01934nas a2200277 4500008004100000022001400041245010500055210006900160260011000229300001600339490000600355520091900361100001901280700002501299700001601324700001801340700002201358700002701380700002301407700001701430700001701447700001701464700002001481700002401501856013101525 2015 eng d a2046-206900aMesoporous TUD-1 supported indium oxide nanoparticles for epoxidation of styrene using molecular O-20 aMesoporous TUD1 supported indium oxide nanoparticles for epoxida aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY a46850-468600 v53 a

Activation of molecular O-2 by metal or metal oxide nanoparticles is an area of recent research interest. In this work, for the first time, we report that indium oxide nanoparticles of <3 nm size dispersed on mesoporous silica (TUD-1) can activate molecular O-2 and produce styrene epoxide with a selectivity of 60% and styrene conversion around 25% under mild conditions. It is found that neither indium oxide nor TUD-1 themselves respond to the styrene epoxidation reaction. The computational studies provide evidence that an oxygen molecule is highly polarized when it is located near the interface of both surfaces. The kinetic study shows that the reaction is of pseudo-first order and that the activation energy for styrene conversion is 12.138 kJ mol(-1). The catalysts are recyclable for up to four regeneration steps, with the styrene conversion and styrene epoxide selectivity almost unchanged.

1 aRahman, Sumbul1 aFarooqui, Saleem, A.1 aRai, Aditya1 aKumar, Rawesh1 aSantra, Chiranjit1 aPrabhakaran, Vinod, C.1 aBhadu, Gopala, Ram1 aSen, Debasis1 aMazumder, S.1 aMaity, Sudip1 aSinha, Anil, K.1 aChowdhury, Biswajit uhttps://library.ncl.res.in/content/mesoporous-tud-1-supported-indium-oxide-nanoparticles-epoxidation-styrene-using-molecular-002053nas a2200217 4500008004100000245014100041210006900182260000800251300001000259490000800269520122100277653004101498653001901539653003601558653003501594100001701629700001401646700002701660700001801687856013001705 2017 eng d00aHeterogeneous route for transfer hydrogenation reactions of ketones using Ru(II)Cymene complex over modified benzene-organosilica (PMOB)0 aHeterogeneous route for transfer hydrogenation reactions of keto cOCT a66-740 v4403 aAn inorganic-organic hybrid catalyst, Ru(II)Cym@PMOB, was synthesized by anchoring of [Ru(II)Cl-2(Pcymene)](2) complex which is derived from a reaction between hydrated ruthenium(III) trichloride and ocphellandrene over aminofunctionalized benzene-organosilica (PMOB). In the context of secondary alcohol synthesis from ketones, transfer hydrogenation (TH) reactions are convenient compared to conventional hydrogenation reactions owing to its lower activation energy and ambient pressure and mild temperature reaction" conditions. The synthesized catalysts were characterized by CHN analysis, XRD, ICP, N-2-sorption analysis, TG & DTA, FFIR,C-13 & 29Si solid NMR, UV-vis, TEM, SEM and XPS. The catalytic activities of neat [Ru(II)C-12(p-cymene)]2 complex and Ru(II)Cym@PMOB were evaluated in transfer hydrogenation (TH) of ketones (-97%) and compared with conventional hydrogenation reactions (-5%) where molecular H-2 was used. The results showed Ru(II)Cym@PMOB as highly active catalyst towards transfer hydrogenation (TH) reaction of acetophenones compared to neat [Ru(II)Cl-2(p-cymene)(12) complex. The heterogeneity of Ru(II)Cym@PMOB was confirmed by Sheldon's test. (C) 2017 Elsevier B.V. All rights reserved.10aConventional Hydrogenation Reactions10aRu(II)Cym@PMOB10aTransfer Hydrogenation Reaction10a[Ru(II)Cl2(p-cymene)]2 complex1 aLazar, Anish1 aSilpa, S.1 aPrabhakaran, Vinod, C.1 aSingh, A., P. uhttps://library.ncl.res.in/content/heterogeneous-route-transfer-hydrogenation-reactions-ketones-using-ruiicymene-complex-over01654nas a2200253 4500008004100000022001400041245016200055210006900217260000900286300001400295490000600309520073200315653003201047653001401079653001801093653003401111653002001145100002701165700002701192700001701219700001701236700002401253856012301277 2019 eng d a2365-654900aPalladium impregnated amine Co-condensed hexagonal mesoporous silica: a novel catalyst in tailoring suzuki and heck coupling reactions in base free condition0 aPalladium impregnated amine Cocondensed hexagonal mesoporous sil cAPR  a3823-38320 v43 a

Palladium impregnated amine co-condensed hexagonal mesoporous silicas (HMS-X) were synthesized (sol-gel process) using different amines (Ethylene diamine and pyridine) of various concentrations (0.25 equiv. and 2 equiv.). The effect of amine concentration on the local structure of hexagonal mesoporous silica was studied. The catalyst shows excellent catalytic activity and high TOF towards both Suzuki and Heck coupling reactions without using any base in reaction medium with the solvent DMF:water in (1:1) ratio. The catalyst was reused and it was recyclable up to three cycle without any appreciable loss of activity and the kinetics of the reaction varying different parameters also have been studied thoroughly.

10aAmine functionalized silica10aBase free10aHeck reaction10aPalladium supported catalysts10aSuzuki reaction1 aDas, Prangya, Paramita1 aPrabhakaran, Vinod, C.1 aNanda, Samik1 aSen, Debasis1 aChowdhury, Biswajit uhttps://library.ncl.res.in/content/palladium-impregnated-amine-co-condensed-hexagonal-mesoporous-silica-novel-catalyst02452nas a2200229 4500008004100000022001400041245011000055210006900165260000800234300001600242490000700258520164600265100001901911700001701930700002501947700002201972700002001994700002602014700002702040700002902067856012602096 2022 eng d a2050-748800aHeterostructure from heteromixture: unusual OER activity of FeP and CoP nanostructures on physical mixing0 aHeterostructure from heteromixture unusual OER activity of FeP a cNOV a22354-223620 v103 a

Heterointerfaces generated by inter-domain interactions on a nanoscale play a critical role in altering the activity of an electrocatalyst towards an electrochemical process. Heterointerfaces affect the surface characteristics, electronic structure, and physicochemical properties of a nanomaterial. Herein, we report an FeP-CoP heterostructure prepared by simple physical mixing of FeP and CoP nanostructures showing a remarkable performance towards water oxidation in comparison to their individual monometallic phosphides. FeP mixed with 20 wt% CoP shows a low overpotential (eta(10)) of 220 mV as compared to FeP (eta(10), 325 mV). Furthermore, a high current density of 1.37 A cm(-2) and mass activity of 18 987 A g(M)(-1) were also achieved at 500 mV overpotential in 1.0 M KOH. The physical mixture shows immense stability for 200 h to achieve a high current density of 200 mA cm(-2). Meanwhile the potentiostatic performance of FeP at 200 mA cm(-2) decreases to an extent of 50% in 40 h. A full cell arrangement employing this catalyst as the anode material requires 1.56 V to attain a current density of 10 mA cm(-2). Various characterization techniques, control experiments and theoretical studies indicate that the formation of heterointerfaces between the nano-domains of FeP and CoP results in charge transfer between Fe and Co metal sites. In addition, an oxygenated surface at the metal phosphide interface favours the sorption kinetics of intermediates involved in the reaction leading to low energy barriers in the potential determining and other steps, thus showing improved performance towards water oxidation.

1 aBhutani, Divya1 aMaity, Sisir1 aChaturvedi, Shashank1 aChalapathi, Divya1 aWaghmare, Umesh1 aNarayana, Chandrabhas1 aPrabhakaran, Vinod, C.1 aMuthusamy, Eswaramoorthy uhttps://library.ncl.res.in/content/heterostructure-heteromixture-unusual-oer-activity-fep-and-cop-nanostructures-physical