Hydride formation thermodynamics and hysteresis in individual Pd nanocrystals with different size and shape

Syrenova, Svetlana,1987Chalmers tekniska högskola,Chalmers University of Technology (författare)

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.

Wadell, Carl,1985Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)caraxe (författare)
Nugroho, Ferry,1986Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ferryn (författare)
Gschneidtner, Tina,1985Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)tinag (författare)
Fernandez, Yuri A. Diaz,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)yuria (författare)
Nalin, Giammarco,1988Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)gnalin (författare)
Świtlik, DominikaUniwersytet Warszawski,University of Warsaw (författare)
Westerlund, Fredrik,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)fredrikw (författare)
Antosiewicz, Tomasz,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)tomasza (författare)
Zhdanov, Vladimir,1952Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)zhdanov (författare)
Moth-Poulsen, Kasper,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mkasper (författare)
Langhammer, Christoph,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)clangham (författare)
Chalmers tekniska högskolaUniwersytet Warszawski (creator_code:org_t)

Av författaren/redakt...: Syrenova, Svetla ...; Wadell, Carl, 19 ...; Nugroho, Ferry, ...; Gschneidtner, Ti ...; Fernandez, Yuri ...; Nalin, Giammarco ...; visa fler...; Świtlik, Dominik ...; Westerlund, Fred ...; Antosiewicz, Tom ...; Zhdanov, Vladimi ...; Moth-Poulsen, Ka ...; Langhammer, Chri ...; visa färre...

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