Number of the records: 1
Palladium catalysts deposited on silica materials: Comparison of catalysts based on mesoporous and amorphous supports in Heck reaction
- 1.
SYSNO ASEP 0352624 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Palladium catalysts deposited on silica materials: Comparison of catalysts based on mesoporous and amorphous supports in Heck reaction Author(s) Demel, J. (CZ)
Čejka, Jiří (UFCH-W) RID, ORCID, SAI
Štěpnička, P. (CZ)Source Title Journal of Molecular Catalysis A-Chemical. - : Elsevier - ISSN 1381-1169
Roč. 329, 1-2 (2010), s. 13-20Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords heterogeneous catalysts ; immobolized catalysts ; supported catalysts Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA104/09/0561 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000281321000003 DOI 10.1016/j.molcata.2010.06.011 Annotation Palladium catalysts supported on different silica-based materials were investigated in the Heck reaction of n-butyl acrylate with bromobenzene at 160 degrees C. The main objective was to understand the role of mesopores in the catalysts supported on SBA-15 functionalised with (CH2)(3)NH(CH2)(2)NEt2 donor groups at the surface in comparison with the analogous silica gel-based catalysts. The results obtained evidence a crucial influence of the ratio of the anchoring groups to palladium (N/Pd): a higher excess of coordinating groups in the catalysts results in a higher catalytic activity, probably because such supports aid the deposition of the metal onto the support and, simultaneously, prevent aggregation of the 'active' metal species at high reaction temperatures. This is very important as the reactions with deposited palladium catalysts typically take place in solution with the metal first leaching out from the support and then returning back to the solid matrix. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2011
Number of the records: 1