@article {44639,
	title = {Selective oxidation of cyclohexane to cyclohexanone using chromium oxide supported mesoporous MCM-41 nanospheres: probing the nature of catalytically active chromium sites},
	journal = {ChemCatChem},
	volume = {10},
	year = {2018},
	month = {AUG},
	pages = {3291-3298},
	abstract = {<p>Highly dispersed chromium oxide supported mesoporous MCM-41 nanosphere catalysts have been synthesized using a simple wet impregnation method. This work is devoted to a systematic study to reveal the active Cr sites in chromium oxide supported MCM-41 nanosphere catalysts for the selective oxidation of cyclohexane to cyclohexanone. To probe the nature of the active species, we synthesized 0.5-10wt\% Cr loaded catalysts and characterized them by using XRD, UV/Vis spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, extended X-ray absorption fine structure analysis, X-ray absorption near edge structure analysis, N-2 sorption analysis, FTIR spectroscopy, (SiNMR)-Si-29 spectroscopy, SEM, and TEM. The liquid-phase oxidation of cyclohexane to cyclohexanone (99\% selectivity) was performed under mild reaction conditions, and the results reveal clearly that the 5wt\% Cr loaded catalyst was optimum for the reaction. The initial composition of isolated Cr3+ species in the catalyst is the major factor that influences the enhanced activity for cyclohexane oxidation.</p>},
	keywords = {chromium, heterogeneous catalysis, Nanostructures, Oxidation, supported catalysts},
	issn = {1867-3880},
	doi = {10.1002/cctc.201800309},
	author = {Betsy, Kurisingal J. and Nayak, Chandrani and Lazar, Anish and Krishnan, Athira and Bhattacharyya, Dibyendu and Jha, Shambhu N. and Vinod, Chathakudath P.}
}
