Thermodynamics of hydride formation and decomposition in supported sub-10 nm Pd nanoparticles of different sizes
Artikel i vetenskaplig tidskrift, 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.

isotherms

thermodynamics

subsurface hydrogen

Palladium

hydrogen storage

plasmonic sensing

Författare

Carl Wadell

Chalmers, Teknisk fysik, Kemisk fysik

Torben Nilsson Pingel

Chalmers, Teknisk fysik, Eva Olsson Group

Vladimir Zhdanov

Chalmers, Teknisk fysik, Kemisk fysik

Igor Zoric

Chalmers, Teknisk fysik, Kemisk fysik

Christoph Langhammer

Chalmers, Teknisk fysik, Kemisk fysik

Eva Olsson

Chalmers, Teknisk fysik, Eva Olsson Group

Chemical Physics Letters

0009-2614 (ISSN)

Vol. 603 75-81

Styrkeområden

Nanovetenskap och nanoteknik

Energi

Materialvetenskap

Ämneskategorier

Atom- och molekylfysik och optik

Infrastruktur

Nanotekniklaboratoriet

DOI

10.1016/j.cplett.2014.04.036