title: Controlled synthesis of uniform palladium nanoparticles on novel micro-porous carbon as a recyclable heterogeneous catalyst for the Heck reaction.
abstract: Novel dual-porous carbon-supported palladium nanoparticle (Pd NP) catalysts were prepared by sequential carbonization and reduction of microporous organic polymer-encaged PdCl2. The diverse pore structure of microporous organic polymers provides a reservoir for the palladium precursors and prevents Pd NPs from sintering during the carbonization and reaction. The microporous structure has a significant effect on the size and dispersion of palladium NPs. The average size of the Pd NPs (in the range of 4-6 nm) was tuned by changing the pore size distribution and the carbonization temperature. The resulting carbon-supported Pd NPs were characterized by TEM, BET, XRD, and XPS and the Pd loading was calculated by AAS. The encaged Pd NP catalysts prepared by this methodology exhibited outstanding stability and reusability in the Heck reaction and could be reused at least 10 times without appreciable loss of activity.
authors.affiliation: Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Luoyu Road No. 1037, Wuhan, 430074, China. taoli@mail.hust.edu.cn.
authors.forename: Kunpeng
authors.initials: K
authors.lastname: Song
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Jingyu
authors.initials: J
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Pang
authors.forename: Jian
authors.initials: J
authors.lastname: Chen
authors.forename: Irshad
authors.initials: I
authors.lastname: Hussain
authors.forename: Bien
authors.initials: B
authors.lastname: Tan
authors.forename: Tao
authors.initials: T
authors.lastname: Li
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D053768:Metal Nanoparticles / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D010316:Particle Size; D016062:Porosity; D013696:Temperature
chemical_list: D010165:Palladium; D002244:Carbon