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          Institute: Fritz-Haber-Institut     Collection: Molecular Physics     Display Documents



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ID: 8339.0, Fritz-Haber-Institut / Molecular Physics
Structural studies and stability of cluster-like RuxSey electrocatalysts
Authors:Dassenoy, Fabrice; Vogel, Walter; Alonso-Vante, Nicolas
Language:English
Date of Publication (YYYY-MM-DD):2002-11-28
Title of Journal:Journal of Physical Chemistry B
Journal Abbrev.:J. Phys. Chem. B
Volume:106
Issue / Number:47
Start Page:12152
End Page:12157
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Structural studies and stability of cluster-like particles of Ru-x and RuxSey were performed in situ via X-ray diffraction at wide angles (WAXS). Both materials have a similar particle size (1.4-1.6 nm) in the reduced state. Whereas Ru-x particles are rather sensitive to oxygen from air, the chemical stabilization, against oxidation, of such metallic centers is obtained by the coordination of selenium atoms. The role of selenium atoms is also to stabilize the nanostructural nature (geometric effect) of the compound, as demonstrated by the temperature measurements (up to 300 degreesC) in the gas phase, and to provide the electronic effect for electrocatalysis.
Free Keywords:X-RAY-DIFFRACTION; OXYGEN REDUCTION; RUTHENIUM CATALYSTS; TRANSITION-METAL; IN-SITU; TEMPERATURE; OXIDATION; RUO2(110); CARBONYL; RU/TIO2
External Publication Status:published
Document Type:Article
Communicated by:Gerard Meijer
Affiliations:Fritz-Haber-Institut/Molecular Physics
External Affiliations:Lab. Electrocatalyse, UMR-CNRS, Poitiers, France
Identifiers:URL:http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/20...
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