title: Direct epoxidation of propylene over stabilized Cu(+) surface sites on titanium-modified Cu2O.
abstract: Direct propylene epoxidation by O2 is a challenging reaction because of the strong tendency for complete combustion. Results from the current study demonstrate that by generating highly dispersed and stabilized Cu(+) active sites in a TiCuOx mixed oxide the epoxidation selectivity can be tuned. The TiCuOx surface anchors the key surface intermediate, an oxametallacycle, leading to higher selectivity for epoxidation of propylene.
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, 2 Center St., Upton, NY 11973 (USA).
authors.forename: Xiaofang
authors.initials: X
authors.lastname: Yang
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, 2 Center St., Upton, NY 11973 (USA).
authors.forename: Shyam
authors.initials: S
authors.lastname: Kattel
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716 (USA).
authors.forename: Ke
authors.initials: K
authors.lastname: Xiong
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, 2 Center St., Upton, NY 11973 (USA).
authors.forename: Kumudu
authors.initials: K
authors.lastname: Mudiyanselage
authors.affiliation: Sergei Rykov, Department of Semiconductors Physics and Nanoelectronics, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg (Russia).
authors.forename: Sergei
authors.initials: S
authors.lastname: Rykov
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, 2 Center St., Upton, NY 11973 (USA).
authors.forename: Sanjaya D
authors.initials: SD
authors.lastname: Senanayake
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, 2 Center St., Upton, NY 11973 (USA).
authors.forename: José A
authors.initials: JA
authors.lastname: Rodriguez
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, 2 Center St., Upton, NY 11973 (USA).
authors.forename: Ping
authors.initials: P
authors.lastname: Liu
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, 2 Center St., Upton, NY 11973 (USA).
authors.forename: Dario J
authors.initials: DJ
authors.lastname: Stacchiola
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, 2 Center St., Upton, NY 11973 (USA). jgchen@columbia.edu.|Department of Chemical Engineering, Columbia University, 500 W. 120th St., New York, NY 10027 (USA). jgchen@columbia.edu.
authors.forename: Jingguang G
authors.initials: JG
authors.lastname: Chen
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D004852:Epoxy Compounds / Q000737:chemistry*; D008958:Models, Molecular; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D000475:Alkenes; D004852:Epoxy Compounds; D003300:Copper; C013658:propylene; D014025:Titanium; C000520:cuprous oxide
keywords: copper; epoxidation; mixed oxides; oxidation; propylene oxide