01848nas a2200253   4500008004100000022001400041245009400055210006900149260006900218300001200287490000700299520095400306653002301260653002501283653001901308653001201327100001901339700001601358700002701374700002301401700001601424700002901440856012501469       2005                        eng d  a0254-058400aPVA stabilized gold nanoparticles by use of unexplored albeit conventional reducing agent0 aPVA stabilized gold nanoparticles by use of unexplored albeit co  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcJUL  a229-2330 v923 a<p>Poly(vinyl alcohol) (PVA) stabilized gold nanoparticles have been prepared in aqueous medium using two different reducing viz.; hydrazine hydrate, a stronger reducing agent and sodium formaldehydesulfoxylate (SFS), a slightly weaker reducing agent. SFS is used for first ever time for reduction of gold metal salt. The PVA stabilized gold nanoparticles solutions are wine red to blood red coloured and are stable over a long period of time with no indication of aggregation. The solution shows strong visible light absorptions in the range of 520-540 nm, characteristics of gold nanoparticles. Powder X-ray diffraction patterns of freshly prepared films containing gold nanoparticles indicated particles size to be about 15 nm. Transmission electron microscopy (TEM) of a more than two-week-old sample revealed well-defined non-agglomerated spherical particles of about 50 nm diameter in solutions. (c) 2005 Elsevier B.V. All rights reserved.</p>10aChemical synthesis10aelectronic materials10aNanostructures10aPolymer1 aKhanna, P., K.1 aGokhale, R.1 aSubbarao, V., V. V. S.1 aVishwanath, A., K.1 aDas, B., K.1 aSatyanarayana, C., V. V.  uhttps://library.ncl.res.in/content/pva-stabilized-gold-nanoparticles-use-unexplored-albeit-conventional-reducing-agent-001721nas a2200241   4500008004100000022001400041245009200055210006900147260007400216300001200290490000800302520090100310653000901211653001201220653001501232653001601247653000701263100002601270700002401296700001801320700002901338856011201367       2012                        eng d  a1878-519000aPreferential oxidation of CO on Ni/CeO2 catalysts in the presence of excess H-2 and CO20 aPreferential oxidation of CO on NiCeO2 catalysts in the presence  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcDEC  a405-4190 v1073 a<p>Preferential oxidation of CO (CO-PROX) was carried out over Ni supported on CeO2 prepared by the co-precipitation method. The influence of metal loadings (2.5, 5 and 10 wt.% Ni) and the reaction conditions such as reaction temperature and feed composition on CO oxidation and oxidation selectivity were evaluated by using dry reformate gas. No other reactions like CO or CO2 methanation, coking, reverse water gas shift (RWGS) reaction is observed in the temperature range of 100-200 A degrees C on these catalysts. Hydrogen oxidation dominates over CO oxidation above the temperature of 200 A degrees C. An increase in oxygen leads to an increase in CO conversion but a simultaneous decrease in the O-2 selectivity. It has been noticed that 5 and 10 % Ni/CeO2 show better catalytic activity towards CO-PROX reaction. These catalysts were characterized by S-BET, XRD, TEM, XPS and H-2-TPR.</p>10aCeO210aCO-PROX10afuel cells10aMethanation10aNi1 aMalwadkar, Sachin, S.1 aBera, Parthasarathi1 aHegde, M., S.1 aSatyanarayana, C., V. V.  uhttps://library.ncl.res.in/content/preferential-oxidation-co-niceo2-catalysts-presence-excess-h-2-and-co2-0