巯基功能化介孔材料高效锚定钯负载型催化剂的制备及其苯酚加氢催化性能
구기공능화개공재료고효묘정파부재형최화제적제비급기분분가경최화성능
Immobilization of highly active Pd nano-catalysts on functionalized mesoporous silica supports using mercapto groups as anchoring sites and their catalytic performance for phenol hydrogenation
  • 万方数据
    催化学报 최화학보
    CHINESE JOURNAL OF CATALYSIS
    2013年 8期 1519-1526 ,共8页

    张嘉熙%黄高伟%张琤%何群华%黄超%杨旭%宋慧宇%梁振兴%杜丽

    장가희%황고위%장쟁%하군화%황초%양욱%송혜우%량진흥%두려

    介孔氧化硅%巯基修饰%钯%锚定%负载型催化剂%苯酚加氢 介孔氧化硅%巰基脩飾%鈀%錨定%負載型催化劑%苯酚加氫
    개공양화규%구기수식%파%묘정%부재형최화제%분분가경
    Mesoporous silica%Mercapto group functionalization%Palladium%Anchoring%Supported catalyst%Phenol hydrogenation
    以含巯基官能团有机硅烷修饰的介孔材料MCM-41和SBA-15为载体,采用浸渍-氢气还原法制备了高分散和高活性的负载型Pd催化剂.X射线衍射、N2吸附-脱附和透射电子显微镜表征结果显示,所制Pd催化剂Pd-SH-MCM-41和Pd-SH-SBA-15具有很好的长程有序结构、分布均匀的孔径、高比表面积及高度分散的Pd颗粒.苯酚加氢反应结果表明,以Pd-SH-MCM-41和Pd-SH-SBA-15为催化剂时,在80℃,1.0 MPa反应1h,苯酚转化率达99％以上,环己酮选择性为98％.它们的催化活性为商业Pd/C催化剂的5倍,Pd/MCM-41和Pd/SBA-15催化剂的3倍.这可归因于介孔材料表面修饰的巯基官能团对Pd的锚定作用,避免了Pd颗粒的团聚,使其高度分散在介孔材料上.
    이함구기관능단유궤규완수식적개공재료MCM-41화SBA-15위재체,채용침지-경기환원법제비료고분산화고활성적부재형Pd최화제.X사선연사、N2흡부-탈부화투사전자현미경표정결과현시,소제Pd최화제Pd-SH-MCM-41화Pd-SH-SBA-15구유흔호적장정유서결구、분포균균적공경、고비표면적급고도분산적Pd과립.분분가경반응결과표명,이Pd-SH-MCM-41화Pd-SH-SBA-15위최화제시,재80℃,1.0 MPa반응1h,분분전화솔체99％이상,배기동선택성위98％.타문적최화활성위상업Pd/C최화제적5배,Pd/MCM-41화Pd/SBA-15최화제적3배.저가귀인우개공재료표면수식적구기관능단대Pd적묘정작용,피면료Pd과립적단취,사기고도분산재개공재료상.
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