title: C3N4-H5PMo10V2O40: a dual-catalysis system for reductant-free aerobic oxidation of benzene to phenol.
abstract: Hydroxylation of benzene is a widely studied atom economical and environmental benign reaction for producing phenol, aiming to replace the existing three-step cumene process. Aerobic oxidation of benzene with O2 is an ideal and dream process, but benzene and O2 are so inert that current systems either require expensive noble metal catalysts or wasteful sacrificial reducing agents; otherwise, phenol yields are extremely low. Here we report a dual-catalysis non-noble metal system by simultaneously using graphitic carbon nitride (C(3)N(4)) and Keggin-type polyoxometalate H(5)PMo(10)V(2)O(40) (PMoV(2)) as catalysts, showing an exceptional activity for reductant-free aerobic oxidation of benzene to phenol. The dual-catalysis mechanism results in an unusual route to create phenol, in which benzene is activated on the melem unit of C(3)N(4) and O2 by the V-O-V structure of PMoV(2). This system is simple, highly efficient and thus may lead the one-step production of phenol from benzene to a more practical pathway.
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, Jiangsu 210009, P. R. China.
authors.forename: Zhouyang
authors.initials: Z
authors.lastname: Long
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, Jiangsu 210009, P. R. China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, Jiangsu 210009, P. R. China.
authors.forename: Guojian
authors.initials: G
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, Jiangsu 210009, P. R. China.
authors.forename: Weilin
authors.initials: W
authors.lastname: Ge
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, Jiangsu 210009, P. R. China.
authors.forename: Jun
authors.initials: J
authors.lastname: Wang