02367nas a2200229   4500008004100000022001400041245013300055210006900188260011000257300001400367490000600381520144300387100001701830700001701847700002001864700002001884700002601904700002901930700002201959700003101981856012502012       2012                        eng d  a2046-206900aCe-Ni mixed oxide as efficient catalyst for H-2 production and nanofibrous carbon material from ethanol in the presence of water0 aCeNi mixed oxide as efficient catalyst for H2 production and nan  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcAUG  a9626-96340 v23 a<p>Hydrogen production from ethanol steam reforming (H2O/C2H5OH = 3) was studied over Ce-Ni based catalysts issued from different preparation methods (co-precipitation (CP), impregnation (IMP) and incipient wetness impregnation (IWI)). Catalysts prepared by the CP method exhibit higher activity and much better stability compared to the other two types of catalysts. The Ni1CeOY-CP catalyst is able to completely convert ethanol at 450 degrees C to H-2, CO2 and CH4 (almost no CO is observed), with a H-2 yield of 3 moles of hydrogen produced per mole of ethanol converted. A very high H-2 yield of 4.6 mol mol(EtOH)(-1) is achieved over the Ni1CeOY-CP mixed oxide at 650 degrees C. Correlations between the preparation method, catalytic activity and stability, and type of carbon deposition are discussed. The CP method forms very active small sized NiO (15 nm) and CeO2 (4 nm) nanoparticles, leading to the formation of a lower amount of carbon deposition in the form of nanofibrous carbon materials, the size of which depends on the Ni related nanoparticles. For CP catalysts, the graphitic filaments obtained correspond to carbon nanofibers (CNFs) and carbon nanotubes (CNTs) with a much smaller and homogenous size compared to the filamentous carbon formed over the catalysts issued from the other preparation methods, in relation to the active particles size. The catalytic stability is attributed to the type of carbon formed.</p>1 aFang, Wenhao1 aPirez, Cyril1 aCapron, Mickael1 aPaul, Sebastien1 aRaja, Thirumalaiswamy1 aDhepe, Paresh, Laxmikant1 aDumeignil, Franck1 aJalowiecki-Duhamel, Louise  uhttps://library.ncl.res.in/content/ce-ni-mixed-oxide-efficient-catalyst-h-2-production-and-nanofibrous-carbon-material-001686nas a2200325   4500008004100000022001400041245008800055210006900143260007700212300001400289490000600303520057400309653002800883653001600911653001400927653002200941653002400963100002000987700002201007700002401029700002101053700003101074700001501105700002001120700003101140700002801171700002301199700002201222856011601244       2012                        eng d  a1864-563100aTransesterification of diethyl oxalate with phenol over sol-gel MoO3/TiO2 catalysts0 aTransesterification of diethyl oxalate with phenol over solgel M  aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUL  a1467-14730 v53 a<p>The transesterification of diethyl oxalate (DEO) with phenol to form diphenyl oxalate (DPO) has been carried out in the liquid phase over very efficient MoO3/TiO2 solid-acid solgel catalysts. A selectivity of 100?% with a remarkable maximum yield of 88?% were obtained, which opens the route to downstream phosgene-free processes for the synthesis of polycarbonates. Interpretation of the results of various acidity measurements (NH3 and pyridine desorption, methanol oxidation as a probe reaction) allowed us to identify the catalytic sites as Lewis acid sites.</p>10aheterogeneous catalysis10aLewis acids10aOxidation10asol-gel processes10atransesterification1 aKotbagi, Trupti1 aNguyen, Duy, Luan1 aLancelot, Christine1 aLamonier, Carole1 aThavornprasert, Kaew-Arpha1 aWenli, Zhu1 aCapron, Mickael1 aJalowiecki-Duhamel, Louise1 aUmbarkar, Shubhangi, B.1 aDongare, Mohan, K.1 aDumeignil, Franck  uhttps://library.ncl.res.in/content/transesterification-diethyl-oxalate-phenol-over-sol-gel-moo3tio2-catalysts-002771nas a2200289   4500008004100000022001400041245013200055210006900187260007300256300001200329490000800341520173600349653001202085653001302097653002302110653001702133653002002150100001702170700002002187700002002207700002402227700002802251700002302279700002202302700003102324856012602355       2015                        eng d  a0926-337300aHighly loaded well dispersed stable Ni species in NiXMg2AlOY nanocomposites: application to hydrogen production from bioethanol0 aHighly loaded well dispersed stable Ni species in NiXMg2AlOY nan  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a485-4960 v1663 a<p>Inexpensive NiXMg2AlOY nanocomposites with high Ni content (Ni wt% &gt; 40%) are developed as efficient catalysts for the sustainable hydrogen production from a mixture of ethanol and water at low temperature. The NiXMg2AlOY nanocomposites are composed of small and uniform nanoparticles (4-6 nm) of NiO, Ni-Mg-(Al)-O and/or MgO. The strong interactions existing between Ni2+ cations and Mg2+ and/or Al3+ cations either in the Ni-Mg-(Al)-O solid solution and/or at the interface of nanoparticles of NiO and/or Ni-Mg-(Al)-O make the catalyst highly active and stable. The behavior of the solids is analyzed in the presence of low and high concentrations of ethanol while maintaining a H2O/EtOH molar ratio of 3. The NiXMg2AlOY catalysts are shown to be efficient toward H-2 production between 250 and 650 degrees C. In the presence of low concentration of ethanol, on the highly loaded Ni compound (Ni12Mg2AlOY), total conversion of ethanol is obtained at 250 degrees C without formation of CO and carbon, and at 300 degrees C a H-2 yield of 3 mol moletEtOH(-1) is obtained without the formation of CO, exhibiting a remarkable stability with the time on stream even if some carbon is formed. In high concentration of ethanol, total conversion of ethanol is obtained at 450 degrees C on the highly loaded Ni compound (Ni12Mg2AlOY). In such conditions, a stable co-generation of carbon nanofibrous materials which amount increases with Ni content is also obtained. The catalytic stability is related to the type and morphology of the carbon species formed. The correlations among the catalyst properties, the catalytic performances and the characterizations are thoroughly discussed. (C) 2014 Elsevier B.V. All rights reserved.</p>10aEthanol10aHydrogen10aNanofibrous carbon10anickel oxide10aSteam reforming1 aFang, Wenhao1 aPaul, Sebastien1 aCapron, Mickael1 aBiradar, Ankush, V.1 aUmbarkar, Shubhangi, B.1 aDongare, Mohan, K.1 aDumeignil, Franck1 aJalowiecki-Duhamel, Louise  uhttps://library.ncl.res.in/content/highly-loaded-well-dispersed-stable-ni-species-nixmg2aloy-nanocomposites-application-0