02646nas 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-chemistry01525nas a2200229   4500008004100000022001400041245009400055210006900149260000800218300001100226490000800237520072900245653001900974653001600993653003301009653002601042653003401068100002201102700001801124700002901142856012401171       2022                        eng d  a1566-736700aShape-controlled nanostructured MoO3/CeO2 catalysts for selective cyclohexene epoxidation0 aShapecontrolled nanostructured MoO3CeO2 catalysts for selective   cAPR  a1064330 v1643 a<p>
	This study reported a vital role of CeO2 shape on the structure-activity properties of MoOx/CeO2 catalysts for cyclohexene epoxidation. Uniform dispersion of MoOx on the surface of shape-controlled CeO2 nanocubes (average particle size: 23.5 nm) and nanorods (average width: 6.3 nm and length: 15-95 nm) was found in MoOx/CeO2 nanomaterials. The MoOx/CeO2 nanocubes showed higher epoxide selectivity (97.3%) with 98.9% cyclohexene conversion, although it has lower BET surface area (30.2 m(2)/g) compared with MoOx/CeO2 nanorods (72.8 m(2)/g). The presence of more electropositive Mo6+ species and the strong Mo-Ce interaction led to improved catalytic efficacy of MoOx/CeO2 nanocubes in cyclohexene epoxidation.</p>
10aCeO2 nanocubes10aCeO2 shapes10aNanosized MoOx/CeO2 catalyst10aSelective epoxidation10aStructure-activity properties1 aSudarsanam, Putla1 aSingh, Nittan1 aKalbande, Pavan, Narayan  uhttps://library.ncl.res.in/content/shape-controlled-nanostructured-moo3ceo2-catalysts-selective-cyclohexene-epoxidation02511nas a2200289   4500008004100000245010800041210006900149260000900218300001600227490000600243520146800249653003101717653001601748653003301764653004401797653003501841100001801876700002401894700003001918700002901948700002401977700002602001700002202027700001902049700002202068856013102090       2023                        eng d00aShape-controlled MoO3/MnO x nanocatalyst for the selective synthesis of 2-phenylquinoxaline drug motifs0 aShapecontrolled MoO3MnO x nanocatalyst for the selective synthes  cDEC   a23442-234530 v63 a<p>
	We have developed a highly effective shape-controlled MoO3/MnOx nanocatalyst for the selective synthesis of 2-phenylquinoxaline drug motifs at room temperature without any external oxidant. Electron microscopy images reveal that the MnOx material contains rod-shaped particles (length: 500-1000 nm and width: 150-200 nm) and the MoO3 species are uniformly dispersed in the MoO3/MnOx material. The MoO3/MnOx nanocatalyst calcined at 500 degrees C (MoO3/MnOx-5) contains abundant strong acid sites and an optimum ratio of Mn4+/Mn3+, which are responsible for the C-N cross-coupling reaction between 2-phenylethylamine and o-phenylenediamine, giving higher yields (&gt;96%) of 2-phenylquinoxaline at mild conditions. The broad scope of this catalytic strategy at room temperature and without an external oxidant was confirmed by achieving &gt;90% yields of functional 2-phenylquinoxalines from C-N cross-coupling of various o-phenylenediamines and 2-phenylethylamines. The outstanding reusability efficiency of the MoO3/MnOx-5 nanocatalyst up to five cycles without the need for a regeneration step as well as the effective scalability highlighted the practicability of the MoO3/MnOx-based catalytic protocol for carbon-heteroatom coupling reactions at room temperature and without an external oxidant. Using computational studies, the possible reasons for the selective synthesis of 2-phenylquinoxaline over the MoO3/MnOx-5 nanocatalyst were elucidated.</p>
10acascade C-N cross-coupling10aDFT studies10aroom temperature andopen air10ashape-controlled MoO3/MnOx nanocatalyst10astructure-activity correlation1 aSingh, Nittan1 aPutla, Suresh, Babu1 aSingh, Chandrodai, Pratap1 aKalbande, Pavan, Narayan1 aChoudhary, Priyanka1 aKrishnamurty, Sailaja1 aKrishnan, Venkata1 aBhatte, Kushal1 aSudarsanam, Putla  uhttps://library.ncl.res.in/content/shape-controlled-moo3mno-x-nanocatalyst-selective-synthesis-2-phenylquinoxaline-drug-motifs