Bidirectional CO2 desorption in steady-state CO oxidation on Rh(110)

Izabela I. Rzeźnicka; Tatsuo Matsushima

doi:10.1021/jp022574r

Bidirectional CO₂ desorption in steady-state CO oxidation on Rh(110)

Izabela I. Rzeźnicka, Tatsuo Matsushima

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The angular and velocity distributions of desorbing product CO₂ were studied in steady-state CO oxidation on Rh(110) by means of cross-correlation time-of-flight techniques and low-energy electron diffraction. In the limited CO pressure range in the active region, where the reaction was fairly order in CO, the angular distribution in the plane including the [001] direction abruptly changed from a normally directed form into bidirectional lobes collimated at ±24° from the surface normal. At the same time, the CO₂ productivity was enhanced, and the (1 × 2) LEED pattern due to the missing-row structure was observed. The translational temperature of desorbing CO₂ was maximized at these collimation angles. The metastable (1 × 2) missing-row structure was proposed to be responsible for this CO₂ formation. However, in the inhibited region, where CO retarded the reaction, desorbing CO₂ was thermalized to the surface temperature.

Original language	English
Pages (from-to)	8479-8483
Number of pages	5
Journal	Journal of Physical Chemistry B
Volume	107
Issue number	33
DOIs	https://doi.org/10.1021/jp022574r
Publication status	Published - 2003 Aug 21
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1021/jp022574r

Cite this

@article{e0f56676b3fb4ba2aac86d394bf430f8,

title = "Bidirectional CO2 desorption in steady-state CO oxidation on Rh(110)",

abstract = "The angular and velocity distributions of desorbing product CO2 were studied in steady-state CO oxidation on Rh(110) by means of cross-correlation time-of-flight techniques and low-energy electron diffraction. In the limited CO pressure range in the active region, where the reaction was fairly order in CO, the angular distribution in the plane including the [001] direction abruptly changed from a normally directed form into bidirectional lobes collimated at ±24° from the surface normal. At the same time, the CO2 productivity was enhanced, and the (1 × 2) LEED pattern due to the missing-row structure was observed. The translational temperature of desorbing CO2 was maximized at these collimation angles. The metastable (1 × 2) missing-row structure was proposed to be responsible for this CO2 formation. However, in the inhibited region, where CO retarded the reaction, desorbing CO2 was thermalized to the surface temperature.",

author = "Rze{\'z}nicka, {Izabela I.} and Tatsuo Matsushima",

year = "2003",

month = aug,

day = "21",

doi = "10.1021/jp022574r",

language = "English",

volume = "107",

pages = "8479--8483",

journal = "Journal of Physical Chemistry B",

issn = "1520-6106",

number = "33",

}

TY - JOUR

T1 - Bidirectional CO2 desorption in steady-state CO oxidation on Rh(110)

AU - Rzeźnicka, Izabela I.

AU - Matsushima, Tatsuo

PY - 2003/8/21

Y1 - 2003/8/21

N2 - The angular and velocity distributions of desorbing product CO2 were studied in steady-state CO oxidation on Rh(110) by means of cross-correlation time-of-flight techniques and low-energy electron diffraction. In the limited CO pressure range in the active region, where the reaction was fairly order in CO, the angular distribution in the plane including the [001] direction abruptly changed from a normally directed form into bidirectional lobes collimated at ±24° from the surface normal. At the same time, the CO2 productivity was enhanced, and the (1 × 2) LEED pattern due to the missing-row structure was observed. The translational temperature of desorbing CO2 was maximized at these collimation angles. The metastable (1 × 2) missing-row structure was proposed to be responsible for this CO2 formation. However, in the inhibited region, where CO retarded the reaction, desorbing CO2 was thermalized to the surface temperature.

AB - The angular and velocity distributions of desorbing product CO2 were studied in steady-state CO oxidation on Rh(110) by means of cross-correlation time-of-flight techniques and low-energy electron diffraction. In the limited CO pressure range in the active region, where the reaction was fairly order in CO, the angular distribution in the plane including the [001] direction abruptly changed from a normally directed form into bidirectional lobes collimated at ±24° from the surface normal. At the same time, the CO2 productivity was enhanced, and the (1 × 2) LEED pattern due to the missing-row structure was observed. The translational temperature of desorbing CO2 was maximized at these collimation angles. The metastable (1 × 2) missing-row structure was proposed to be responsible for this CO2 formation. However, in the inhibited region, where CO retarded the reaction, desorbing CO2 was thermalized to the surface temperature.

UR - http://www.scopus.com/inward/record.url?scp=0042416941&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042416941&partnerID=8YFLogxK

U2 - 10.1021/jp022574r

DO - 10.1021/jp022574r

M3 - Article

AN - SCOPUS:0042416941

SN - 1520-6106

VL - 107

SP - 8479

EP - 8483

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 33

ER -

Bidirectional CO₂ desorption in steady-state CO oxidation on Rh(110)

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this