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- Title
Preparation of colloidal solutions of noble metals stabilized by polyoxometalates and supported satalysts based on these solutions.
- Authors
Maksimova, G.; Chuvilin, A.; Moroz, E.; Likholobov, V.; Matveev, K.
- Abstract
Conditions for the preparation of stable aqueous monometallic and bimetallic colloidal solutions (sols) of noble metals (Ru, Rh, Pd, Pt, Ir, Ag, and Au) in the presence of polyoxometalates containing W, Mo, V, and Nb were found. The stability of sols against coagulation at room temperature was studied. The metal/C samples prepared by metal adsorption from sols were studied by powder X-ray diffraction analysis and transmission electron microscopy. The following factors of importance for the preparation of a stable sol are discussed: (1) the formation of a sol of a metal polyhydroxo complex stabilized by a polyoxometalate (preliminary stage) and (2) the formation of polyoxometalate-metal clusters in the course of reduction of polyhydroxo complexes.
- Subjects
COLLOIDS; LAMINATED metals; PRECIOUS metals; SOLUTION (Chemistry); POLYOXOMETALATES; METALLIC oxides; COORDINATION compounds; TRANSMISSION electron microscopy
- Publication
Kinetics & Catalysis, 2004, Vol 45, Issue 6, p870
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1007/s10975-005-0054-3