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《具有特殊結(jié)構(gòu)和電子性質(zhì)的PdAuAI2O3催化劑上蒽醌加氫反應(yīng)性能.pdf》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、物理化學學~(WuliHuaxueXuebao)AprilActaPhys．一Chim．Sin．2015，31(4)，729-737729[Article]doi：10-3866／PKU．WHXB201501292WWW．whxb．pku．edu．ca具有特殊結(jié)構(gòu)和電子性質(zhì)的PdAu／AI2O3催化劑上蒽醌加氫反應(yīng)性能韓優(yōu)何志遠管永川李韉張金利(天津大學化工學院，天津300072)摘要：通過改變Pd和Au的負載順序合成了一系列具有不同結(jié)構(gòu)和電子性質(zhì)的PdAu雙金屬催化劑，并用于蒽醌加氫反應(yīng)．其中通過先負載Au后負載Pd的順序制得的Pd／Au／AIOs催化劑
2、，其加氫效率可高達14．27g‘．X射線衍射、透射電子顯微鏡、H程序升溫還原和X射線光電子能譜等分析表征結(jié)果顯示，Pd／Au／AIzOa催化劑中分散在Au顆粒表面的Pd納米顆粒具有獨特的爆米花結(jié)構(gòu)，其表面零價態(tài)的單質(zhì)Pd含量最多，而這種表面零價態(tài)的單質(zhì)Pd是蒽醌加氫反應(yīng)中的關(guān)鍵活性組分．此外，Au的加入可有效抑制副反應(yīng)的發(fā)生，減少降解產(chǎn)物的生成，從而大大提高了催化選擇性．關(guān)鍵詞：負載順序：PdAu雙金屬：蒽醌加氫：降解產(chǎn)物中圖分類號：0643CatalyticPerformanceofPdAulAI2O3CatalystwithSpecialStructu
3、ralandElectronicPropertiesinthe2一EthylanthraquinoneHydrogenationReactionHANYouHEZhi-YuanGUANYong-ChuanLIWeiZHANGJin—Li(SchoolofChemicalEngineeringandTechnology,inUniversity,Tianjin300072,PR．China)Abstract：AseriesofbimetaIlicPdAucatalystswithdiferentstructUreSwereprepamdbychangingt
4、heloadingsequenceofPdandAuforthehydrogenationof2-ethyIanthraquinOne．Pd／Au／AI203wasobtainedbyloadingPdontoAuparticlesdepositedontoanAI2O3supportwithahydrogenationefficiencyupl014．27g。L-’．AccordingtoX-raydifraction。transmissionelectronmicroscopy,hydrogentemperatureprogramreduction，a
5、ndX-rayphotoelectronspectroscopymeasurements，thepopcornstructureanduniqueelectronicpropertiesofthePdspeciesinthePd／Au，Al2O3catalystresultedinthehighestcontentofSUrfacemetallicPd。whichwasthemostactivecomponentforthereaction．WhatiSmore．theadditionofAucanefectivelyreducetheamountofde
6、gradationproductsbysuppressingsidereactions．KeyWords：Loadingsequence；BimetallicPdAu；AnthraquinonehydrogenationDegradationproduct1IntroductionnatedtoEAQH2inthepresenceofmetalcatalyst，andthenCatalytichydrogenationof2一ethylanthraquinone(EAQ)into2一EAQH2isoxidizedbyO2toyieldH202withreg
7、enerationoftheethylanthrahydroquinone(EAQH2)isthekeyreactioninthestartingEAQ．ThetargetproductEAQH2formedinthequinone-industrialsynthesisofH2O2．Inthismethod，EAQishydroge—hydroquinonestageundergoesfurtherhydrogenationtogiveReceived：November26，2014；Revised：January28，20l5：PublishedonW
8、eb：January29，2015．’Correspondinga
