title: Kinetics and mechanism of catalytic partial oxidation reactions of alkanes on rhodium surfaces.
abstract: The kinetics of the partial oxidation of isobutane with molecular oxygen on Rh(111) single-crystal surfaces were studied by using a collimated molecular beam under ultrahigh vacuum conditions. Both hydrogen and water were shown to form as primary products, not after secondary reforming or water-gas shift steps as it has been suggested in the past. The production of carbon monoxide (but not of carbon dioxide) was also detected. Water production reaches its steady-state rate in a slower fashion than the rest of the products, presumably because of the kinetics of formation and consumption of the hydroxo surface intermediate involved.
authors.affiliation: Department of Chemistry, University of California, Riverside, California 92521, USA.
authors.forename: Jarod N
authors.initials: JN
authors.lastname: Wilson
authors.forename: Ryan A
authors.initials: RA
authors.lastname: Pedigo
authors.forename: Francisco
authors.initials: F
authors.lastname: Zaera