01584nas a2200217   4500008004100000022001400041245006300055210006200118260009500180300001200275490000800287520083200295653001701127653002201144653002101166653002601187100001801213700002201231700001801253856009501271       2016                        eng d  a0021-951700aCO oxidation on large high-index faceted Pd nanostructures0 aCO oxidation on large highindex faceted Pd nanostructures  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcMAY  a138-1440 v3373 a<p>The structure sensitivity of CO oxidation has been investigated on oxide-supported palladium nanoparticles of different morphologies. The reactivity of concave nanocubes and nanoflowers that expose {3 1 0} and {3 1 1} high-index facets showed a lower onset temperature for CO oxidation than Pd nanospheres of size around 6 nm. These concave nanocubes and nanoflowers were also found to catalyze the CO oxidation reaction more efficiently than simple cubes and spheres of similar size that exposed low-index facets. The enhanced activity of these nanoparticles compared with other morphologies are attributed to the presence of sites of under-coordination on the exposed high-index facets. The larger nanoparticles were also found to be more stable in the reaction environment. (C) 2016 Elsevier Inc. All rights reserved.</p>10aCO oxidation10aHigh-index facets10aPd nanoparticles10astructure sensitivity1 aSreedhala, S.1 aSudheeshkumar, V.1 aVinod, C., P.  uhttps://library.ncl.res.in/content/co-oxidation-large-high-index-faceted-pd-nanostructures02744nas a2200241   4500008004100000022001400041245015300055210006900208260007300277300001200350490000800362520179300370653002802163653003602191653001602227653003702243100001702280700002102297700002002318700001802338700001802356856012802374       2016                        eng d  a0926-860X00aCorrelating the role of hydrophilic/hydrophobic nature of Rh(I) and Ru(II) supported organosilica/silica catalysts in organotransformation reactions0 aCorrelating the role of hydrophilichydrophobic nature of RhI and  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a138-1460 v5133 a<p>Highly reactive and hydrophobic triphenyl phosphine based rhodium(I) and ruthenium(II) organometallic complexes over benzene containing periodic mesoporous organosilica (PMOB) have been synthesized. This has been achieved by the immobilization of neat metal complexes like RhCl(PPh3)(3) [Wilkinson catalyst], RuHCl(CO)(PPh3)(3) and RuCl2(PPh3)(3) over aminofunctionalized PMOB to get RhCl(PPh3)(2)-PrNH2PMOB, RuHCl(CO)(PPh3)(2)-PrNH2PMOB and RuCl2(PPh3)(3)-PrNH2PMOB, respectively. The physico-chemical properties of the functionalized catalysts were analyzed by elemental analysis, ICP-OES, XRD, N-2 sorption analyses, FT-IR, solid state C-13 and Si-29 NMR spectra, XPS, SEM, TEM and contact angle measurements. The XRD and N-2 sorption analyses showed excellent textural properties with ordered mesoporous channel structure of all synthesized catalysts. The organic moieties anchored in PMOB were confirmed by C-13 CPMAS NMR and Fr-IR spectroscopy with Si-29 CPMAS NMR spectroscopy providing the information about the degree of functionalization of surface silanol groups with organic moiety. The Rh(I) and Ru(II) complexes supported on MCM-41/SBA-15/PMOE (ethane-PMO) were synthesized, and their catalytic activities in hydrogenation and sulfoxidation reactions were compared with Rh(I) and Ru(II) complexes supported on PMOB. The results show that PMOB based catalysts exhibit higher activities and selectivities than MCM-41/SBA-15/PMOB supported catalysts, neat homogeneous complexes and without catalyst. The better catalytic performance of PMOB based catalyst is attributed to the hydrophobic nature and high surface area of the PMOB support. The recycling studies of anchored catalysts show no major deactivation of the catalyst. (C) 2015 Elsevier B.V. All rights reserved.</p>10aHeterogeneous catalysts10aHydrogenation and sulfoxidation10aHydrophobic10aPeriodic mesoporous organosilica1 aLazar, Anish1 aGeorge, Shoy, C.1 aJithesh, P., R.1 aVinod, C., P.1 aSingh, A., P.  uhttps://library.ncl.res.in/content/correlating-role-hydrophilichydrophobic-nature-rhi-and-ruii-supported-organosilicasilica01597nas a2200193   4500008004100000022001400041245011300055210006900168260000900237300001400246490000800260520089100268100001701159700003001176700002101206700002901227700001801256856012901274       2017                        eng d  a1932-744700aConvenient route for Au@Ti-SiO2 nanocatalyst synthesis and its application for room temperature CO oxidation0 aConvenient route for AuTiSiO2 nanocatalyst synthesis and its app  cMAR   a4946-49570 v1213 a<p>Small gold nanoparticles.of size less than 5 nm encapsulated inside titanium modified silica shell have been reported. Here, a modified sol-gel method, which is a one-step process, produces Au@Ti-SiO2 nanocatalyst with a good control of titanium loading. With a titanium loading of 0.9 and 2.2 wt % in silica, unprecedented low temperature activity (full conversion) is observed for this catalyst for CO oxidation reaction compared to Au@SiO2 catalyst. A combination of optimum sized gold nanoparticles with a large amount of oxygen vacancies created due to Ti incorporation in silica matrix is considered to be the reason for this enhanced catalytic activity. The size of.gold nanoparticles is maintained even after high temperature pretreatments, which show the benefit of encapsulation. The effect of the various pretreatments on the catalytic activity has also been reported.</p>1 aSoni, Yogita1 aKumar, Anumol, Erumpukuth1 aNayak, Chandrani1 aDeepak, Francis, Leonard1 aVinod, C., P.  uhttps://library.ncl.res.in/content/convenient-route-auti-sio2-nanocatalyst-synthesis-and-its-application-room-temperature-co01888nas a2200241   4500008004100000022001400041245012100055210006900176260000900245300001600254490000600270520107700276653002201353653002601375653001801401653002101419653000801440100001801448700001701466700002201483700001801505856012301523       2020                        eng d  a2168-048500aCO2 hydrogenation to formate by palladium nanoparticles supported on N-incorporated periodic mesoporous organosilica0 aCO2 hydrogenation to formate by palladium nanoparticles supporte  cOCT   a14765-147740 v83 a<p>Development of a heterogeneous catalyst capable of selective transformation of CO2 to valuable products still remains a challenge. In this article, we account for the surfactant-directed synthesis of a new framework-incorporated nitrogen-containing periodic mesoporous organosilica nanosphere (NPMO). A thoroughly characterized N-incorporated hybrid PMO was utilized as a platform for stabilizing well-dispersed and easily accessible Pd nanoparticles (Pd-NPMO) without using any stabilizing agents or expensive dendrimers. Further, this bifunctional hybrid catalyst has been demonstrated to heterogeneously catalyze aqueous phase CO2 hydrogenation (CO2/H-2 ratio 1:3) for the direct synthesis of formate under 4 MPa pressure and at 100 degrees C. To validate the superior performance of the Pd-NPMO catalyst, we compared the activity with Pd-SBA-15 catalysts, and the results showed a 10-fold increase in turnover frequency of 108 h(-1) using Pd on NPMO which envisaged the crucial role of nitrogen sites in this catalyst to boost the CO2 valorization to formate.</p>
10aCO2 hydrogenation10aFormic acid synthesis10aHybrid silica10aPd nanoparticles10aPMO1 aBetsy, K., J.1 aLazar, Anish1 aPavithran, Anjuna1 aVinod, C., P.  uhttps://library.ncl.res.in/content/co2-hydrogenation-formate-palladium-nanoparticles-supported-n-incorporated-periodic00688nas a2200169   4500008004100000022001400041245016000055210006900215260000900284300000900293490000700302100001900309700002000328700001800348700002500366856012700391       2021                        eng d  a1359-734500aConductive interface promoted bifunctional oxygen reduction/evolution activity in an ultra-low precious metal based hybrid catalyst (vol 57, pg 1951, 2021)0 aConductive interface promoted bifunctional oxygen reductionevolu  cMAR   a28240 v571 aSarkar, Shreya1 aVarghese, Merin1 aVinod, C., P.1 aPeter, Sebastian, C.  uhttps://library.ncl.res.in/content/conductive-interface-promoted-bifunctional-oxygen-reductionevolution-activity-ultra-low00963nas a2200181   4500008004100000022001400041245013600055210006900191260000800260300001400268490000700282520028100289100001900570700002000589700001800609700002500627856012900652       2021                        eng d  a1359-734500aConductive interface promoted bifunctional oxygen reduction/evolution activity in an ultra-low precious metal based hybrid catalyst0 aConductive interface promoted bifunctional oxygen reductionevolu  cFEB  a1951-19540 v573 a<p>Ultra low PtPd alloy deposited on Ni12P5 nanostructures (PtPd/Ni12P5) exhibited enhanced ORR activity (onset: 1.003 V and E-1/2:0.95 V) on par with commercial Pt/C and superior OER activity with 81% reduction of the precious metal compared to the commercial catalyst.</p>
1 aSarkar, Shreya1 aVarghese, Merin1 aVinod, C., P.1 aPeter, Sebastian, C.  uhttps://library.ncl.res.in/content/conductive-interface-promoted-bifunctional-oxygen-reductionevolution-activity-ultra-low-001316nas a2200289   4500008004100000022001400041245008000055210006900135260000800204300001100212490000800223520045700231653001900688653000800707653001800715653002500733653001900758653002000777100001800797700002000815700001800835700002000853700001900873700001600892700001900908856009900927       2021                        eng d  a0926-337300aCuO as a reactive and reusable reagent for the hydrogenation of nitroarenes0 aCuO as a reactive and reusable reagent for the hydrogenation of   cNOV  a1204170 v2973 a{Copper oxide (CuO) is used as a reusable solid reagent for hydrogenation of nitroarenes to aminoarenes. The use of CuO resulted in 100 % conversion of 2.9 mmol of nitrobenzene to aniline in 45 s at room temperature using hydrazine hydrate as the reducing agent. During the reaction, CuO is converted to inactive metallic Cu which can be regenerated to active CuO by thermal oxidation. DFT simulations indicated facile formation of oxygen vacancies (EO10aCopper vacancy10aCuO10aHydrogenation10aNitroarene reduction10aOxygen defects10aReactive solids1 aRajendran, K.1 aPandurangan, N.1 aVinod, C., P.1 aKhan, Tuhin, S.1 aGupta, Shelaka1 aHaider, Ali1 aJagadeesan, D.  uhttps://library.ncl.res.in/content/cuo-reactive-and-reusable-reagent-hydrogenation-nitroarenes02041nas a2200289   4500008004100000022001400041245012200055210006900177260000800246300001100254490000800265520108000273653001801353653002601371653003801397653002001435100002101455700001901476700001901495700001901514700002101533700001601554700001801570700001901588700002201607856012201629       2023                        eng d  a0926-337300aCovalently interconnected layers in g-C3N4: toward high mechanical stability, catalytic efficiency and sustainability0 aCovalently interconnected layers in gC3N4 toward high mechanical  cMAR  a1220690 v3223 a<p>
	The grim prospects for the industrial utilization of g-C3N4 nanosheets arise from multi-step processing resulting in low material yields and poor visible light response due to quantum confinement. Herein, we introduce a strategy for linking the adjacent layers of g-C3N4 covalently to realize a high surface area without excess mass loss in a one-step process by introducing diethylene glycol as a precursor that produces-(CH2)2-O-(CH2)2-linkers in-situ. Their presence increases interlayer spacing and introduces surface curvatures, discouraging the stacking of a larger number of layers to produce nanosheets with-3 times higher surface area. Interestingly, unlike other layered materials, the linkers also provide extraordinary mechanical stability against exfoliating forces. In addition, the process instills sub-bandgap states and a considerable visible light response at 500 nm to slow down the picosecond exciton recombination dynamics, resulting in-5 times enhancement in H2 generation efficiency from photocatalytic water-splitting over the bulk sample.</p>
10aLayer-linkers10aSustainable synthesis10aTransient absorption spectroscopy10awater-splitting1 aRoy, Raj, Sekhar1 aMondal, Sanjit1 aMishra, Samita1 aBanoo, Maqsuma1 aSahoo, Lipipuspa1 aKumar, Amit1 aVinod, C., P.1 aDe, Arijit, K.1 aGautam, Ujjal, K.  uhttps://library.ncl.res.in/content/covalently-interconnected-layers-g-c3n4-toward-high-mechanical-stability-catalytic