title: Highly selective hydrogenation of phenol and derivatives over a Pd@carbon nitride catalyst in aqueous media.
abstract: Cyclohexanone is an important intermediate in the manufacture of polyamides in chemical industry, but direct selective hydrogenation of phenol to cyclohexanone under mild conditions is a challenge. We report here a catalyst made of Pd nanoparticles supported on a mesoporous graphitic carbon nitride, Pd@mpg-C(3)N(4), which was shown to be highly active and promoted the selective formation of cyclohexanone under atmospheric pressure of hydrogen in aqueous media without additives. Conversion of 99% and a selectivity higher than 99% were achieved within 2 h at 65 °C. The reaction can be accelerated at higher temperature, but even at room temperature, 99% conversion and 96% selectivity could still be obtained. The generality of the Pd@mpg-C(3)N(4) catalyst for this reaction was demonstrated by selective hydrogenation of other hydroxylated aromatic compounds with similar performance.
authors.affiliation: Department of Colloid Chemistry, Max-Planck Institute of Colloids and Interfaces, Potsdam, Germany. chemwy@zju.edu.cn
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.forename: Jia
authors.initials: J
authors.lastname: Yao
authors.forename: Haoran
authors.initials: H
authors.lastname: Li
authors.forename: Dangsheng
authors.initials: D
authors.lastname: Su
authors.forename: Markus
authors.initials: M
authors.lastname: Antonietti
mesh_terms: D002384:Catalysis; D003512:Cyclohexanones / Q000138:chemical synthesis* / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry*; D006865:Hydrogenation; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry; D009570:Nitriles / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D010316:Particle Size; D010636:Phenols / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties; D013696:Temperature; D014867:Water / Q000737:chemistry
chemical_list: D003512:Cyclohexanones; D009570:Nitriles; D010636:Phenols; D014867:Water; C011206:cyanogen; C036468:cyclohexanone; D010165:Palladium; D006859:Hydrogen