Communications : Suppression of sintering of size-selected Pd clusters under realistic reaction conditions for catalysis.

Journal Article · Fri Apr 08 00:00:00 EDT 2011 · J. Chem. Phys.

DOI:https://doi.org/10.1063/1.3575195· OSTI ID:1013331

Yin, F; Lee, S; Abdela, A; Vajda, S; Palmer, R E ^[1]

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1. Center for Nanoscale Materials

The stability of model catalysts based on size-selected Pd clusters supported on graphite surfaces has been explored under realistic conditions for catalytic oxidation of methane at mild temperatures. The experimental results show that aggregated films of nanoparticles are highly unstable, but clusters pinned to the surface in the submonolayer coverage regime are much more stable against sintering. The degree of sintering of the pinned clusters, which does occur, proceeds by the release of clusters from their pinning sites. The suppression of sintering depends on the cluster deposition energy with respect to the pinning threshold.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); Univ. of Birmingham
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 1013331
• Report Number(s): ANL/MSD/JA-69492; TRN: US201110%%587
• Journal Information: J. Chem. Phys., Vol. 134, Issue 14 ; Apr. 8, 2011
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

03 NATURAL GAS
CATALYSIS
CATALYSTS
COMMUNICATIONS
DEPOSITION
GRAPHITE
METHANE
OXIDATION
SINTERING
STABILITY