02423nas a2200217 4500008004100000022001400041245015800055210006900213260000800282300001200290490000800302520164400310653002401954653002801978653001302006653002402019100001702043700001802060700001802078856010902096 2017 eng d a1387-181100aExploration of amination reactions on highly extendable active sites of Pd(II)-3-allylsalicylaldiminophenol (ASIP) complex over thiofunctionalized SBA-150 aExploration of amination reactions on highly extendable active s cAPR a173-1810 v2423 a

An effective and impressive heterogeneous catalyst, Pd(II)-3-allylsalicylaldiminophenol-SBA-15, dubbed as Pd(II)ASIP@SBA-15, for amination reactions of aryl halides to synthesize secondary amines (2), has been synthesized and characterized. Pd(II)ASIP@SBA-15 has been synthesized by the covalent anchoring of 3-allylsalicylaldehyde over thiofunctionalized SBA-15, then further reaction with 2-aminophenol, followed by metallation process by using Pd(11)(OAc)(2). A specifically designed cheap and easily available organic ligand, 3-allylsalicylaldiminophenol (ASIP), was synthesized from 3-allylsalicylaldehyde and 2-aminophenol. Using this, the synthesis of Pd(II)ASIP@SBA-15 was carried out whereby the ligand providing an active co-ordination or chelating sites for palladium metal. This strategy helped in exposing the Pd(11)ASIP active sites from surface to channels of SBA-15 support during the reactions. The synthesized catalyst were characterized by CHN analysis, PXRD, Nitrogen sorption analyses, TG & DTA, FTIR, C-13 and Si-29 CPMASS NMR spectra, XPS, UV-Visible, SEM, EDAX and TEM. Pd(II)ASIP@SBA-15 catalyst was screened in heterogeneous amination reactions of aryl halides to produce N-aryl derivatives or secondary amines with high catalytic activity as revealed by turn over frequency (TOF) calculations. To explore the heterogeneous nature of catalysts, amination reactions were carried with neat Pd(II)ASIP complex and Pd(11)(OAc)(2) catalysts. The catalyst was recycled several times without much loss of activity and Sheldon hot filtration test has been performed. (C) 2017 Elsevier Inc. All rights reserved.

10aAmination Reactions10aheterogeneous catalysis10aReusable10aSupported catalysis1 aLazar, Anish1 aVinod, C., P.1 aSingh, A., P. uhttps://library.ncl.res.in/content/exploration-amination-reactions-highly-extendable-active-sites-pdii-301935nas a2200205 4500008004100000245010300041210006900144260000800213300001000221490000800231520124200239100002501481700001301506700001601519700001501535700001801550700002001568700001601588856012501604 2018 eng d00a Enhanced selectivity of 3-D ordered macroporous Pt/Al2O3 catalysts in nitrites removal from water0 aEnhanced selectivity of 3D ordered macroporous PtAl2O3 catalysts cAUG a26-320 v5643 aTailored macroporous mesoporous alumina supports have been successfully prepared using a single hard templating approach. Pt nanoparticles, showing similar physico-chemical properties, were homogeneously dispersed throughout the different alumina frameworks as catalytic active phase for drinking water treatment. We demonstrated that careful modification of pore properties of the catalyst (size and connectivity) by pseudomorphic transformation can strongly modulate the reaction rate and selectivity through the limited access to Pt active sites within the alumina porous particles. Specifically, 3-D Ordered Macroporous Pt-Al2O3 catalysts with a high degree of interconnectivity yield to superior catalytic properties (enhanced activity and selectivity) over pure mesoporous counterparts in the hydrogenation of nitrites in water. We found that large pores (240 nm) interconnected with windows (110 nm) alleviate mass transfer limitations and clearly improve NZ selectivity. The findings of this study further suggest the possibility of engineering the pore architecture of the support to fine tune the selectivity for a particular reaction rather than investigating more on tuning the properties of the costly active metallic phase.1 aSekhar, A., C. Sunil1 aZaki, A.1 aTroncea, S.1 aCasale, S.1 aVinod, C., P.1 aDacquin, J., P.1 aGranger, P. uhttps://library.ncl.res.in/content/enhanced-selectivity-3-d-ordered-macroporous-ptal2o3-catalysts-nitrites-removal-water01971nas a2200253 4500008004100000022001400041245017400055210006900229260000800298300001100306490000700317520104800324653002201372653002101394653002001415653002001435653002501455100001801480700002101498700002101519700002701540700001801567856013201585 2020 eng d a2352-940700aEngineering pore morphology using silica template route over mesoporous cobalt oxide and its implications in atmospheric pressure carbon dioxide hydrogenation to olefins0 aEngineering pore morphology using silica template route over mes cJUN a1005860 v193 a

Highly ordered mesoporous cobalt oxides (denoted as m-Co-KIT-6 and m-Co-SBA-15) with three dimensional and two dimensional pore morphology respectively have been synthesized using 3D KIT-6, and 2D SBA-15 as silica template via nanocasting route. CO2 hydrogenation activity was evaluated for these mesoporous materials under atmospheric pressure conditions. In comparison to nanoparticles of cobalt oxide (Co3O4-nano), mesoporous catalysts showed excellent activity for CO2 hydrogenation due to their higher number of exposed active sites and lower mass diffusion limitations. The ordered mesoporous structure of Co3O4 catalysts favored the chain growth of carbon atoms for the production of C2+ hydrocarbons while Co3O4 nanoparticles showed strong selectivity toward CH4. High selectivity for C2+ (similar to 25%) was obtained for both m-Co-KIT-6 and m-Co-SBA-15 catalysts at 320 degrees C. In addition, the 3D pore structure of m-Co-KIT-6 catalyst exclusively formed more olefins (54.9%) fraction. (C) 2020 Published by Elsevier Ltd.

10aCO2 hydrogenation10aMesoporous CO3O410aOlefin fraction10aPore morphology10aSilica hard template1 aGupta, Sharad1 aCiotonea, Carmen1 aRoyer, Sebastien1 aDacquin, Jean-Philippe1 aVinod, C., P. uhttps://library.ncl.res.in/content/engineering-pore-morphology-using-silica-template-route-over-mesoporous-cobalt-oxide-and-its01380nas a2200169 4500008004100000022001400041245011100055210006900166260000800235300001600243490000800259520076200267100001801029700002101047700001801068856012401086 2024 eng d a1932-744700aExploring the CeO2 support morphology for the carbon dioxide hydrogenation reaction using nickel catalysts0 aExploring the CeO2 support morphology for the carbon dioxide hyd cOCT a18782-187920 v1283 a

The catalytic activity and stability are examined for the hydrogenation of carbon dioxide under atmospheric pressure over 2 wt % Ni/CeO2 nanorods (2Ni-CeNRs), nanocubes (2Ni-CeNCs), and nanopolyhedra (2Ni-CeNPs). The 2Ni-CeNR catalysts display excellent catalytic activity and higher stability compared with 2Ni-CeNC and 2Ni-CeNP catalysts. A comprehensive understanding of the surface atomic and electronic structure versus activity has been derived using high-resolution electron microscopy and spectroscopy techniques. High metal dispersion, strong metal-support interaction (SMSI) effect and abundant oxygen vacancies are deduced to play a crucial role in determining the catalytic activity and selectivity of the CO2 hydrogenation reaction.

1 aGupta, Sharad1 aJagtap, Anuradha1 aVinod, C., P. uhttps://library.ncl.res.in/content/exploring-ceo2-support-morphology-carbon-dioxide-hydrogenation-reaction-using-nickel02034nas a2200181 4500008004100000022001400041245011800055210006900173260000800242300001200250490000700262520139000269100001501659700001901674700001801693700001801711856012301729 2025 eng d a0022-246100aEnhanced light-matter interaction in gas nitridation-derived TiNx thin films for potential plasmonic applications0 aEnhanced lightmatter interaction in gas nitridationderived TiNx  cJAN a178-1940 v603 a

Titanium nitride is a substitute material exhibiting improved opto-electrical characteristics suitable for plasmonic purposes with adjustable attributes. In this study, we have embraced an innovative methodology for the fabrication of titanium nitride thin coatings via the nitridation of RF magnetron-sputtered titanium metallic films for surface plasmon resonance utilisation. The augmented electrical and optical features of TiN thin coatings prepared through the nitridation procedure are reported for the first time. The metallic coatings underwent gas nitridation at diverse temperatures within the range of 450-600 degrees C. The titanium nitride phase evolution in the coatings was corroborated by x-ray diffraction and x-ray photoelectron spectroscopy examinations. The dielectric function is deduced from reflection spectra through Drude-Lorentz model fitting, and the manifestation of surface plasmon excitation in the visible region was confirmed by correlating with carrier concentration assessments and by ensuring the required negative permittivity in the region. The red shift of screened plasma wavelength was observed with the nitridation temperature, and the same is varied in the wavelength range 400-700 nm. Ultimately, surface plasmons were excited in coatings with optimised thickness using Kretschmann configuration in wavelength interrogation mode.

1 aTony, Liya1 aSelvam, Packia1 aVinod, C., P.1 aPotty, S., N. uhttps://library.ncl.res.in/content/enhanced-light-matter-interaction-gas-nitridation-derived-tinx-thin-films-potential02307nas a2200337 4500008004100000022001400041245015300055210006900208260000900277300001100286490000800297520117300305653002001478653002401498653002201522653000901544653002301553653001201576653002501588653004301613100002401656700001801680700001901698700002001717700002501737700001701762700001801779700002501797700001801822856012901840 2025 eng d a1385-894700aExploring the electronic modulation in controlling the activity and selectivity of Ni-Au-In based catalyst in atmospheric pressure CO2 hydrogenation0 aExploring the electronic modulation in controlling the activity  cSEP  a1659210 v5203 a

Nickel-based catalysts are widely used for the hydrogenation of CO2 but encounter stability challenges during prolonged reactions and at elevated temperatures. At atmospheric pressure, nickel primarily promotes methane formation in CO2 hydrogenation reactions. In this work, we demonstrate that the stability and activity of nickel can be significantly enhanced through gold (Au) modification. Furthermore, we achieve a near-complete selectivity switch from methane to CO by incorporating indium (In), mediated through the formation of Au-In alloy. This catalyst exhibits excellent CO2 conversion and CO selectivity at relatively lower temperatures (400 degrees C), addressing a major bottleneck in the Reverse Water-Gas Shifts (RWGS) reaction. XPS studies demonstrate an interesting electron transfer mechanism facilitated by gold, which involves the formation of electronrich Au species (Au delta-) and the development of Au-In alloys. This process improves the reducibility of nickel oxide while allowing a fraction of nickel to remain in its metallic form, managing a facile hydrogenation process and regulating the shift in selectivity from CH4 to CO.

10aAlloy formation10aBimetallic catalyst10aCO2 hydrogenation10aRWGS10aSelectivity switch10asynergy10aTrimetallic catalyst10aXPS (X-ray photoelectron spectroscopy)1 aBajpai, Jyotsna, P.1 aGupta, Sharad1 aGoud, Devender1 aDeka, Diku, Raj1 aJagtap, Anuradha, V.1 aKumar, Pawan1 aAhamed, Momin1 aPeter, Sebastian, C.1 aVinod, C., P. uhttps://library.ncl.res.in/content/exploring-electronic-modulation-controlling-activity-and-selectivity-ni-au-based-catalyst