Journal
APPLIED SURFACE SCIENCE
Volume 287, Issue -, Pages 293-298Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2013.09.145
Keywords
Pd/SiO2 xerogel catalyst; Nanostructure; XPS; Electron energy loss; Core-shell texture
Categories
Funding
- National Academy of Sciences of Ukraine
Ask authors/readers for more resources
Nanostructured Pd/SiO2 xerogel catalysts prepared via cogelation were characterized by X-ray photoelectron spectroscopy. The preparation route allowed highly porous silica particles to be formed along with embedded Pd nanocrystals. After heat-treating the catalysts in vacuum, Pd was found to be in the metallic state. To obtain information on the xerogel catalyst texture and, in particular, on the size of the silica particles, a theoretical formalism was developed based on measuring the relative intensities of Pd 3d doublet and the associated background tail due to inelastically scattered photoelectrons. The suggested procedure also involved the measurement of the background tails accompanying Si 2p and 0 1s spectral lines as internal standards. Using the developed formalism, the size of the silica particles in the catalysts after different treatments was evaluated and compared with TEM data. The results obtained indicate that the textural properties of the sol-gel catalysts start to develop already at the level of co-condensation of alkoxides with the network-forming reagent. Calcination causes these properties to run to completion. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available