectroscopy (IRAS and NEXAFS) for probing reactivity of surface defects. In contrast to the Au(111) surface CO adsorbs readily on the pitted surfaces bonding to low-coordinated sites identified as step atoms forming {111} and {100} microfacets. Pitted nanostructured surfaces can serve as interesting and easily prepared models of catalytic surfaces with defined defects that offer an attractive alternative to vicinal surfaces or nanoparticles commonly employed in catalysis science. |
| Databáze: | OpenAIRE |
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