In situ structural evolution of single particle model catalysts under ambient pressure reaction conditions
| Autor: | M. W. G. M. (Tiny) Verhoeven, Emiel J. M. Hensen, Jerome Carnis, Marie-Ingrid Richard, S. Fernandez, Lu Gao, Tobias U. Schülli, Arno J. F. van Hoof, Gilbert A. Chahine, Olivier P. Thomas, Jan P. Hofmann, Stéphane Labat |
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| Přispěvatelé: | Inorganic Materials & Catalysis |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Diffraction
In situ Materials science Strain (chemistry) 02 engineering and technology Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Redox 0104 chemical sciences Catalysis Metal Chemical engineering visual_art visual_art.visual_art_medium General Materials Science 0210 nano-technology Ambient pressure |
| Zdroj: | Nanoscale, 11(1), 331-338. Royal Society of Chemistry |
| ISSN: | 2040-3372 2040-3364 |
| Popis: | The catalytic activity of metal nanoparticles can be altered by applying strain, which changes the crystalline lattice spacing and modifies the electronic properties of the metal. Understanding the role of elastic strain during catalytic reactions is thus crucial for catalyst design. Here, we show how single highly faceted Pt nanoparticles expand or contract upon interaction with different gas atmospheres using in situ nano-focused coherent X-ray diffraction imaging. We also demonstrate inter-particle heterogeneities, as they differ in development of strain under CO oxidation reaction conditions. The reported observations offer new insights into the design of catalysts exploiting strain effects. |
| Databáze: | OpenAIRE |
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