Author/Authors :
Toyoshima، نويسنده , , Ryo and Shimura، نويسنده , , Masahiro and Yoshida، نويسنده , , Masaaki and Monya، نويسنده , , Yuji and Suzuki، نويسنده , , Kazuma and Amemiya، نويسنده , , Kenta and Mase، نويسنده , , Kazuhiko and Mun، نويسنده , , Bongjin Simon and Kondoh، نويسنده , , Hiroshi، نويسنده ,
Abstract :
We investigated the interactions of CO and O2 with Ru( 10 1 ¯ 0 ) single crystal surfaces, and studied the in-situ catalytic oxidation reaction of CO on the surface under near realistic pressure conditions by using a combination of near-ambient-pressure x-ray photoelectron spectroscopy and differential pumping mass spectroscopy. At lower temperatures (T < 190 °C), most of the surface keeps metallic and is covered by both chemisorbed atomic oxygen and CO, and the CO2 formation rate is relatively slow. At higher temperatures, the reaction rate significantly increases and reaches the saturation, where the Ru surface is dominated by a bulk oxide (i.e. RuO2).
Keywords :
Near-ambient-pressure XPS , Ru( 10 1 ¯ 0 ) , Mass Spectroscopy , Catalysis , CO oxidation
