Co
(0) – Toluene in
toluene solution
(Stabilized by 2-butyne) Con microclusters, (n ≤ 10) as evidenced by EPR
Active in the cyclococyclization of alkynes and nitriles;it has been proved successful even in hydroformylation reaction.
Suitable
for the deposition of activated Co particles, ranging 2 – 3 nm in diameter, on
C or solid oxide supports.
J.
Mol. Catal., 56 (1989) 133.
Rhodium
– Mesitylene in mesitylene solution
Rhodium
– THF
in THF solution
(Stabilized
by trioctylamine (TOA))
Rhn
nanoclusters ranging 0.5 – 1 nm in diameter
Excellent
precursors for the deposition of activated Rh particles,ranging 1 – 2 nm in
diameter, on C or solid oxide supports.
J. Organomet. Chem., 487 (1995) 41 ; Sinth. Methods Organomet. and Inorg. Chemistry,
Catalysis, Brauer, Herrmann, Vol.10, 64-71 (2002).
Platinum
(0) – Mesitylene
in mesitylene
solution
(Stabilized
by vinylsiloxanes)
Ptn
nanoparticles ranging 0.5 - 1 nm, as evidenced by TOF-MS analysis
Excellent catalyst for hydrosilylation reactions
Excellent
precursors for the deposition of Pt nanoparticles on C or solid oxide supports
J.
Organomet. Chem., 451 (1993) C4;
J. Mol. Catal., 91 (1994) 83
Palladium
(0) – Mesitylene in mesitylene solution
(Stabilized
by TOA)
Pdn
nanoparticles ranging 0.5 - 1 nm
Active in Heck reactions
Suitable
for the deposition of active Pd nanoparticles, ranging 1 – 2 nm in diameter,
on C or solid oxide supports
2Th European Catalysis Symposium Pisa (Italy), 23-26 September 2001, Abstract P33
Au
(0) – Acetone in
acetone solution
Aun
microclusters (n<10) stabilized by acetone; as shown by
TOF-MS analyses
Active catalysts in oxygenation reactions with molecular oxygen
9Th
FECS Conference, Bordeaux (F), 2004 29 August – 1 September, Abstract p.353
Fe(0)
– Cycloolefins in
aliphatic solvents
Active catalysts for the cyclotrimerization of alkynes and for hydroformylation reactions
Suitable
for the deposition of active Fe nanoparticles on solid supports and for the
preparation of magneto fluids
J. Organomet. Chem., 607 (2000) 57
An
example of the catalytic activity and selectivit
Idrosilylation
of vinyl compounds with a Pt-mesitylene solution obtained via MVS technique.
In
analogous conditions a Pt “Karstedt” catalyst does not catalyse the reaction.
Active in the oxidation of cycloalkanes, thiols,cysteine to cystine ecc. with molecular oxygen or air.
Chem. Mater., 14 (2002) 1183
Active in the oxidation of alcohols to ketones, cysteine to cystine with molecular oxygen.
Chim.
Ind. (Milan, Italy) 83 (2001) 60
Active in the oxidation of alcohols to ketones, cysteine to cystine ecc. with molecular oxygen.
 |
J. Organomet.Chem., 690 (2005) 1063
Very active hydrogenation catalysts.
Mater.
Sci. Forum, 235 (1997) 929
Very active hydrogenation catalysts; it has been
proved successful in the hydrosilylation of nitriles.
Mater
Sci. Eng., 15 (2001) 207
J.
Mol. Catal., 150 (1999) 275
An example of the activity and selectivity of powders obtained by MVS technique:
Hydrosilylation of acetylenic compounds with a commercial Au catalyst and with an analogous system prepared
via Metal Vapour Synthesis technique.
Au
Commercial sample
Au MVS
sample
Supported Catalysts
Rhodium: metal
particles ranging 1-2 nm in diameter
Rh/g-Al2O3
Rh/C
Excellent catalysts for hydrogenation, hydrosilylation, silylformilation reactions; they are largely more active than analogous commercial
 |
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| Particles size distribution of a |
Particles size distribution of a |
J. Oganomet. Chem., 681 (2003) 37
Platinum: metal
particles ranging 1-2 nm in diameter
Pt/g-Al2O3
Pt/C
Very active hydrogenation and hydrosilylation catalysts
 |
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| Particles size distribution of a |
Particles size distribution of a |
J.
Mol. Catal., 91 (1994) 83
J.
Catal., 229 (2005) 283
Palladium: metal
particles ranging 1-2 nm in
Pd/g-Al2O3
and Pd/C samples and 3-4 nm in Pd/PDMP
catalysts
Pd/g-Al2O3
Pd/C
Very active hydrogenation catalysts
Particles
size distribution of a Pd/C sample
Pd/PDMP
Excellent catalysts for Heck reactions, without valuable leaching of Pd
Particles
size distribution of a Pd/PDMP sample
(PDMP =
polydimethylphosphazene)
Applicative
Aspects Polyorganophosphazenes, M. Gleria, R. De Jaeger, Eds. Nova Science Publ.,
New York (2004) pp.255-265
Gold: particle size distribution raging 4 nm in diameter
Au/g-Al2O3
Au/C
Valuable catalysts for hydrosilylation reactions
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Particles
size distribution of Au/C 1 % w/w sample
J.
Organomet.Chem., 690 (2005) 1063
Ruthenium: metal
particles ranging 2.4 nm in diameter
Ru/g-Al2O3
Ru/C
Very active arene hydrogenation catalysts
J.
Organomet.Chem., 289 (2004) 639
Cobalt: metal
particles ranging 2.5 nm in diameter
Co/g-Al2O3
Co/C
Very active in Fischer-Tropsch reaction
Examples
of the activity of supported catalysts prepared via MVS technique
Arene Hydrogenation
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| Hydrogenation reaction of aromatic compounds with a commercial Rh/g-Al2O3 5 w/w % and with an analogous system prepared via M V S technique |
| Silylformylation reaction of 1-hexine with a commercial Rh/g-Al2O3 5 w/w % and with an analogous system prepared via M V S technique |
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Synthesis and Methodologies in Inorganic Chemistry, L.
Armalao, D. Barreca, S. Daolio, E. Tondello, P. A. Vigato, Eds. 2001, vol. 9,
pp. 43-51
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