The Electronic Structure of Platinum-Gold Alloy Particles BETTER CATALYSTS FOR SELECTIVE OXIDATIONS

Although the platinum-gold (Pt-Au) phase diagram shows a wide miscibility gap due to limited mutual solubility of the components, small particles (< 3 nm) form homogeneous alloys because all atoms retain their atomic electronic structure, and rehybridisation due to band formation does not take pl...

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Bibliographic Details
Published inJohnson Matthey technology review Vol. 51; no. 2; pp. 63 - 68
Main Author Bond, By Geoffrey C.
Format Journal Article
LanguageEnglish
Published London Johnson Matthey PLC 01.04.2007
Subjects
Atomic structure
Electronic structure
Gold
Low temperature
Miscibility
Phase diagrams
Platinum
Platinum base alloys
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Summary:Although the platinum-gold (Pt-Au) phase diagram shows a wide miscibility gap due to limited mutual solubility of the components, small particles (< 3 nm) form homogeneous alloys because all atoms retain their atomic electronic structure, and rehybridisation due to band formation does not take place. Supported Pt-Au catalysts are often superior to those containing Pt alone for low-temperature selective oxidations.
ISSN:0032-1400
2056-5135
DOI:10.1595/147106707X187353