摘要
以聚乙烯吡咯烷酮(PVP)/乙二醇/H2Pt Cl6溶液为反应体系,采用微波辐射法制备PVP稳定的PVP/Pt胶体,对生成的胶体粒子进行TEM表征,利用UV-Vis检测微波反应体系中Pt粒子的形成过程,以间氯硝基苯(m-CNB)选择加氢制间氯苯胺(m-CAN)反应为探针考察微波反应体系构成及微波加热条件对PVP/Pt胶体催化性能的影响。结果表明:该方法制备的PVP/Pt胶体粒子分布均匀,平均粒径1.98 nm。在常压、303 K下m-CNB加氢反应60 min,催化转换频率(TOF)达到0.205 s-1,相应的m-CNB转化率和m-CAN选择性分别为94.4%和92.1%。
Poly（ N-vinyl-2-pyrrolidone）-stabilized platinum（ PVP / Pt） colloids are prepared by microwave radiation using PVP /ethylene glycol/H_2 PtCl_6solution as reaction system,and the prepared colloids particles are characterized by TEM. The formation process of Pt particles in microwave radiation reaction system is monitored by UV-Vis. The effects of the reaction system composition and microwave heating conditions on hydrogenation properties over PVP / Pt colloids are investigated using m-chloronitrobenzene（ mCNB） hydrogenation to m-chloroaniline（ m-CAN） as probe. TEM result shows that Pt particles（ about 1. 98 nm） is uniform with high dispersion in PVP / Pt colloids. After 60 min reaction at normal pressure and 303 K,the catalytic turnover frequency（ TOF） for m-CNB hydrogenation over PVP / Pt colloids is 0. 205 s^（-1）,and the conversion of m-CNB and selectivity to m-CAN is 94. 4% and 92. 1%,respectively.
出处
《能源化工》
2015年第6期60-63,共4页
Energy Chemical Industry
基金
黑龙江省教育厅面上项目(12541060)
国家大学生创新创业训练项目(2012102200009)
东北石油大学青年科学基金(2013NQ112)
关键词
微波加热
均相催化
聚乙烯吡咯烷酮
胶体催化剂
间氯硝基苯
选择加氢
microwave radiation
homogeneous catalysis
poly（N-vinyl-2-pyrrolidone）
colloid catalyst
m-chloronitrobenzene
selective hydrogenation
