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Co‐TUD‐1: A Ketone‐Selective Catalyst for Cyclohexane Oxidation
Author(s) -
Hamdy Mohamed S.,
Ramanathan Anand,
Maschmeyer Thomas,
Hanefeld Ulf,
Jansen Jacobus C.
Publication year - 2006
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200500166
Subject(s) - cyclohexane , ketone , catalysis , chemistry , organic chemistry
Cobalt‐containing mesoporous TUD‐1 with different Si/Co ratios (100, 50, 20, and 10) was synthesized by the direct hydrothermal treatment method (DHT) using triethanolamine (TEA) as a template. The prepared samples (denoted as Co‐TUD‐1) were characterized by XRD, UV/Vis spectroscopy, elemental analysis, N 2 sorption measurements, 29 Si magic‐angle spinning (MAS)‐NMR, Raman spectroscopy, and HRTEM. The catalytic performance of Co‐TUD‐1 samples was tested in the liquid‐phase oxidation of cyclohexane with tert ‐butylhydroperoxide (TBHP) as oxidant under solventless conditions. Higher catalytic efficiency was observed in samples with low Co‐loading and thus, most likely isolated Co II active sites, than in samples with high Co‐loading and nanoparticles or bulk Co 3 O 4 embedded in the TUD‐1 silica.