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PVP-Pt/Ru胶体催化氢化邻氯硝基苯和间氯硝基苯
引用本文:莫欣欣,肖海连,刘漫红. PVP-Pt/Ru胶体催化氢化邻氯硝基苯和间氯硝基苯[J]. 青岛科技大学学报(自然科学版), 2013, 0(1): 17-21
作者姓名:莫欣欣  肖海连  刘漫红
作者单位:青岛科技大学材料科学与工程学院
基金项目:国家自然科学基金面上项目(21077062)
摘    要:以聚乙烯吡咯烷酮(PVP)为保护剂,乙醇为还原剂(醇/水体积比为9∶1)制备了PVP-Pt/Ru双金属胶体,并用透射电镜进行了表征。以PVP-Pt/Ru双金属胶体为催化剂进行了邻氯硝基苯(o-CNB)和间氯硝基苯(m-CNB)的催化氢化反应。探讨铂钌物质的量比以及加入不同金属离子后对其催化效果的影响。结果表明,PVP-Pt/Ru催化剂的活性随着胶体中铂含量的降低而降低,而选择性增加;以m-CNB为底物时,Co2+离子对PVP-4Pt/1Ru的修饰作用较好,催化剂的活性由0.098mol.s-1提高到0.123mol.s-1,对间氯苯胺的选择性由84.0%提高到92.4%;以o-CNB为底物时,Sn2+离子对PVP-4Pt/1Ru的修饰效果较好,催化剂的活性由0.059mol.s-1提高到0.112mol.s-1,对邻氯苯胺的选择性由93.1%提高到100.0%。

关 键 词:Pt/Ru双金属胶体  催化氢化  金属离子  邻氯硝基苯  间氯硝基苯

Catalytic Hydrogenation of o-and m-Chloronitrobenzene over PVP-Pt/Ru Bimetallic Colloids
MO Xin-xin,XIAO Hai-lian,LIU Man-hong. Catalytic Hydrogenation of o-and m-Chloronitrobenzene over PVP-Pt/Ru Bimetallic Colloids[J]. Journal of Qingdao University of Science and Technology:Natutral Science Edition, 2013, 0(1): 17-21
Authors:MO Xin-xin  XIAO Hai-lian  LIU Man-hong
Affiliation:(College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)
Abstract:PVP-Pt/Ru bimetallic colloids were prepared using poly(N-vinyl-2-pyrrolidone)(PVP) as preserver and ethanol as reductant,and characterized by transmission electron microscopy(TEM).The bimetallic colloids were used in hydrogenation of o-chloronitrobenzene(o-CNB) and m-chloronitrobenzene(m-CNB) as catalyst.The effects of n(Pt)∶n(Ru) and various metal cations on hydrogenation results were investigated.The results showed that the selectivity to chloroaniline(CAN) increased while the activity decreased with the increasing of Ru proportion in Pt/Ru colloids.For the hydrogenation of m-CNB,the catalytic activity of PVP-Pt/Ru increased from 0.059 mol·s-1 to 0.123 mol·s-1,and selectivity to m-CAN increased from 84.0% to 92.4% by adding Co2+ ion as a modifier.For the hydrogenation of o-CNB,the catalytic activity of PVP-Pt/Ru increased from 0.098 mol·s-1 to 0.112 mol·s-1,and selectivity to o-CAN increased from 93.0% to 100% by adding Sn2+ ion.
Keywords:PVP-Pt/Ru bimetallic colloids  catalytic hydrogenation  metal ion  o-chloronitrobenzene  m-chloronitrobenzene
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