01559nas a2200241   4500008004100000022001400041245013200055210006900187260007300256300001200329490000700341520067600348653002001024653001401044653002201058653001301080653002501093100002101118700002301139700001401162700001701176856012401193       2010                        eng d  a1566-736700aStructure-activity studies of dodecatungstophosphoric acid impregnated bentonite clay catalyst in hydroxyalkylation of p-cresol0 aStructureactivity studies of dodecatungstophosphoric acid impreg  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN  a942-9450 v113 a<p>Bentonite clay impregnated with dodecatungstophosphoric acid (20% DTP/BNT) showed an excellent activity, selectivity and stability [95% product yield with 94% selectivity to 2, 2'-methylenebis (4-methylphenol), DAM] for the hydroxyalkylation of p-cresol with formaldehyde at 353 K and for a mole ratio of 5. Ammonia-TPD results showed that an increase in total concentration of acid sites from 4.9 of parent bentonite to 11.6 micromoles per surface area NH(3) (mu molS(-1) NH(3)) of 20% DTP/BNT was due to a strong interaction of protons of bulk DTP with surface hydroxyl groups of BNT as evidenced by (31)P NMR studies. (C) 2010 Elsevier B.V. All rights reserved.</p>10a(31)P CPMAS NMR10aBentonite10aHydroxyalkylation10ap-Cresol10asurface modification1 aGarade, Ajit, C.1 aKshirsagar, V., S.1 aJha, Ajay1 aRode, C., V.  uhttps://library.ncl.res.in/content/structure-activity-studies-dodecatungstophosphoric-acid-impregnated-bentonite-clay-001839nas a2200181   4500008004100000022001400041245009700055210006900152260007100221300001400292490000700306520113400313100001401447700002101461700002601482700002901508856012001537       2012                        eng d  a0888-588500aMCM-41 supported phosphotungstic acid for the hydroxyalkylation of phenol to phenolphthalein0 aMCM41 supported phosphotungstic acid for the hydroxyalkylation o  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAR  a3916-39220 v513 a<p>A novel application of phosphotungstic acid, H3PW12O40 (PWA) supported on MCM-41 molecular sieve as a solid acid catalyst has been demonstrated for the synthesis of phenolphthalein by hydroxyalkylation of phenol and phthalic anhydride. PWA/MCM-41 (20%) showed the highest activity as compared to that of parent PWA and MCM-41 individually, due to the excellent dispersion of PWA on MCM-41 leading to the redistribution of Bronsted and Lewis acid sites on MCM-41. The effect of PWA loading on phthalic anhydride conversion and phenolphthalein selectivity was also studied. All these prepared catalysts were characterized by XRD, N-2 adsorption-desorption isotherm, pyridine-FTIR, and NH3-TPD. The effect of various reaction parameters, namely, mole ratios, catalyst concentration, temperature, reaction time, and percentage of PWA present in the catalysts on conversion and selectivity of products has been also investigated. The utility of 20% PWA/MCM-41 catalyst was established by its efficient activity for hydroxyalkylation of phenol and p-cresol with formaldehyde to the corresponding dihydroxydiarylmethane products.</p>1 aJha, Ajay1 aGarade, Ajit, C.1 aMirajkar, Subhash, P.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/mcm-41-supported-phosphotungstic-acid-hydroxyalkylation-phenol-phenolphthalein-001492nas a2200157   4500008004100000022001400041245012200055210006900177260011000246300001400356490000700370520078600377100001401163700002901177856012801206       2013                        eng d  a1144-054600aHighly selective liquid-phase aerobic oxidation of vanillyl alcohol to vanillin on cobalt oxide (Co3O4) nanoparticles0 aHighly selective liquidphase aerobic oxidation of vanillyl alcoh  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUN  a2669-26740 v373 a<p>Spinel Co3O4 nanoparticles prepared by solution phase method having particle size in the range of 12-20 nm exhibited excellent activity for the liquid-phase aerobic oxidation of vanillyl alcohol with 80% conversion and 98% selectivity to vanillin. Our catalyst could be reused three times without appreciable loss in activity. The catalytic activity of the Co3O4 nanoparticles was found to be similar to its homogenous precursor (cobalt acetate) and greater than the commercial Co3O4 oxide. The detailed characterization results of morphology, size and structure of the prepared Co3O4 nanoparticles obtained by XRD, FT-IR, H-2-TPR, HR-TEM and cyclic voltammetry technique were used to understand the roles of various Co species in directing the selectivity towards vanillin.</p>1 aJha, Ajay1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/highly-selective-liquid-phase-aerobic-oxidation-vanillyl-alcohol-vanillin-cobalt-oxide-001798nas a2200181   4500008004100000022001400041245010100055210006900156260007100225300001400296490000700310520108200317100001401399700002301413700002101436700002901457856013001486       2013                        eng d  a0888-588500aMagnetically separable single-site Ti-Fe3O4@MCM-41 catalyst for selective epoxidation of olefins0 aMagnetically separable singlesite TiFe3O4MCM41 catalyst for sele  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJUL  a9803-98110 v523 a<p>Magnetically separable Ti-Fe3O4@MCM-41 (Ti-MS) catalysts were prepared by postgrafting Ti with varying loading on mesoporous silica containing dispersed magnetite. The hexagonal structure of Ti-MS catalysts with a periodicity in the pores and a highly ordered hexagonal matrix was established by X-ray diffraction and transmission electron microscopy, while diffuse reflectance UV showed the isolated tetrahedral Ti species coordinated with O2-. From the Fourier transform infrared studies, the extent of Ti-O-Si linkage was found to increase with increase in Ti-loading from 1 to 5 wt %beyond which (10%), the intensity of Ti-O-Si band decreased due to the polymerization of the Ti on the silica surface. Silanol groups on the surface of silica interact with the precursor Ti((OPr)-Pr-i)(4) to give site isolated tetrahedral Ti-species responsible for complete selectivity to the epoxide in the epoxidation of cyclooctene. The magnetic property facilitated easy recovery of the catalyst for its successful eight recycles showing its stability under reaction conditions.</p>1 aJha, Ajay1 aPatil, Chetana, R.1 aGarade, Ajit, C.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/magnetically-separable-single-site-ti-fe3o4mcm-41-catalyst-selective-epoxidation-olefins-001946nas a2200229   4500008004100000022001400041245009200055210006900147260007300216300001200289490000700301520114400308653002701452653002001479653001201499653001601511100001401527700002101541700001501562700001701577856012201594       2013                        eng d  a0169-131700aMetal cation-exchanged montmorillonite clay as catalysts for hydroxyalkylation reaction0 aMetal cationexchanged montmorillonite clay as catalysts for hydr  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a141-1460 v743 a<p>Several solid acid catalysts were prepared by exchanging metal cations such as Zn2+, Fe3+ and Al3+ with montmorillonite clay. Among these, Al-montmorillonite showed the highest acidity determined by the pyridine-IR as well as NH3-TPD methods. A systematic comparison of the performance of these catalysts along with parent montmorillonite was carried out for the hydroxyalkylation of p-cresol with formaldehyde to give 2, 2'-methylenebis (4-methyl phenol) (DAM). It was found that the activity of these catalysts was in accordance with the increase in acidity of parent montmorillonite after the exchange of cations in the order of Zn2+, Fe3+ and Al3+. The selectivity pattern was also influenced by the exchanged cations. Since Al-montmorillonite showed the highest conversion of 51% with 98% selectivity to DAM, the effects of various reaction parameters, namely, mole ratio, catalyst concentration, temperature, reaction time on conversion and selectivity pattern were also studied using the same catalyst This catalyst also showed an excellent stability as evidenced by its eight times reuse. (C) 2012 Published by Elsevier B.V.</p>10aCations-exchanged clay10aMontmorillonite10aNH3-TPD10aPyridine-IR1 aJha, Ajay1 aGarade, Ajit, C.1 aShirai, M.1 aRode, C., V.  uhttps://library.ncl.res.in/content/metal-cation-exchanged-montmorillonite-clay-catalysts-hydroxyalkylation-reaction-001747nas a2200229   4500008004100000022001400041245011600055210006900171260007700240300001400317490000700331520089000338653002201228653001101250653002801261653001401289653001801303100001401321700002501335700002901360856012801389       2013                        eng d  a2192-650600aMixed Co-Mn oxide-catalysed selective aerobic oxidation of vanillyl alcohol to vanillin in base-free conditions0 aMixed CoMn oxidecatalysed selective aerobic oxidation of vanilly  aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcNOV  a1384-13920 v783 a<p>Manganese-doped cobalt mixed oxide (MnCo-MO) catalyst was prepared by a solvothermal method. The as-prepared catalyst was characterised by X-ray photoelectron spectroscopy, H-2 temperature-programmed reduction, O-2 temperature-programmed oxidation and XRD. This catalyst gave 62% conversion with 83% selectivity to vanillin in 2hours for the liquid-phase air oxidation of vanillyl alcohol without using base. Three different types of metal oxides were observed in the prepared catalyst, which could be identified as Co3O4, Mn3O4 and CoMn2O4. Among these, the tetragonal phase of CoMn2O4 was found to be more active and selective for vanillyl alcohol oxidation than Co3O4 and Mn3O4. High-resolution TEM characterisation revealed the morphology of MnCo-MO nanorods with a particle size of 10nm. Successful recycling of the catalyst was also established in this oxidation reaction.</p>10aaerobic oxidation10acobalt10aheterogeneous catalysis10amanganese10aspinel phases1 aJha, Ajay1 aPatil, Kashinath, R.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/mixed-co-mn-oxide-catalysed-selective-aerobic-oxidation-vanillyl-alcohol-vanillin-base-002066nas a2200265   4500008004100000022001400041245014100055210006900196260007300265300001200338490000800350520112500358653002201483653001501505653002001520653000801540653002101548100002001569700001401589700001801603700001801621700001501639700001701654856012901671       2014                        eng d  a0926-860X00aEffect of preparation parameters on characterization and activity of Co3O4 catalyst in liquid phase oxidation of lignin model substrates0 aEffect of preparation parameters on characterization and activit  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT  a130-1380 v4873 a<p>The nano structured spinel cobalt oxide (Co3O4) was prepared via simple co-precipitation method and its catalytic activity was evaluated for the liquid phase aerobic oxidation of lignin sub structure compounds such as veratryl alcohol. Catalyst preparation parameters influenced its morphology eventually affecting its oxidation activity. Thus, nano rod shaped CO3O4 catalyst showed 75% and 38% conversion of veratryl alcohol with complete selectivity to veratryl aldehyde in toluene and water, respectively, under base free condition. The influence of reaction conditions, such as temperature, oxygen pressure and catalyst loading was studied to obtain the optimum product yield and selectivity to the desired product. Furthermore, oxidation of various sub-structures of lignin model compounds was also studied over the same catalyst which was found to be in the following order: secondary alcohol &gt;di-substituted &gt; tri-substituted &gt; monosubstituted &gt; non-substitution. The stability of the catalyst was confirmed by its successful recycle for three times. (c) 2014 Elsevier B.V. All rights reserved.</p>10aConiferyl alcohol10aNano Co3O410aSinapyl alcohol10aTPR10aVeratryl alcohol1 aMate, Vivek, R.1 aJha, Ajay1 aJoshi, U., D.1 aPatil, K., R.1 aShirai, M.1 aRode, C., V.  uhttps://library.ncl.res.in/content/effect-preparation-parameters-characterization-and-activity-co3o4-catalyst-liquid-phase-001790nas a2200193   4500008004100000022001400041245012100055210006900176260011000245300001600355490000600371520098900377100001401366700002201380700001801402700001901420700002901439856012801468       2014                        eng d  a2046-206900aSolvothermal synthesis of mesoporous manganese oxide with enhanced catalytic activity for veratryl alcohol oxidation0 aSolvothermal synthesis of mesoporous manganese oxide with enhanc  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcAPR  a19450-194550 v43 a<p>Catalyst activities of manganese and cobalt oxides prepared by solvothermal and co-precipitation methods were studied for veratryl alcohol oxidation. Manganese oxides showed higher activity performance than that of cobalt oxides irrespective of the method of preparation. The solvothermal method yielded mesoporous manganese oxide without using any template giving mixed phases of monoclinic Mn5O8 and hausmannite Mn3O4. The mesoporous manganese oxide exhibited excellent activity for liquid phase aerobic oxidation of veratryl alcohol under base free conditions, with 90% conversion and almost complete selectivity towards veratraldehyde. The detailed characterization results on morphology, size and composition of the prepared mesoporous manganese oxide obtained by XRD, XPS, H-2-TPR, N-2 adsorption-desorption isotherms, FESEM and HR-TEM techniques were used to understand the role of morphological and structural features in enhancement of the observed catalytic activity.</p>1 aJha, Ajay1 aChandole, Tejansh1 aPandya, Rajan1 aRoh, Hyun-Seog1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/solvothermal-synthesis-mesoporous-manganese-oxide-enhanced-catalytic-activity-veratryl-002258nas a2200229   4500008004100000022001400041245010600055210006900161260011000230300001400340490000600354520135600360100001401716700002401730700002201754700002201776700001901798700002501817700002501842700002901867856013201896       2014                        eng d  a2044-475300aTriple nanocomposites of CoMn2O4, Co3O4 and reduced graphene oxide for oxidation of aromatic alcohols0 aTriple nanocomposites of CoMn2O4 Co3O4 and reduced graphene oxid  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY  a1771-17780 v43 a<p>A composite of reduced graphene oxide (RGO) with oxides of manganese and cobalt together was prepared by a solvothermal method. During synthesis, both the reduction of graphene oxide as well as the growth of nanorod shaped CoMn2O4 and Co3O4 occurred simultaneously having a crystallite size of similar to 8 nm calculated from X-ray diffraction (XRD). The as-obtained triple nanocomposite material designated as RGO-MnCoO exhibited excellent activity for the liquid phase aerobic oxidation of aromatic alcohols under base-free conditions selectively giving the corresponding aldehydes (&gt;85%). RGO loading was varied in the range of 1-10%, among which 1% RGO-MnCoO showed maximum catalytic activity enhancement of 24% as compared to the bare mixed oxide (MnCo-MO) for the oxidation of vanillyl alcohol. HR-TEM of RGO-MnCoO revealed that it was a composite material having uniform nanotubes of similar to 25 nm length and 6 nm diameter with a fringe pattern showing the (103) and (004) planes and lattice spaces of 0.26 nm and 0.22 nm, respectively, for the spinel CoMn2O4. The detailed studies on the morphology, size and composition of the as-prepared RGO-MnCoO nanocomposite by XRD, XPS, N-2-adsorption/desorption and O-2-TPD techniques were used to understand the role of RGO in the enhancement of catalytic activity for oxidation reaction.</p>1 aJha, Ajay1 aMhamane, Dattakumar1 aSuryawanshi, Anil1 aJoshi, Sameer, M.1 aShaikh, Parvez1 aBiradar, Narayan, S.1 aOgale, Satishchandra1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/triple-nanocomposites-comn2o4-co3o4-and-reduced-graphene-oxide-oxidation-aromatic-alcohols-001811nas a2200217   4500008004100000022001400041245008200055210006900137260011000206300001400316490000600330520101100336100001401347700002001361700001701381700001801398700001801416700002901434700001901463856011101482       2015                        eng d  a2044-475300aHydrogen production by the water-gas shift reaction using CuNi/Fe2O3 catalyst0 aHydrogen production by the watergas shift reaction using CuNiFe2  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB  a2752-27600 v53 a<p>Incorporation of both Cu and Ni together into the crystalline lattice of Fe2O3 results in a significant increase in the catalytic activity and also suppresses the methanation reaction in the high-temperature water-gas shift (HT-WGS) reaction. CuNi/Fe2O3 exhibited the highest CO conversion with negligible CH4 selectivity at the extremely high GHSV of 101 000 h(-1) (X-CO = 85% at 400 degrees C). The high activity of CuNi/Fe2O3 catalyst is mainly due to the increase in the lattice strain and the decrease in the binding energy of lattice oxygen. In addition, X-ray photoelectron spectroscopy (XPS) results provide direct evidence for the formation of surface CuNi alloy, which plays a critical role in suppressing the methanation reaction. The detailed characterization by powder X-ray diffraction (XRD), XPS, BET, and H-2 temperature-programmed reduction (TPR) techniques was used to understand the role of dopants on host iron oxides in the enhancement of catalytic activity for HT-WGS reaction.</p>1 aJha, Ajay1 aJeong, Dae-Woon1 aShim, Jae-Oh1 aJang, Won-Jun1 aLee, Yeol-Lim1 aRode, Chandrashekhar, V.1 aRoh, Hyun-Seog  uhttps://library.ncl.res.in/content/hydrogen-production-water-gas-shift-reaction-using-cunife2o3-catalyst-001786nas a2200193   4500008004100000022001400041245008700055210006900142260011000211300001400321490000600335520103100341100001401372700002001386700001801406700002901424700001901453856012001472       2015                        eng d  a2046-206900aMesoporous NiCu-CeO2 oxide catalysts for high-temperature water-gas shift reaction0 aMesoporous NiCuCeO2 oxide catalysts for hightemperature watergas  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcNOV  a1430-14370 v53 a<p>Mesoporous NiCu-CeO2 oxide catalysts were synthesized by using the evaporation-induced self-assembly method applied to the high-temperature, water-gas shift reaction (HT-WGS) between 350 to 550 degrees C. Nickel and copper loadings on mesoporous ceria were tailored to achieve high activity and selectivity by suppressing methane formation in HT-WGS. Among the prepared catalysts, NiCu(1 : 4)-CeO2 exhibited the highest selectivity to CO2 and H-2 with 85% CO conversion at a very high GHSV of 83 665 h(-1). The higher activity of the catalysts was due to the mesoporous architecture, which provides more accessible active sites for the WGS reaction. Powder X-ray diffraction (XRD), small angle X-ray scattering (SAXS), N-2-adsorption/desorption isotherm, high-resolution transmission electron microscopy (HR-TEM), and H-2-temperature-programmed reduction (TPR) techniques were used to understand the role of mesoporosity and bimetallic composition of various NiCu-CeO2 oxides in enhancing catalytic activity for HT-WGS.</p>1 aJha, Ajay1 aJeong, Dae-Woon1 aJang, Won-Jun1 aRode, Chandrashekhar, V.1 aRoh, Hyun-Seog  uhttps://library.ncl.res.in/content/mesoporous-nicu-ceo2-oxide-catalysts-high-temperature-water-gas-shift-reaction-001848nas a2200289   4500008004100000022001400041245013100055210006900186260007700255300001400332490000700346520079400353653002301147653001301170653001401183653002401197653002201221100001401243700002101257700002301278700002401301700002601325700002501351700002101376700002901397856013201426       2015                        eng d  a2192-650600aReduced graphene oxide composite with oxidizable manganese/cobalt mixed oxide for p-cresol oxidation by using molecular oxygen0 aReduced graphene oxide composite with oxidizable manganesecobalt  aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUL  a1164-11690 v803 a<p>A composite of graphene oxide (GO) with mixed oxide (MnCo) was prepared by using a solvothermal method. During the synthesis, both the reduction of GO and growth of metal oxides took place simultaneously. The as-prepared composite material was highly selective for the liquid-phase oxidation of p-cresol to form p-hydroxybenzaldehyde in 71% yield within 1h. The composite material was characterised by SEM, X-ray photoelectron spectroscopy, high-resolution TEM and cyclic voltammetry (CV). A CV study revealed that the increase in the redox potential of the mixed oxide after being supported on GO, led to its higher activity of the catalyst for the oxidation reaction. The stability of the catalyst under the reaction conditions was studied by its successful reuse in three cycles.</p>10acyclic voltammetry10agraphene10aOxidation10asupported catalysts10atransition metals1 aJha, Ajay1 aPatil, Sagar, H.1 aSolanki, Bhanu, P.1 aRibeiro, Ana, P. C.1 aCastro, Carlos, A. N.1 aPatil, Kashinath, R.1 aCoronas, Alberto1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/reduced-graphene-oxide-composite-oxidizable-manganesecobalt-mixed-oxide-p-cresol-oxidation-001904nas a2200289   4500008004100000022001400041245012400055210006900179260007300248300001000321490000800331520090700339653000901246653001501255653001901270653002101289653002001310100001401330700002001344700001801364700001801382700001701400700002001417700002901437700001901466856012901485       2016                        eng d  a0926-860X00aChromium free high temperature water-gas shift catalyst for the production of hydrogen from waste derived synthesis gas0 aChromium free high temperature watergas shift catalyst for the p  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUL  a21-310 v5223 a<p>A comparative study between monometallic (Me-CeO2, Me =Zn, Cu, Fe and Co) and Ni-doped bimetallic (Me-Ni-CeO2) catalysts has been performed in the high temperature water-gas shift (HT-WGS) reaction using waste derived synthesis gas. Experimental results revealed that Me-Ni-CeO2 exhibited higher catalytic performance than simple Me-CeO2 catalysts. Within the Me-Ni-CeO2 series, Co-Ni-CeO2 exhibited excellent and stable catalytic performance (CO conversion &gt; 90%) at a very high GHSV of 143,000 h(-1). The existence of high" concentration of Ce3+ ions and oxygen vacancies on the catalyst surface were responsible for the increased WGS activity of Co-Ni-CeO2. In addition, Co-Ni-CeO2 maintains a stable performance for 50 h. However, commercial Fe2O3-Cr2O3 catalyst showed a steep decline from their initial CO conversion values 15-10% within 5 h. (C) 2016 Elsevier B.V. All rights reserved.</p>10aCeO210aCo-Ni-CeO210aLattice strain10aoxygen vacancies10aWater-gas shift1 aJha, Ajay1 aJeong, Dae-Woon1 aLee, Yeol-Lim1 aJang, Won-Jun1 aShim, Jae-Oh1 aJeon, Kyung-Won1 aRode, Chandrashekhar, V.1 aRoh, Hyun-Seog  uhttps://library.ncl.res.in/content/chromium-free-high-temperature-water-gas-shift-catalyst-production-hydrogen-waste-derived01902nas a2200301   4500008004100000022001400041245013000055210006900185260000900254300001000263490000800273520089400281653002501175653001201200653003701212653002501249653001401274653003201288100001801320700001401338700001801352700001701370700002901387700002001416700002001436700001901456856012501475       2018                        eng d  a0926-860X00aEffect of alkali and alkaline earth metal on Co/CeO2 catalyst for the water gas shift reaction of waste derived synthesis gas0 aEffect of alkali and alkaline earth metal on CoCeO2 catalyst for  cFEB   a63-700 v5513 a<p>We prepared a series of alkali (Na and K) and alkaline earth metal (Ca and Ba) promoted Co/CeO2 catalysts to investigate the effect of the promoter on the catalytic performance of the catalyst in the high-temperature water gas shift (WGS) reaction of waste derived synthesis gas. Interestingly, alkali metal promoted catalysts deactivated rapidly compared to alkaline earth metal promoted catalysts. Alkaline earth metal promoted catalysts showed relatively higher stability (&gt;50 h) even at a very high gas hourly space velocity of 143,000 h(-1). X-ray diffraction (XRD) and transmission electron microscopy (TEM) results reveal that the higher stability of the alkaline earth metal promoted catalysts was due to the strong resistance to sintering, showing a relatively small crystallite size of metallic cobalt compared to the alkali metal promoted catalysts after WGS reaction.</p>10aAlkaline earth metal10aCo/CeO210aHigh temperature water-gas shift10aSintering resistance10astability10aWaste derived synthesis gas1 aLee, Yeol-Lim1 aJha, Ajay1 aJang, Won-Jun1 aShim, Jae-Oh1 aRode, Chandrashekhar, V.1 aJeon, Byong-Hun1 aBae, Jong, Wook1 aRoh, Hyun-Seog  uhttps://library.ncl.res.in/content/effect-alkali-and-alkaline-earth-metal-coceo2-catalyst-water-gas-shift-reaction-waste01919nas a2200193   4500008004100000022001400041245008900055210006900144260000800213300001600221490000800237520125000245100001401495700002301509700001901532700002901551700002501580856012001605       2021                        eng d  a1932-744700aPhotoactive anthraquinone-based host-guest assembly for long-lived charge separation0 aPhotoactive anthraquinonebased hostguest assembly for longlived   cMAY  a10891-109000 v1253 aPorous 2D covalent organic frameworks (COF) that are assembled axially through weak p-stacking interactions can provide reticular charge transport channels while playing host to kinetically stabilized reactive molecular redox states. Here we demonstrate a host-guest supramolecular charge transfer (CT) assembly using photoactive anthraquinone-based COF as an acceptor while incarcerating the electron donor N,N-dimethylaniline (DMA) inside it. Employing femtosecond broadband transient absorption spectroscopy in combination with electron paramagnetic resonance (EPR) studies, we show that the CT occurs rapidly within <110 fs after photoexcitation, subsequently leading to long-lived charge separation with 13% quantum efficiency at room temperature. The photoinduced EPR signature of the long-lived confined DMA cation radical confirms the disparate regions of charge localization while H-1-C-13 correlation experiments using solid-state NMR spectroscopy enumerate the packing of the amines inside the host-guest COF assembly. Our work demonstrates the potency of charge transport pathways in supramolecular assemblies for efficient charge separation which if optimally tuned should pave the way for COF-based photocatalytic reaction centers.1 aJha, Ajay1 aMote, Kaustubh, R.1 aChandra, Suman1 aMadhu, Perunthiruthy, K.1 aDasgupta, Jyotishman  uhttps://library.ncl.res.in/content/photoactive-anthraquinone-based-host-guest-assembly-long-lived-charge-separation