Particle size effect of hydrogen-induced lattice expansion of palladium nanoclusters.

Journal Article · Sun Nov 30 23:00:00 EST 2008 · Phys. Rev. B

DOI:https://doi.org/10.1103/PhysRevB.78.245408· OSTI ID:1000216

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; Quest, Reliability Ltd; Imperial, Coll

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: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; New Zealand Foundation for Research, Science and Technology
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1000216
• Report Number(s): ANL/MSD/JA-68703
• Journal Information: Phys. Rev. B, Journal Name: Phys. Rev. B Journal Issue: Dec. 2008 Vol. 78; ISSN 1098-0121
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

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