Intracluster atomic and electronic structural heterogeneities in supported nanoscale metal catalysts
| Autor: | John J. Rehr, Annika Elsen, Anatoly I. Frenkel, Moniek Tromp, Yuanyuan Li, Ralph G. Nuzzo, Fernando D. Vila, Rowena Thomas, Ulrich Jung, Olga V. Safonova |
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| Přispěvatelé: | Homogeneous and Supramolecular Catalysis (HIMS, FNWI) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
In situ
Work (thermodynamics) Diffuse reflectance infrared fourier transform Chemistry Analytical chemistry Charge density Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Chemical physics Scanning transmission electron microscopy Metal catalyst Physical and Theoretical Chemistry Absorption (electromagnetic radiation) Nanoscopic scale |
| Zdroj: | The Journal of Physical Chemistry. C, 119(45), 25615-25627. American Chemical Society |
| ISSN: | 1932-7447 |
| DOI: | 10.1021/acs.jpcc.5b08267 |
| Popis: | This work reveals and quantifies the inherent intracluster heterogeneity in the atomic structure and charge distribution present in supported metal catalysts. The results demonstrate that these distributions are pronounced and strongly coupled to both structural and dynamic perturbations. They also serve to clarify the nature of the dynamic bonding of nanoscale catalytic metal clusters with their supports, and the mediation of these properties due to the presence of adsorbates. These findings are supported by theoretical modeling and experimental data measured for an exemplary supported metal catalyst, Pt supported on silica, using in situ high energy resolution X-ray absorption and emission spectroscopies; in situ diffuse reflectance infrared Fourier transform spectroscopy; and ex situ scanning transmission electron microscopy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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