E-resources
Peer reviewed
-
Domine, Marcelo E.; Hernández-Soto, M. Consuelo; Navarro, María T.; Pérez, Yolanda
Catalysis today, 01/2011, Volume: 172, Issue: 1Journal Article, Conference Proceeding
Display omitted ► Pt and Pd-nanoparticles supported on well structured solid acids were applied in catalytic reductive aminations. ► Highly efficient Pt/Al-Beta catalysts could be prepared by optimizing Pt and Al contents in solids. ► Pd/MCM-41 catalysts also showed good activities in selective reductive aminations. ► The behaviour of Pt/ and Pd/Al 2O 3 samples strongly depends on the type of alumina pre-treatment used. Metal catalysts based on Pt and Pd nano-particles supported on structured microporous Beta zeolites and mesoporous MCM-41 materials, as well as specially designed γ-Al 2O 3 samples, were synthesized following a simple and economic procedure. Physico-chemical characterization of metal-composites (by XRD, IR spectroscopy, TEM, N 2 adsorption, ICP, among others) indicated that both Pt and Pd nano-particles were adequately supported and homogeneously dispersed on supports. These metal/solid acid composites were applied as efficient catalysts under mild reaction conditions in the selective reductive amination of ketones, a useful industrial reaction for the synthesis of substituted amines and N-heterocycles. Results obtained showed that Pt/Al-Beta catalyst possesses the best catalytic activity (TON = 1610, with amine selectivities >95%) superior to that observed with commercial Pt/C and Pt/Al 2O 3 (TON ≈ 1000). Enhancements in Pt/Al-Beta samples were achieved by optimizing the Pt loading, and mainly the Si/Al molar ratio in solids. On the contrary, inferior catalytic activities were encountered with the Pt/Si-MCM-41 and Pt/Al-MCM-41 materials. The Pd incorporation on MCM-41 materials produced more active catalysts than the commercial Pd/C and Pd/Al 2O 3 samples. Finally, the study of Pt/ and Pd/γ-Al 2O 3 materials demonstrated that the treatments of support prior to the metal impregnation and the posterior calcinations processes were essentials to obtain efficient catalysts.
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.