Hydride formation thermodynamics and hysteresis in individual Pd nanocrystals with different size and shape
Journal article, 2015

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.

Author

Svetlana Syrenova

Chalmers, Applied Physics, Chemical Physics

Carl Wadell

Chalmers, Applied Physics, Chemical Physics

Ferry Nugroho

Chalmers, Applied Physics, Chemical Physics

Tina Gschneidtner

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Yuri A. Diaz Fernandez

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Giammarco Nalin

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Dominika Świtlik

University of Warsaw

Fredrik Westerlund

Chalmers, Biology and Biological Engineering, Chemical Biology

Tomasz Antosiewicz

Chalmers, Applied Physics, Bionanophotonics

Vladimir Zhdanov

Chalmers, Applied Physics, Chemical Physics

Kasper Moth-Poulsen

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Christoph Langhammer

Chalmers, Applied Physics, Chemical Physics

Nature Materials

1476-1122 (ISSN) 1476-4660 (eISSN)

Vol. 14 12 1236-1244

Single Molecule Nano Electronics (SIMONE)

European Commission (FP7), 2014-02-01 -- 2019-01-31.

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Materials Science

Subject Categories

Nano Technology

DOI

10.1038/NMAT4409

PubMed

26343912

More information

Latest update

10/15/2018