期刊
JOURNAL OF CHEMICAL PHYSICS
卷 134, 期 14, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3575195
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资金
- Engineering and Physical Sciences Research Council (EPSRC)
- University of Birmingham
- US Department of Energy, BES-Chemical Sciences, BES-Materials Sciences, and BES-Scientific User Facilities [DE-AC-02-06CH11357]
- UChicago Argonne, LLC, Operator of Argonne National Laboratory
- Engineering and Physical Sciences Research Council [EP/E005918/1] Funding Source: researchfish
- EPSRC [EP/E005918/1] Funding Source: UKRI
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. (C)2011 American Institute of Physics. [doi:10.1063/1.3575195]
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