Syrenova, Svetlana, Wadell, Carl, Nugroho, Ferry AA, Gschneidtner, Tina A, Fernandez, Yuri A Diaz, Nalin, Giammarco, Switlik, Dominika, Westerlund, Fredrik, Antosiewicz, Tomasz J, Zhdanov, Vladimir P et al (show 2 more authors)
(2015)
Hydride formation thermodynamics and hysteresis in individual Pd nanocrystals with different size and shape.
NATURE MATERIALS, 14 (12).
pp. 1236-1244.
ISSN 1476-1122, 1476-4660
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Hydride formation thermodynamics and hysteresis in individual Pd nanocrystals with.pdf - Author Accepted Manuscript Download (815kB) | Preview |
Abstract
Physicochemical properties of nanoparticles may depend on their size and shape and are traditionally assessed in ensemble-level experiments, which accordingly may be plagued by averaging effects. These effects can be eliminated in single-nanoparticle experiments. Using plasmonic nanospectroscopy, we present a comprehensive study of hydride formation thermodynamics in individual Pd nanocrystals of different size and shape, and find corresponding enthalpies and entropies to be nearly size- and shape-independent. The hysteresis observed is significantly wider than in bulk, with details depending on the specifics of individual nanoparticles. Generally, the absorption branch of the hysteresis loop is size-dependent in the sub-30 nm regime, whereas desorption is size- and shape-independent. The former is consistent with a coherent phase transition during hydride formation, influenced kinetically by the specifics of nucleation, whereas the latter implies that hydride decomposition either occurs incoherently or via different kinetic pathways.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Hydrogen, Palladium, Spectrum Analysis, Kinetics, Thermodynamics, Nanoparticles |
| Subjects: | ?? QC ?? ?? QD ?? |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 08 Sep 2015 08:14 |
| Last Modified: | 07 Dec 2024 14:10 |
| DOI: | 10.1038/NMAT4409 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/2024759 |
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