title: Fabrication of Co(OH)2 coated Pt nanoparticles as an efficient catalyst for chemoselective hydrogenation of halonitrobenzenes.
abstract: Co(OH)(2) coated platinum nanoparticles Pt/Co(OH)(2) were prepared by microwave assistance and hydrothermal method, and the prepared samples were composed of Pt nanoparticles with an average size of 1.8 nm coated uniformly in the thin Co(OH)(2) leaves based on the results of X-ray diffraction, transmission electron microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. The Pt/Co(OH)(2) presented excellent catalytic performance in the chemoselective hydrogenation of halonitrobenzenes such as chloronitrobenzenes, bromonitrobenzene and iodonitrobenzene, and above 99.6% selectivity to haloanilines was achieved at complete conversion irrespective of the substrates used, even for iodonitrobenzene to which the dehalogenation is more easily to occur. Co(OH)(2) was confirmed to prohibit the dehalogenation effectively, and the Pt/Co(OH)(2) catalyst could be recycled for several times.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China.
authors.forename: Haiyang
authors.initials: H
authors.lastname: Cheng
authors.forename: Xiangchun
authors.initials: X
authors.lastname: Meng
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Ming
authors.forename: Yancun
authors.initials: Y
authors.lastname: Yu
authors.forename: Fengyu
authors.initials: F
authors.lastname: Zhao
mesh_terms: D000814:Aniline Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D006865:Hydrogenation; D006878:Hydroxides / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008872:Microwaves; D009578:Nitrobenzenes / Q000737:chemistry*; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature
chemical_list: D000814:Aniline Compounds; D006878:Hydroxides; D009578:Nitrobenzenes; C518276:cobalt hydroxide; D003035:Cobalt; D010984:Platinum; C023650:aniline