00642nas a2200157   4500008004100000022001400041245009100055210006900146260007300215300000800288490000800296100002400304700001900328700002200347856011500369       2012                        eng d  a0920-586100aSpecial Issue dedicated to Paul Ratnasamy on the occasion of his 70th birthday preface0 aSpecial Issue dedicated to Paul Ratnasamy on the occasion of his  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC  a1-20 v1981 aReddy, Benjaram, M.1 aSivasanker, S.1 aRamaswamy, A., V.  uhttps://library.ncl.res.in/content/special-issue-dedicated-paul-ratnasamy-occasion-his-70th-birthday-preface-002306nas a2200277   4500008004100000022001400041245013200055210006900187260000800256300001400264490000800278520130000286653002601586653002301612653003001635653002101665653003901686653002701725100002401752700002201776700002801798700002601826700002501852700002401877856012701901       2020                        eng d  a1011-372X00aHighly dispersed MnOx nanoparticles on shape-controlled SiO2 spheres for ecofriendly selective allylic oxidation of cyclohexene0 aHighly dispersed MnOx nanoparticles on shapecontrolled SiO2 sphe  cOCT  a3023-30350 v1503 a<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>
10aCyclohexene oxidation10aMnOx nanoparticles10aShape-controlled catalyst10aSiO2 nanospheres10aStructure-performance relationship10aSynergetic interaction1 aRao, Bolla, Govinda1 aSudarsanam, Putla1 aRao, Tumula, Venkateshw1 aAmin, Mohamad, Hassan1 aBhargava, Suresh, K.1 aReddy, Benjaram, M.  uhttps://library.ncl.res.in/content/highly-dispersed-mnox-nanoparticles-shape-controlled-sio2-spheres-ecofriendly-selective02646nas a2200289   4500008004100000022001400041245012500055210006900180260000800249300001600257490000700273520167000280653001201950653002501962653001401987653002702001653002102028653001902049100002202068700002602090700002202116700001802138700002902156700002402185700001902209856012802228       2021                        eng d  a2155-543500aSupported MoOx and WOx solid acids for biomass valorization: interplay of coordination chemistry, acidity, and catalysis0 aSupported MoOx and WOx solid acids for biomass valorization inte  cNOV  a13603-136480 v113 aSupported molybdenum oxide (MoOx) and tungsten oxide (WOx) materials are a vital class of solid acid catalysts for the chemical industry because of their nontoxic nature, strong acidity, remarkable stability in water, hydrogen, and oxygen atmospheres, and excellent reusability performance. These fascinating solid acids play a pivotal role in developing sustainable catalytic routes for renewable biomass processing to produce value-added fuels, chemicals, and platform molecules. The coordination chemistry of MoOx and WOx on the support materials (oxides, carbons, or zeolites) controls their acidic strength, active site accessibility, and catalytic activity. Hence, significant efforts have been made toward optimizing the conditions used for catalyst synthesis and biomass processing to tune the coordination chemistry of MoOx and WOx with the substrate molecules and, thus, their acid-activity/selectivity performance. This Review provides a comprehensive overview of supported MoOx and WOx solid acids for biomass valorization. The importance of the biomass and the role of solid acids for biomass valorization were emphasized, followed by a brief discussion of supported MoOx and WO(x )solid acids. Afterward, the interplay of coordination chemistry, acidic strength, and catalytic activity of supported MoOx and WOx solid acids was discussed. Finally, their catalytic applications for the valorization of several biomass substrates and their derivatives were summarized. This Review will provide valuable insights for developing advanced supported WOx and MoOx solid acids for catalytic biomass valorization and other challenging acid-catalyzed processes.10aAcidity10abiomass valorization10acatalysis10aCoordination chemistry10amolybdenum oxide10atungsten oxide1 aSudarsanam, Putla1 aGupta, Navneet, Kumar1 aMallesham, Baithy1 aSingh, Nittan1 aKalbande, Pavan, Narayan1 aReddy, Benjaram, M.1 aSels, Bert, F.  uhttps://library.ncl.res.in/content/supported-moox-and-wox-solid-acids-biomass-valorization-interplay-coordination-chemistry