@article {46896,
	title = {Highly dispersed MnOx nanoparticles on shape-controlled SiO2 spheres for ecofriendly selective allylic oxidation of cyclohexene},
	journal = {Catalysis Letters},
	volume = {150},
	year = {2020},
	month = {OCT},
	pages = {3023-3035},
	type = {Article},
	abstract = {<p>Shape-controlled metal nanomaterials are considered as a unique class of catalysts because of their synergistic size- and shape-dependent catalytic properties. This work reports the synthesis of a novel size- and shape-controlled catalyst, consisting of highly dispersed MnOx nanoparticles (average particle size of 4.5 nm) on shape-controlled SiO2 nanospheres (250-300 nm) for selective cyclohexene oxidation using air as the oxidant under solvent- and base-free conditions. The MnOx/SiO2 catalyst exhibited an excellent cyclohexene conversion (92\%) with a high selectivity (96\%) to the allylic products (2-cyclohexene-ol and 2-cyclohexene-one) under mild conditions, outperforming various SiO2 supported CoOx, FeOx, and CuOx catalysts. The better performance of shape-controlled MnOx/SiO2 nanocatalyst is due to high redox nature of Mn, uniform dispersion of smaller sized MnOx nanoparticles, and synergetic interaction between MnOx and SiO2 spheres, as evidenced by XPS and TEM studies. Further, the MnOx/SiO2 catalyst could be reused at least 5 times for selective cyclohexene oxidation with a negligible loss in its catalytic performance, indicating the excellent stability of shape-controlled metal nanocatalysts in organic synthesis under economically viable and mild conditions.</p>
},
	keywords = {Cyclohexene oxidation, MnOx nanoparticles, Shape-controlled catalyst, SiO2 nanospheres, Structure-performance relationship, Synergetic interaction},
	issn = {1011-372X},
	doi = {10.1007/s10562-020-03205-z, Early Access Date = APR 2020},
	author = {Rao, Bolla Govinda and Sudarsanam, Putla and Rao, Tumula Venkateshwar and Amin, Mohamad Hassan and Bhargava, Suresh K. and Reddy, Benjaram M.}
}
@article {47057,
	title = {Synergistic nanostructured MnOx/TiO2 catalyst for highly selective synthesis of aromatic imines},
	journal = {ChemCatChem},
	volume = {13},
	year = {2021},
	month = {APR},
	pages = {1990-1997},
	type = {Article},
	abstract = {<p>This work reports the development of a synergistic nanostructured MnOx/TiO2 catalyst, with highly dispersed MnOx nanoparticles (4.5 +/- 1 nm) on shape-controlled TiO2 nanotubes (8-11 nm width and 120-280 nm length), for selective synthesis of valuable aromatic imines at industrially important conditions. Pristine TiO2 nanotubes exhibited 97 \% imine selectivity at a 38.3 \% benzylamine conversion, whereas very low imine selectivity was obtained over commercial TiO2 materials, indicating the catalytic significance of shape-controlled TiO2 nanotubes. The MnOx nanoparticle/TiO2 nanotube (10 wt\% Mn) catalyst calcined at 400 degrees C showed the best activity with 95.6 \% benzylamine conversion and 99.9 \% imine selectivity. This catalyst exhibited good recyclability for four times and is effective for converting numerous benzylamines into higher yields of imines. The high catalytic performance of MnOx/TiO2 nanotubes was attributed to higher number of redox sites (Mn3+), high dispersion of Mn species, and shape-controlled structure of TiO2, indicating that this catalyst could be a promising candidate for selective oxidation reactions.</p>
},
	keywords = {Acid-redox properties, aerobic oxidation, Nanostructured catalyst, Selective catalysis, Synergistic metal-oxide interaction},
	issn = {1867-3880},
	doi = {10.1002/cctc.202001870, Early Access Date = FEB 2021},
	author = {Sudarsanam, Putla and Kockritz, Angela and Atia, Hanan and Amin, Mohamad Hassan and Bruckner, Angelika}
}
