THE PREPARATION OF COLLOIDAL PT RH ALLOYS STABILIZED BY NR(4)(+)- ANDPR(4)(+)-GROUPS AND THEIR CHARACTERIZATION BY X-RAY-ABSORPTION SPECTROSCOPY/

Authors
BONNEMANN H BRIJOUX W RICHTER J BECKER R HORMES J ROTHE J
Citation
H. Bonnemann et al., THE PREPARATION OF COLLOIDAL PT RH ALLOYS STABILIZED BY NR(4)(+)- ANDPR(4)(+)-GROUPS AND THEIR CHARACTERIZATION BY X-RAY-ABSORPTION SPECTROSCOPY/, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 50(3), 1995, pp. 333-338
Citations number
14
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur Naturforschung. B, A journal of chemical sciences → ACNP
ISSN journal
09320776
Volume
50
Issue
3
Year of publication
1995
Pages
333 - 338
Database
ISI
SICI code
0932-0776(1995)50:3<333:TPOCPR>2.0.ZU;2-A
Abstract
Bimetallic Pt/Rh colloids protected by NR(4)(+)- or PR(4)(+) groups ar e accessible by the coreduction of PtCl2 and RhCl2 using hydrotriorgan oborates in organic media. According to TEM the particle size ranges f rom 1.9 to 2.5 nm. EDX point analysis of several samples has shown tha t both metals are present in the particles. The metallic character of the Pt/Rh core confirmed by XANES, and EXAFS data clearly indicate the formation of nanometallic alloys. Colloidal Pt/Rh alloys prepared in this way are Very soluble and highly stable in organic phases and serv e as sources for heterogeneous hydrogenation catalysts.