Chemical states of surface oxygen during CO oxidation on Pt(110) surface revealed by ambient pressure XPS.
Skip to main content
eScholarship
Open Access Publications from the University of California

Chemical states of surface oxygen during CO oxidation on Pt(110) surface revealed by ambient pressure XPS.

  • Author(s): Yu, Youngseok
  • Koh, Yoobin Esther
  • Lim, Hojoon
  • Jeong, Beomgyun
  • Isegawa, Kazuhisa
  • Kim, Dae Hyun
  • Ueda, Kohei
  • Kondoh, Hiroshi
  • Mase, Kazuhiko
  • Crumlin, Ethan
  • Ross, Philip N
  • Gallet, Jean-Jacques
  • Bournel, Fabrice
  • Mun, Bongjin Simon
  • et al.
Abstract

The study of CO oxidation on Pt(110) surface is revisited using ambient pressure x-ray photoemission spectroscopy. When the surface temperature reaches the activation temperature for CO oxidation under elevated pressure condition, both the -phase of PtO2 oxide and chemisorbed oxygen are formed simultaneously on the surface. Due to exothermic nature of CO oxidation, the temperature of Pt surface increases as CO oxidation takes places. As the CO/O2 ratio increases, the production of CO2 increases continuously and the surface temperature also increases. Interestingly, during the mass transfer limiting regions, the amount of surface oxide changes little while the chemisorbed oxygen is being reduced. .

Main Content
Current View