Adsorption and Reaction of CO and NO on Ir(111) under Near Ambient Pressure Conditions

K. Ueda, K. Suzuki, Ryo Toyoshima, Y. Monya, M. Yoshida, Kazuhisa Isegawa, K. Amemiya, K. Mase, B. S. Mun, M. A. Arman, E. Grånäs, J. Knudsen, J. Schnadt, Hiroshi Kondoh

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The adsorption and reaction of CO and NO on Ir(111) have been studied by near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) together with low-energy electron diffraction, scanning tunneling microscopy, and mass spectroscopy (MS). Under both ultrahigh vacuum (UHV) and NAP conditions CO molecules occupy on-top sites of the Ir(111) surface at room temperature (RT) by forming two-dimensional clusters. Exposure to NO under UHV conditions at RT induces partially dissociative adsorption, while NAP NO exposure leads to a Ir(111) surface that is covered by molecular NO. We conducted in-operando NAP-XPS/MS observation of the NO + 13CO reaction under a NAP condition as a function of temperature. Below 210 °C adsorption of NO is inhibited by CO, while above 210 °C the CO inhibition is released due to partial desorption of CO and dissociative adsorption of NO starts to occur leading to associative formation of N2. Under the most active condition studied here the Ir surface is covered by a dense co-adsorption layer consisting of on-top CO, atomic N and O, which suggests that this reaction is not a NO-dissociation-limited process but a N2/CO2 formation-limited process.

Original languageEnglish
Pages (from-to)487-496
Number of pages10
JournalTopics in Catalysis
Volume59
Issue number5-7
DOIs
Publication statusPublished - 2016 Mar 1

Fingerprint

Carbon Monoxide
Adsorption
Ultrahigh vacuum
X ray photoelectron spectroscopy
Spectroscopy
Low energy electron diffraction
Scanning tunneling microscopy
Temperature
Desorption
Molecules

Keywords

  • CO adsorption
  • In-situ observation
  • Ir(111)
  • NAP-XPS
  • NO + CO reaction
  • NO adsorption

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Adsorption and Reaction of CO and NO on Ir(111) under Near Ambient Pressure Conditions. / Ueda, K.; Suzuki, K.; Toyoshima, Ryo; Monya, Y.; Yoshida, M.; Isegawa, Kazuhisa; Amemiya, K.; Mase, K.; Mun, B. S.; Arman, M. A.; Grånäs, E.; Knudsen, J.; Schnadt, J.; Kondoh, Hiroshi.

In: Topics in Catalysis, Vol. 59, No. 5-7, 01.03.2016, p. 487-496.

Research output: Contribution to journalArticle

Ueda, K, Suzuki, K, Toyoshima, R, Monya, Y, Yoshida, M, Isegawa, K, Amemiya, K, Mase, K, Mun, BS, Arman, MA, Grånäs, E, Knudsen, J, Schnadt, J & Kondoh, H 2016, 'Adsorption and Reaction of CO and NO on Ir(111) under Near Ambient Pressure Conditions', Topics in Catalysis, vol. 59, no. 5-7, pp. 487-496. https://doi.org/10.1007/s11244-015-0523-5
Ueda, K. ; Suzuki, K. ; Toyoshima, Ryo ; Monya, Y. ; Yoshida, M. ; Isegawa, Kazuhisa ; Amemiya, K. ; Mase, K. ; Mun, B. S. ; Arman, M. A. ; Grånäs, E. ; Knudsen, J. ; Schnadt, J. ; Kondoh, Hiroshi. / Adsorption and Reaction of CO and NO on Ir(111) under Near Ambient Pressure Conditions. In: Topics in Catalysis. 2016 ; Vol. 59, No. 5-7. pp. 487-496.
@article{129109af598b452ea315ab78a01fed5b,
title = "Adsorption and Reaction of CO and NO on Ir(111) under Near Ambient Pressure Conditions",
abstract = "The adsorption and reaction of CO and NO on Ir(111) have been studied by near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) together with low-energy electron diffraction, scanning tunneling microscopy, and mass spectroscopy (MS). Under both ultrahigh vacuum (UHV) and NAP conditions CO molecules occupy on-top sites of the Ir(111) surface at room temperature (RT) by forming two-dimensional clusters. Exposure to NO under UHV conditions at RT induces partially dissociative adsorption, while NAP NO exposure leads to a Ir(111) surface that is covered by molecular NO. We conducted in-operando NAP-XPS/MS observation of the NO + 13CO reaction under a NAP condition as a function of temperature. Below 210 °C adsorption of NO is inhibited by CO, while above 210 °C the CO inhibition is released due to partial desorption of CO and dissociative adsorption of NO starts to occur leading to associative formation of N2. Under the most active condition studied here the Ir surface is covered by a dense co-adsorption layer consisting of on-top CO, atomic N and O, which suggests that this reaction is not a NO-dissociation-limited process but a N2/CO2 formation-limited process.",
keywords = "CO adsorption, In-situ observation, Ir(111), NAP-XPS, NO + CO reaction, NO adsorption",
author = "K. Ueda and K. Suzuki and Ryo Toyoshima and Y. Monya and M. Yoshida and Kazuhisa Isegawa and K. Amemiya and K. Mase and Mun, {B. S.} and Arman, {M. A.} and E. Gr{\aa}n{\"a}s and J. Knudsen and J. Schnadt and Hiroshi Kondoh",
year = "2016",
month = "3",
day = "1",
doi = "10.1007/s11244-015-0523-5",
language = "English",
volume = "59",
pages = "487--496",
journal = "Topics in Catalysis",
issn = "1022-5528",
publisher = "Springer Netherlands",
number = "5-7",

}

TY - JOUR

T1 - Adsorption and Reaction of CO and NO on Ir(111) under Near Ambient Pressure Conditions

AU - Ueda, K.

AU - Suzuki, K.

AU - Toyoshima, Ryo

AU - Monya, Y.

AU - Yoshida, M.

AU - Isegawa, Kazuhisa

AU - Amemiya, K.

AU - Mase, K.

AU - Mun, B. S.

AU - Arman, M. A.

AU - Grånäs, E.

AU - Knudsen, J.

AU - Schnadt, J.

AU - Kondoh, Hiroshi

PY - 2016/3/1

Y1 - 2016/3/1

N2 - The adsorption and reaction of CO and NO on Ir(111) have been studied by near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) together with low-energy electron diffraction, scanning tunneling microscopy, and mass spectroscopy (MS). Under both ultrahigh vacuum (UHV) and NAP conditions CO molecules occupy on-top sites of the Ir(111) surface at room temperature (RT) by forming two-dimensional clusters. Exposure to NO under UHV conditions at RT induces partially dissociative adsorption, while NAP NO exposure leads to a Ir(111) surface that is covered by molecular NO. We conducted in-operando NAP-XPS/MS observation of the NO + 13CO reaction under a NAP condition as a function of temperature. Below 210 °C adsorption of NO is inhibited by CO, while above 210 °C the CO inhibition is released due to partial desorption of CO and dissociative adsorption of NO starts to occur leading to associative formation of N2. Under the most active condition studied here the Ir surface is covered by a dense co-adsorption layer consisting of on-top CO, atomic N and O, which suggests that this reaction is not a NO-dissociation-limited process but a N2/CO2 formation-limited process.

AB - The adsorption and reaction of CO and NO on Ir(111) have been studied by near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) together with low-energy electron diffraction, scanning tunneling microscopy, and mass spectroscopy (MS). Under both ultrahigh vacuum (UHV) and NAP conditions CO molecules occupy on-top sites of the Ir(111) surface at room temperature (RT) by forming two-dimensional clusters. Exposure to NO under UHV conditions at RT induces partially dissociative adsorption, while NAP NO exposure leads to a Ir(111) surface that is covered by molecular NO. We conducted in-operando NAP-XPS/MS observation of the NO + 13CO reaction under a NAP condition as a function of temperature. Below 210 °C adsorption of NO is inhibited by CO, while above 210 °C the CO inhibition is released due to partial desorption of CO and dissociative adsorption of NO starts to occur leading to associative formation of N2. Under the most active condition studied here the Ir surface is covered by a dense co-adsorption layer consisting of on-top CO, atomic N and O, which suggests that this reaction is not a NO-dissociation-limited process but a N2/CO2 formation-limited process.

KW - CO adsorption

KW - In-situ observation

KW - Ir(111)

KW - NAP-XPS

KW - NO + CO reaction

KW - NO adsorption

UR - http://www.scopus.com/inward/record.url?scp=84959479595&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84959479595&partnerID=8YFLogxK

U2 - 10.1007/s11244-015-0523-5

DO - 10.1007/s11244-015-0523-5

M3 - Article

AN - SCOPUS:84959479595

VL - 59

SP - 487

EP - 496

JO - Topics in Catalysis

JF - Topics in Catalysis

SN - 1022-5528

IS - 5-7

ER -