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《au催化劑論文：負(fù)載型au催化劑的制備及其在肉桂醛選擇性加氫反應(yīng)中的應(yīng)用研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、Au催化劑論文：負(fù)載型Au催化劑的制備及其在肉桂醛選擇性加氫反應(yīng)中的應(yīng)用研究【中文摘要】負(fù)載型納米Au催化劑在許多化合物的【英文摘要】Supportedgoldcatalystsareakindofpromisingcatalystsforselectivehydrogenationbasedontheirgoodactivityandselectivityforthereductionofmanycompounds.Inthispaper,usingseveralmetaloxidesdopedTiO
2、2assupports,whichwerepreparedbythesol-gelmethod,aseriesofgoldcatalystswerepreparedbythedeposition-precipitation（DP）method.Additionally,aseriesofAu/La（OH）3catalystswerepreparedbycocipitation（CP）method.Allthecatalystweretestedincinnamaldehydehydrogenation.
3、Theirphisico-chemicalpropertieswereinvestigatedbyXRD,TEM,XPS,BETandTPRtechniques.Thereactionconditionsofcinnamaldehydeselectivehydrogenationwereoptimized.TheresultsshowthattheperformanceofAu/TiO2catalystisinfluencedbythetypeandthecontentofadditives.Among
4、themetaloxidepromoterstested,La2O3modifiedAu/TiO2showsthebestselectivityforthereductionofcarbon-carbondoublebondincinnamaldehyde.ThemoderateamountofLa2O3（10wt%）canobviouslyimprovethecatalyticactivityandselectivityofAu/TiO2forcinnamaldehydehydrogenation.T
5、hepresenceofLa2O3inTiO2restrainsthegrowthofTiO2crystallites,increasesthesurfaceareaofcatalystsandmakestheparticlesizedistributionofAucrystallitesmoreevenly.ThegoldonthesurfaceofAu/TiO2existsmainlyasAu0,butontheLa2O3dopedcatalystthereisasmallportionofAu3+
6、speciesbesidesAu0,whichmaybenefittheactivationoftheC=Obondofcinnamaldehyde.TheresultsshowthatLa（OH）3supportedgoldcatalystshowshighselectivityforthereductionofcarbon-carbondoublebond.Withthecharacterizationresults,thereasonofthehighselectivityisthatthesup
7、porterLa（OH）3andAuinteracttoformauniquestructure.ThepreparationconditionsofAu/La（OH）3catalystareoptimizedasfollows:2wt%ofgoldcontent,calcinationtemperature100°Candreductiontemperature150°C.ThereactionconditionsofcinnamaldehydeselectivehydrogenationoverAu
8、/La（OH）3catalystareoptimizedasfollows:reactiontemperature180°C,reactionpressure2.0MPa,catalystdosage0.25g,solventisopropanol.Undertheoptimalconditions,theconversionofcinnamaldehydeandtheselectivitytocinnamylalcoholcanreach
