Particle Size Effect of Hydrogen-Induced Lattice Expansion of Palladium Nanoclusters

Journal Article · Mon May 18 00:00:00 EDT 2009 · Phys. Rev. B78:245408,2008

OSTI ID:953125

Ingham, B; Toney, M F; Hendy, S C; Cox, T; Fong, D D; Eastman, J A; Fuoss, P H; Stevens, K J; Lassesson, A; Brown, S A; Ryan, M P

In situ synchrotron x-ray diffraction experiments on bare palladium nanoclusters prepared by inert-gas aggregation and size selected (1.7-6.0 nm) show significant changes in lattice parameter upon hydrogen loading and a narrowing of the miscibility gap, as the cluster size decreases. The results show that the miscibility gap is open for all cluster sizes studied, in contrast to previous literature results from surfactant-encapsulated palladium clusters. We interpret these results by showing that the nature of the surface is critical in the hydrogenation behavior of the nanoclusters.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 953125
• Report Number(s): SLAC-REPRINT-2009-159
• Journal Information: Phys. Rev. B78:245408,2008, Journal Name: Phys. Rev. B78:245408,2008 Journal Issue: 24 Vol. 78
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
43 PARTICLE ACCELERATORS
HYDROGEN
HYDROGENATION
LATTICE PARAMETERS
Other
OTHER
PHYS
PALLADIUM
PARTICLE SIZE
SOLUBILITY
SYNCHROTRONS
X-RAY DIFFRACTION