Thermodynamics of hydride formation and decomposition in supported sub-10 nm Pd nanoparticles of different sizes
Journal article, 2014

Hydrogen storage properties of supported Pd nanoparticles with average sizes in the range 2.7-7.6 nm were studied using indirect nanoplasmonic sensing. For each particle size, a series of isotherms was measured and, through Van't Hoff analysis, the changes in enthalpy upon hydride formation/decomposition were determined. Contrary to the expected decrease of the enthalpy, due to increasing importance of surface tension in smaller particles, we observe a very weak size dependence in the size range under consideration. We attribute this to a compensation effect due to an increased fraction of hydrogen atoms occupying energetically favorable subsurface sites in smaller nanoparticles.

Palladium

isotherms

plasmonic sensing

thermodynamics

hydrogen storage

subsurface hydrogen

Author

Carl Wadell

Chalmers, Applied Physics, Chemical Physics

Torben Pingel

Chalmers, Applied Physics, Eva Olsson Group

Vladimir Zhdanov

Chalmers, Applied Physics, Chemical Physics

Igor Zoric

Chalmers, Applied Physics, Chemical Physics

Christoph Langhammer

Chalmers, Applied Physics, Chemical Physics

Eva Olsson

Chalmers, Applied Physics, Eva Olsson Group

Chemical Physics Letters

0009-2614 (ISSN)

Vol. 603 75-81

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Energy

Materials Science

Subject Categories

Atom and Molecular Physics and Optics

Infrastructure

Nanofabrication Laboratory

DOI

10.1016/j.cplett.2014.04.036

More information

Latest update

11/5/2018