title: Active nonmetallic Au and Pt species on ceria-based water-gas shift catalysts.
abstract: Traditional analysis of reactions catalyzed by supported metals involves the structure of the metallic particles. However, we report here that for the class of nanostructured gold- or platinum-cerium oxide catalysts, which are active for the water-gas shift reaction, metal nanoparticles do not participate in the reaction. Nonmetallic gold or platinum species strongly associated with surface cerium-oxygen groups are responsible for the activity.
authors.affiliation: Department of Chemical and Biological Engineering, Tufts University, Medford, MA 02155, USA.
authors.forename: Qi
authors.initials: Q
authors.lastname: Fu
authors.forename: Howard
authors.initials: H
authors.lastname: Saltsburg
authors.forename: Maria
authors.initials: M
authors.lastname: Flytzani-Stephanopoulos