In situ photoemission observation of catalytic CO oxidation reaction on Pd(110) under near-ambient pressure conditions: Evidence for the Langmuir-Hinshelwood mechanism

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

研究成果: Article査読

24 被引用数 (Scopus)

抄録

CO oxidation reaction on a Pd(110) single crystal surface at various temperatures under near-ambient-pressure conditions has been investigated using in situ X-ray photoemission spectroscopy and mass spectroscopy. At lower temperature conditions, the CO2 formation rate is low, where the surface is covered by CO molecules (i.e., CO poisoning). Above a critical temperature 165 C the Pd(110) surface converts to a catalytically active surface and is dominated by chemisorbed oxygen species. Further at the higher temperatures up to 320 C, the CO2 formation rate is gradually decreased to about 80% of the maximum rate. At this moment, the amount of chemisorbed O was also decreased, which suggests that the CO oxidation reaction proceeds via the conventional Langmuir-Hinshelwood mechanism even under near-ambient pressure conditions.

本文言語English
ページ(範囲)20617-20624
ページ数8
ジャーナルJournal of Physical Chemistry C
117
40
DOI
出版ステータスPublished - 2013 10 10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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