文献类型：期刊文献

英文题名：Amphiphilic ionic liquid stabilizing palladium nanoparticles for highly efficient catalytic hydrogenation

作者：Zhu, Wenwen[1];Yang, Hanming[2,3];Yu, Yinyin[1];Hua, Li[1];Li, Huan[1];Feng, Bo[1];Hou, Zhenshan[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[2]S Cent Univ Nationalities, Key Lab Catalysis & Mat Sci, State Ethn Affairs Commiss, Wuhan 430074, Peoples R China;[3]S Cent Univ Nationalities, Minist Educ, Wuhan 430074, Peoples R China

年份：2011

卷号：13

期号：30

起止页码：13492

外文期刊名：PHYSICAL CHEMISTRY CHEMICAL PHYSICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000292978300004)】；

基金：The authors are grateful for support from the National Natural Science Foundation of China (No. 20773037, No. 21073058), the Research Fund for the Doctoral Program of Higher Education of China (20100074110014), China, and the Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and the Ministry of Education, Hubei Province, South-Central University for Nationalities (No. CHCL08001), P.R. China. The authors would also like to express their thanks to Prof Walter Leitner's helpful suggestion and Dr Nils Theyssen's assistance.

语种：英文

摘要：The highly water-soluble palladium nanoparticles (NPs) were synthesized by using the amphiphilic poly(ethylene glycol)-functionalized dicationic imidazolium-based ionic liquid (C(12)Im-PEG IL) as a stabilizing agent. The aqueous dispersed palladium NPs in the range of 1.9 +/- 0.3 nm were observed by transmission electron microscopy (TEM). The physicochemical properties of C(12)Im-PEG IL in aqueous phase have been characterized by electrical conductivity, surface tension and dynamic light scattering (DLS) measurements. It was demonstrated that the amphiphilic ionic liquid can form micelles above its critical micelle concentration (CMC) in aqueous solution and the micelles played a crucial role in stabilizing the palladium NPs and thus promoted catalytic hydrogenation. Furthermore, the dicationic ionic liquid can also act as a gemini surfactant and generated emulsion between hydrophobic substrates and the catalytic aqueous phase during the reaction. The aqueous dispersed palladium NPs showed efficient activity for the catalytic hydrogenation of various substrates under very mild conditions and the stabilizing Pd(0) nanoparticles (NPs) can be reused at least eight times with complete conservation of activity.