01871nas a2200193 4500008004100000022001400041245013000055210006900185260011000254300001200364490000700376520105800383100002301441700002301464700002201487700002301509700001801532856012701550 2015 eng d a1463-926200aHeterogeneously catalyzed strategies for the deconstruction of high density polyethylene: plastic waste valorisation to fuels0 aHeterogeneously catalyzed strategies for the deconstruction of h aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcOCT a146-1560 v173 a

The plastic industry generates enormous quantities of plastics at projected rates (both production and consumption) which can significantly threaten our environment in terms of plastic waste generation. High density polyethylene (HDPE) is one of the main fractions of municipal solid waste which has a remarkable potential to be valorised into fuels (e.g. bio-oils). Catalytic degradation is an innovative alternative process to transform plastic waste into such value added products. This mini review was aimed to discuss the most relevant and recent catalysts developed for the catalytic degradation of HDPE including metal oxides, sulphated metal oxides, zeolites, nanostructured zeolites, molecular sieves, fluid catalytic cracking (FCC) catalysts, metal carbonates and mesoporous materials for the production of chemicals and fuels (e.g. diesel and gasolines). Activities and selectivities as well as important effects of additives, particle size, catalyst to polymer ratios and also recent approaches for waste management will be discussed.

1 aBurange, Anand, S.1 aGawande, Manoj, B.1 aLam, Frank, L. Y.1 aJayaram, Radha, V.1 aLuque, Rafael uhttps://library.ncl.res.in/content/heterogeneously-catalyzed-strategies-deconstruction-high-density-polyethylene-plastic-001965nas a2200169 4500008004100000245012400041210007000165260000800235300001600243490000600259520129900265100002301564700001901587700002401606700003001630856013501660 2016 eng d00aPalladium supported on fluorite structured redox CeZrO4-δ for heterogeneous suzuki coupling in water: a green protocol0 aPalladium supported on fluorite structured redox CeZrO4δ for het cJUL a2673–26810 v13 a

Pd on redox CeZrO4-δ catalysts was prepared, characterized and their activity was evaluated for Suzuki coupling reaction in water under reflux condition. Fresh and reduced form of 5 % Pd (R−Pd5) on CeZrO4-δ catalyst exhibited 100 % conversion in 2.5 and 1 h, respectively. R−Pd5 shows significant activity for wide range of substrate compatibility and for less reactive aryl bromides too. The mechanistic investigations proved the important role of redox CeZrO4-δ support on the catalytic activity. It was observed that the presence of oxygen vacancy along with Ce3+ enhances the activity. 1 wt % Pd photodeposited on pre-reduced CeZrO4-δ support requires a mere 20 min. for 100 % conversion of Suzuki coupling. Effect of metal dispersion and particle size on catalytic activity is also discussed. High Pd dispersion with small particle size (4±1 nm), particle size preservation after reaction, strong metal-support interaction and no leaching fully suggest the heterogeneous mechanism is operative for Suzuki coupling on 1 wt % Pd photodeposited on reduced CeZrO4-δ support. Present work hints the possibility of achieving high conversion for Suzuki reaction with very small amount of Pd through better dispersion by taking advantage of redox support and in water.

1 aBurange, Anand, S.1 aShukla, Rakesh1 aTyagi, Avesh, Kumar1 aGopinath, Chinnakonda, S. uhttps://library.ncl.res.in/content/palladium-supported-fluorite-structured-redox-cezro4-%CE%B4-heterogeneous-suzuki-coupling-water01570nas a2200169 4500008004100000245009400041210007000135260000800205490000800213520093500221100002301156700002801179700002601207700001901233700002101252856012701273 2018 eng d00aRole of palladium crystallite size on CO oxidation over CeZrO 4-δ supported Pd catalysts0 aRole of palladium crystallite size on CO oxidation over CeZrO 4δ cAUG0 v4553 aPhotodeposited palladium on nanocrystalline CeZrO 4-δ support was evaluated for CO oxidation, as a function of particle size and pre-treatment. All the catalysts were well characterized by XRD, SEM, EDX, TEM, CO chemi-sorption and Raman spectroscopy. It was observed that change in photodeposition time alters the average crystallite size of Pd, and the same was confirmed by CO chemisorption. 7 nm average crystallite size of Pd exhibited excellent catalytic activity for CO oxidation. In order to understand the effect of support and metal-support interaction, 1 wt% Pd was deposited deliberately onto reduced and oxidized CeZrO 4-δ support. The reduced support with anionic vacancies and more Ce 3+ species exhibited an improvement in CO oxidation at onset temperature. Detailed analysis shows that Pd-deposition occurs preferentially at oxygen-vacancy sites and subsequent metal-support interaction influences the catalysis.1 aBurange, Anand, S.1 aReddy, Kasala, Prabhakr1 aGopinath, Chinnakonda1 aShukla, Rakesh1 aTyagi, Avesh, K. uhttps://library.ncl.res.in/content/role-palladium-crystallite-size-co-oxidation-over-cezro-4-%CE%B4-supported-pd-catalysts01830nas a2200133 4500008004100000245006800041210006700109260004100176300001200217520131900229100002301548700002601571856009901597 2020 eng d00aShape-controlled metal oxides for selective catalytic oxidation0 aShapecontrolled metal oxides for selective catalytic oxidation bPublisher: American Chemical Society a291-3183 a

Some of industrial processes involve selective oxidation reactions that include the use of corrosive and nonbenign oxidants and solvents. Many metal oxide-based catalysts have been reported for selective oxidation processes, and they exhibit a range of activities compared to homogeneous protocols and current practices. To bridge the gap between homogeneous and heterogeneous catalysis in terms of activity and selectivity and move toward green oxidation processes, this chapter discusses the shape-controlled synthesis of a selected range of metal oxides and their applications in selective catalytic oxidation reactions. This chapter also discusses some of the interesting micro- and nanostructured materials used in these reactions, as well as the roles of exposed predominant facets, defects, and other features and their effects on catalysis. Oxides of Mn, Co, Ce, Cu, Fe, La, and some combinations thereof are presented. Chemical reactions such as the selective oxidations of alcohol, ethyl benzene, styrene, xylene, and 5-hydroxymethylfurfural and the preferential oxidation of CO are also discussed.

1 aBurange, Anand, S.1 aGopinath, Chinnakonda uhttps://library.ncl.res.in/content/shape-controlled-metal-oxides-selective-catalytic-oxidation01521nas a2200217 4500008004100000245013400041210006900175260000800244300001100252490000700263520073000270653002001000653002001020653001701040653002801057653001701085653001601102100002301118700003001141856013201171 2021 eng d00aCatalytic applications of hydrotalcite and related materials in multi -component reactions: concepts, challenges and future scope0 aCatalytic applications of hydrotalcite and related materials in  cSEP a1004580 v223 aHydrotalcites (HTs) are the potential substitute to conventional base catalysts. HTs are useful in efficient syntheses of various heterocycles, such as chromenes, pyrans, pyrazoles, triazoles, using multi-component reactions. This review focuses on the chemistry of HTs and particularly hydrotalcites and related materials in the synthesis of heterocycles. The effects of preparation method and, physico-chemical parameters, such as calcination, molar ratio of metals, role of intercalated ions, surface area, on the catalytic activities are discussed. Along with technical aspects, this review also unlocks various untouched areas in developing sustainable catalyst for syntheses of heterocycles, drugs, etc. for the future.10agreen chemistry10agreen synthesis10aheterocycles10aheterogeneous catalysis10ahydrotalcite10aMetal Oxide1 aBurange, Anand, S.1 aGopinath, Chinnakonda, S. uhttps://library.ncl.res.in/content/catalytic-applications-hydrotalcite-and-related-materials-multi-component-reactions-concepts01537nas a2200265 4500008004100000022001400041245010300055210006900158260000800227520062000235653002000855653001700875653002800892653001700920653001800937100002300955700002100978700002700999700002201026700002101048700002001069700002301089700003001112856012901142 2021 eng d a1610-365300aGreen synthesis of xanthene and acridine-based heterocycles of pharmaceutical importance: a review0 aGreen synthesis of xanthene and acridinebased heterocycles of ph cMAR3 a

Xanthene and acridine-based heterocyclic compounds find applications in cancer chemotherapy, biological staining and laser dyes and are known for their antibacterial and anti-tumor properties. Here we review green catalytic routes for the synthesis of 1,8-dioxo-octahydroxanthenes, 1,8-dioxo-decahydroacridines and related heterocyclic molecules with catalysts such as metal oxides, mixed metal oxides, resins, supported organocatalysts, heteropolyacids, carbon-based materials, zeolites, sulfides and ionic liquids. We compare protocols for their catalytic activities, and proposed mechanisms are discussed.

10agreen chemistry10aheterocycles10aheterogeneous catalysis10aMetal oxides10ananocatalysis1 aBurange, Anand, S.1 aGadam, Komal, G.1 aTugaonkar, Prajyot, S.1 aThakur, Seema, D.1 aSoni, Ravish, K.1 aKhan, Rubej, R.1 aTai, Mubashira, S.1 aGopinath, Chinnakonda, S. uhttps://library.ncl.res.in/content/green-synthesis-xanthene-and-acridine-based-heterocycles-pharmaceutical-importance-review