Chemical states of surface oxygen during CO oxidation on Pt(1 1 0) surface revealed by ambient pressure XPS

Youngseok Yu, Yoobin Esther Koh, Hojoon Lim, Beomgyun Jeong, Kazuhisa Isegawa, Daehyun Kim, Kohei Ueda, Hiroshi Kondoh, Kazuhiko Mase, Ethan J. Crumlin, Philip N. Ross, Jean Jacques Gallet, Fabrice Bournel, Bongjin Simon Mun

研究成果: Article査読

11 被引用数 (Scopus)

抄録

The study of CO oxidation on Pt(1 1 0) surface is revisited using ambient pressure x-ray photoemission spectroscopy. When the surface temperature reaches the activation temperature for CO oxidation under elevated pressure conditions, both the α-phase of PtO2 oxide and chemisorbed oxygen are formed simultaneously on the surface. Due to the exothermic nature of CO oxidation, the temperature of the Pt surface increases as CO oxidation takes place. As the CO/O2 ratio increases, the production of CO2 increases continuously and the surface temperature also increases. Interestingly, within the diffusion limited regions, the amount of surface oxide changes little while the chemisorbed oxygen is reduced.

本文言語English
論文番号464001
ジャーナルJournal of Physics Condensed Matter
29
46
DOI
出版ステータスPublished - 2017 10 20

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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