title: Diatomite-supported Pd-M (M=Cu, Co, Ni) bimetal nanocatalysts for selective hydrogenation of long-chain aliphatic esters.
abstract: Diatomite supported Pd-M (M=Cu, Co, Ni) bimetal nanocatalysts with various metal compositions were prepared and characterized by means of X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was demonstrated that the metal nanoparticles were uniformly distributed on the support, and their size was centered around 8 nm with a relatively narrow size distribution. The catalysts were used to catalyze hydrogenation of long-chain aliphatic esters, including methyl palmitate, methyl stearate, and methyl laurate. It was indicated that the all diatomite-supported Pd-based bimetal catalysts were active to the selective hydrogenation of long-chain esters to corresponding alcohols at 270°C, originated from the synergistic effect between the metal particles and the diatomite support. For the selective hydrogenation of methyl palmitate, Pd-Cu/diatomite with metal loading of 1% and Pd/Cu=3 displayed the highest performance, giving a 1-hexadecanol yield of 82.9% at the substrate conversion of 98.8%.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Changliang
authors.initials: C
authors.lastname: Huang
authors.forename: Hongye
authors.initials: H
authors.lastname: Zhang
authors.forename: Yanfei
authors.initials: Y
authors.lastname: Zhao
authors.forename: Sha
authors.initials: S
authors.lastname: Chen
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Liu
mesh_terms: D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D007692:Diatomaceous Earth / Q000737:chemistry*; D004952:Esters / Q000737:chemistry*; D006865:Hydrogenation; D046529:Microscopy, Electron, Transmission; D009532:Nickel / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*
chemical_list: D004952:Esters; D003035:Cobalt; D010165:Palladium; D007692:Diatomaceous Earth; C033787:diatomite; D003300:Copper; D009532:Nickel