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Cluster–support interaction in Au–Fe3O4 system
- Source :
- Catalysis Today. 169:24-28
- Publication Year :
- 2011
- Publisher :
- Elsevier BV, 2011.
-
Abstract
- Cluster–support interaction in a Au–Fe3O4(0 0 1) system was studied using scanning tunneling microscopy, X-ray photoemission spectroscopy and Mossbauer spectroscopy, in situ, under ultra high vacuum conditions. Deposition of 0.02–5 monolayers of Au resulted in the growth of two- and three-dimensional gold nano-cluster. The positive shift of the Au 4f7/2 electron binding energy for the smallest clusters was correlated with modification of the electronic structure in the surface magnetite layer, as found from Mossbauer analysis, leading to conclusion that a positive charging of small Au clusters can be responsible for their outstanding catalytic activity.
Details
- ISSN :
- 09205861
- Volume :
- 169
- Database :
- OpenAIRE
- Journal :
- Catalysis Today
- Accession number :
- edsair.doi...........86f4b62c884a044140c5ad4b7164df8b