A near-ambient-pressure XPS study on catalytic CO oxidation reaction over a Ru(10 1 ̄ 0) surface

Ryo Toyoshima, Masahiro Shimura, Masaaki Yoshida, Yuji Monya, Kazuma Suzuki, Kenta Amemiya, Kazuhiko Mase, Bongjin Simon Mun, Hiroshi Kondoh

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We investigated the interactions of CO and O2 with Ru(101̄0) 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).

Original languageEnglish
Pages (from-to)128-132
Number of pages5
JournalSurface Science
Volume621
DOIs
Publication statusPublished - 2014 Mar

Fingerprint

Catalytic oxidation
Carbon Monoxide
X ray photoelectron spectroscopy
oxidation
Single crystal surfaces
Photoelectron spectroscopy
crystal surfaces
Oxides
x ray spectroscopy
Reaction rates
pumping
reaction kinetics
mass spectroscopy
photoelectron spectroscopy
Spectroscopy
Oxygen
saturation
X rays
Temperature
oxides

Keywords

  • Catalysis
  • CO oxidation
  • Mass spectroscopy
  • Near-ambient-pressure XPS
  • Ru(10 1 ̄ 0)

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Condensed Matter Physics
  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

A near-ambient-pressure XPS study on catalytic CO oxidation reaction over a Ru(10 1 ̄ 0) surface. / Toyoshima, Ryo; Shimura, Masahiro; Yoshida, Masaaki; Monya, Yuji; Suzuki, Kazuma; Amemiya, Kenta; Mase, Kazuhiko; Mun, Bongjin Simon; Kondoh, Hiroshi.

In: Surface Science, Vol. 621, 03.2014, p. 128-132.

Research output: Contribution to journalArticle

Toyoshima, Ryo ; Shimura, Masahiro ; Yoshida, Masaaki ; Monya, Yuji ; Suzuki, Kazuma ; Amemiya, Kenta ; Mase, Kazuhiko ; Mun, Bongjin Simon ; Kondoh, Hiroshi. / A near-ambient-pressure XPS study on catalytic CO oxidation reaction over a Ru(10 1 ̄ 0) surface. In: Surface Science. 2014 ; Vol. 621. pp. 128-132.
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AU - Suzuki, Kazuma

AU - Amemiya, Kenta

AU - Mase, Kazuhiko

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