title: N-doped mesoporous carbons supported palladium catalysts prepared from chitosan/silica/palladium gel beads.
abstract: In this study, a heterogeneous catalyst including palladium nanoparticles supported on nitrogen-doped mesoporous carbon (Pd@N-C) is synthesized from palladium salts as palladium precursor, colloidal silica as template, and chitosan as carbon source. N2 sorption isotherm results show that the prepared Pd@N-C had a high BET surface area (640m(2)g(-1)) with large porosity. The prepared Pd@N-C is high nitrogen-rich as characterized with element analysis. X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HR-TEM), and Raman spectroscopy characterization of the catalyst shows that the palladium species with different chemical states are well dispersed on the nitrogen-containing mesoporous carbon. The Pd@N-C is high active and shows excellent stability as applied in Heck coupling reactions. This work supplies a successful method to prepare Pd heterogeneous catalysts with high performance from bulk biopolymer/Pd to high porous nitrogen-doped carbon supported palladium catalytic materials.
authors.affiliation: Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China. Electronic address: zengmf@usx.edu.cn.
authors.forename: Minfeng
authors.initials: M
authors.lastname: Zeng
authors.affiliation: Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China.
authors.forename: Yudong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China.
authors.forename: Xia
authors.initials: X
authors.lastname: Yuan
authors.affiliation: Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China.
authors.forename: Ruokun
authors.initials: R
authors.lastname: Feng
authors.affiliation: Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yang
authors.affiliation: Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China.
authors.forename: Chenze
authors.initials: C
authors.lastname: Qi
mesh_terms: D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D048271:Chitosan / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D009584:Nitrogen / Q000737:chemistry; D010165:Palladium / Q000737:chemistry*; D016062:Porosity; D058428:Silica Gel / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry
chemical_list: D010165:Palladium; D058428:Silica Gel; D002244:Carbon; D012822:Silicon Dioxide; D048271:Chitosan; D009584:Nitrogen
keywords: Chitosan; N doped carbon materials; Palladium