01821nas a2200241 4500008004100000022001400041245019800055210006900253260007300322300000800395490000800403520084100411653001701252653001801269653002201287653003301309653003601342100001801378700002301396700001801419700001801437856012401455 2016 eng d a0926-860X00aLarge trisoctahedral Au nanoparticles encapsulated inside porous silica catalyses CO oxidation at room temperature: probing the effect of encapsulation and the role of step atoms and interfaces0 aLarge trisoctahedral Au nanoparticles encapsulated inside porous aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG a1-70 v5243 a

As envisaged, a synthesis strategy is reported for encapsulating high index faceted trisoctahedral Au nanoparticles inside porous silica to preserve nanoparticle size by preventing sintering. Further, to probe the role of interfaces an active metal oxide junction was created by decorating trisoctahedral (TOH) Au nanoparticle with nano oxides before silica encapsulation. The activity of these catalysts was tested for CO oxidation reaction. The reaction was found to be facile on these encapsulated large structured Au nanoparticles showing appreciable activity at room temperature compared to non encapsulated counterparts. Apart from preventing sintering, the improved activity is demonstrated due to the retention of morphology and thereby the active centres due to encapsulation. (C) 2016 Elsevier B.V. All rights reserved.

10aDefect sites10aEncapsulation10aHigh index facets10aMetal-oxide active perimeter10aTrisoctahedral Au nanoparticles1 aSreedhala, S.1 aMaheshwari, Shruti1 aBetsy, K., J.1 aVinod, C., P. uhttps://library.ncl.res.in/content/large-trisoctahedral-au-nanoparticles-encapsulated-inside-porous-silica-catalyses-co01427nas a2200157 4500008004100000245010500041210006900146260000800215300001000223490000700233520085200240100001801092700001701110700001801127856012401145 2018 eng d00aHighly selective aqueous phase hydrogenation of phenols over nanostructured RuO2 on MCM-41 catalysts0 aHighly selective aqueous phase hydrogenation of phenols over nan cFEB a36-430 v133 aSelective aqueous phase hydrogenation of phenol as well as its derivatives is important for the synthesis of chemical intermediates which are crucial for the manufacture of high-tonnage commodities and a multitude of value added platform chemicals. Herein, we report a facile catalyst made of highly dispersed small RuO2 nanoparticles supported on mesoporous MCM-41 using one-pot approach. The optimal 5RuO2-MCM-41 catalyst with particle size 6-8 nm showed excellent activity and selectivity in aqueous phase hydrogenation of phenol and other functionalized substrates, which are building blocks of lignin, to corresponding cyclohexanol products without any additives. These catalysts showed better stability and can be reused several times without any significant drop in activity which proves the heterogeneity of the immobilized oxide catalyst.1 aBetsy, K., J.1 aLazar, Anish1 aVinod, C., P. uhttps://library.ncl.res.in/content/highly-selective-aqueous-phase-hydrogenation-phenols-over-nanostructured-ruo2-mcm-4101610nas a2200253 4500008004100000022001400041245015100055210006900206260000800275300001000283490000800293520072400301653002801025653001401053653002001067653002701087653001301114653003001127100001701157700001801174700001801192700001801210856012801228 2018 eng d a1566-736700aRu(II)-functionalized SBA-15 as highly chemoselective, acid free and sustainable heterogeneous catalyst for acetalization of aldehydes and ketones0 aRuIIfunctionalized SBA15 as highly chemoselective acid free and  cJAN a62-660 v1043 a

Combining electron deficient Ru(II) coordination sites with organofunctionalized SBA-15, (L)Ru(Il)@SBA-15, result in a mild, neutral, water scavenger free and chemo-selective acetalization catalyst for cyclic/acyclic acetals. Vacant coordination sites of ruthenium in (L)Ru(II)@SBA-15 activates protecting groups as well as reactants simultaneously and restricts the reverse acetalization reaction. Synthesized (L)Ru(Il)@SBA-15 catalyst has been thoroughly characterized and act as competitive catalyst compared to conventional acid catalysts. (L) RuaD@SBA-15 performs high catalytic activity as well as selectivity within 20 min with high TOF. The catalyst can be recycled and reaction parameters are optimized.

10aAcetalization reactions10aAcid free10achemo-selective10aheterogeneous catalyst10aReusable10aRu(II) immobilized SBA-151 aLazar, Anish1 aBetsy, K., J.1 aVinod, C., P.1 aSingh, A., P. uhttps://library.ncl.res.in/content/ruii-functionalized-sba-15-highly-chemoselective-acid-free-and-sustainable-heterogeneous01888nas 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

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.

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-periodic01974nas a2200241 4500008004100000245014200041210006900183260000800252300001600260490000600276520110900282653001801391653001801409653002801427653003701455653002501492100001801517700001901535700001701554700001701571700001801588856012601606 2023 eng d00aPd nanoparticles supported on N-incorporated hybrid organosilica as an active and selective low-temperature phenol hydrogenation catalyst0 aPd nanoparticles supported on Nincorporated hybrid organosilica  cJUN a11500-115120 v63 a

A heterogeneous Pd-NPMO hybrid-silicacatalyst is synthesized andits application for aqueous phase selective hydrogenation of phenolto cyclohexanone at near ambient temperature (40 degrees C) and underatmospheric hydrogen pressure is demonstrated. The homogeneously distributedPd nanoparticles on N-bridged hybrid mesoporous organosilica showedremarkable activity and selectivity for cyclohexanone compared tothe unmodified Pd-SBA-15 catalyst. Control experiments strongly claimthe role of nitrogen domains in the organic framework of hybrid silicasupport in stabilizing small Pd nanoparticles and possibly modifyingthe Pd sites responsible for catalysis to activate the substrate moleculesin water. The hybrid silica catalyst was stable and reused severaltimes without any significant drop-in activity, proving the heterogeneityof the bifunctional Pd catalyst. Based on the density functional theorystudy and experimental interventions, a possible reaction mechanismfor the low-temperature phenol hydrogenation explaining the role oforganic domains in the hybrid-silica framework is proposed.

10acyclohexanone10aHybrid silica10apalladium nanoparticles10aPeriodic mesoporous organosilica10aphenol hydrogenation1 aBetsy, K., J.1 aBajpai, Priyam1 aLazar, Anish1 aVanka, Kumar1 aVinod, C., P. uhttps://library.ncl.res.in/content/pd-nanoparticles-supported-n-incorporated-hybrid-organosilica-active-and-selective-low01915nas a2200217 4500008004100000022001400041245013500055210006900190260000800259490000700267520113100274653002301405653002701428653002101455653002301476653001601499100001701515700001801532700001801550856012901568 2025 eng d a1867-388000aSelective hydrogenation of furfural to furfuryl alcohol over Pd supported on ternary oxide in aqueous medium under mild conditions0 aSelective hydrogenation of furfural to furfuryl alcohol over Pd  cAUG0 v173 a

We report palladium (Pd) supported on a mixed CuO/ZnO/Al2O3 catalyst for the synthesis of furfuryl alcohol (FA) from furfural (FF) using hydrogen under near atmospheric pressure (balloon pressure) conditions. A systematic study of various metal oxide combinations revealed that the best support for Pd nanoparticles is a CuO/ZnO/Al2O3 mixed system, which results in excellent catalytic performance. A series of control experiments highlighted the essential role of mixed Cu-Zn-Al oxide support in facilitating the adsorption and activation of FF. Our results demonstrate that under optimal conditions (40 degrees C, balloon pressure H2), the catalyst yields FF conversion exceeding 98%, with remarkable selectivity for FA reaching up to 99% with water as solvent. The catalyst exhibited almost comparable activity up to three catalytic cycles without extra catalyst treatment or reactivation with negligible Pd leaching. These findings shed insight into the design of mixed metal oxide-based support for active metal interactions in optimizing catalytic performance in furfural hydrogenation under mild conditions.

10aBiomass conversion10aFurfural hydrogenation10aFurfuryl alcohol10amixed metal oxides10aPd catalyst1 aNehra, Pooja1 aBetsy, K., J.1 aVinod, C., P. uhttps://library.ncl.res.in/content/selective-hydrogenation-furfural-furfuryl-alcohol-over-pd-supported-ternary-oxide-aqueous