01879nas a2200217   4500008004100000022001400041245011700055210006900172260007300241300001000314490000800324520104600332653002101378653002801399653001701427653002201444653002301466100002101489700002101510856013001531       2016                        eng d  a0926-860X00aSpectroscopy and catalytic activity study of gold supported on barium titanate nanotubes for styrene epoxidation0 aSpectroscopy and catalytic activity study of gold supported on b  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG  a61-720 v5233 a<p>Gold (0.5-5 wt.%) supported on barium titanate nanotubes (Au/BaTNT) were prepared, characterized and for the first time, investigated as catalysts for selective oxidation of styrene with oxygen (O-2 or H-2 + O-2) and peroxides (H2O2 or TBHP). Conversion of styrene enhanced when H-2 was co-added to O-2 in the reactions. Au/BaTNT activated O-2 and H-2 and produced H2O2 in situ for use in oxidations. Peroxides were found better oxidants than O-2. At optimized conditions, styrene oxide selectivity of 80.1 wt.% at styrene conversion of 60.5 wt.% was achieved over Au(1 wt.%)/BaTNT using TBHP. Au particles (5.0-7.4 nm) were dispersed and decorated on the walls of BaTNT. They exhibited superior performance to the known Au catalysts in styrene oxidation. Reactive oxygen species formed during oxidation reactions were followed with in situ spectral characterizations (diffuse reflectance UV-vis and FT -Raman). Au/BaTNT was reusable in four recycles with little loss in catalytic activity. (C) 2016 Elsevier B.V. All rights reserved.</p>10aAu Nanoparticles10areactive oxygen species10aspectroscopy10aStyrene Oxidation10aTitanate nanotubes1 aNepak, Devadutta1 aSrinivas, Darbha  uhttps://library.ncl.res.in/content/spectroscopy-and-catalytic-activity-study-gold-supported-barium-titanate-nanotubes-styrene