Adsorption and structure dependent desorption of CO on Co(0001)

J. Lahtinen; Jukka Vaari; Kalle Kauraala

doi:10.1016/S0039-6028(98)00711-0

Adsorption and structure dependent desorption of CO on Co(0001)

J. Lahtinen^*, Jukka Vaari, Kalle Kauraala

^*Tämän työn vastaava kirjoittaja

Aalto University

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

130 Sitaatiot (Scopus)

Abstrakti

The adsorption of CO on the Co(0001) surface at room temperature and at 180 K has been studied using work function measurements, X-ray photoelectron spectroscopy, thermal desorption spectroscopy (TDS) and low energy electron diffraction. At low coverages and at room temperature the standard (√3 × √3)R30°-CO structure was observed. By decreasing the temperature and increasing the CO exposure, other stable structures were found on the surface. The (√7/3 × √7/3)R10.9°-CO structure was found in a small coverage range around θ = 0.43 ML and the (√12/7 × √12/7)R10.9° structure with θ = 0.58 at saturation exposures. Each of the structures were attached to a specific desorption regime in the TDS spectrum. The position of the C 1s and O 1s core levels indicate single adsorption site in the two lower coverage structure and two different adsorption sites for the most dense adsorption layer.

Alkuperäiskieli	Englanti
Sivut	502-510
Sivumäärä	9
Julkaisu	Surface Science
Vuosikerta	418
Numero	3
DOI - pysyväislinkit	https://doi.org/10.1016/S0039-6028(98)00711-0
Tila	Julkaistu - 14 jouluk. 1998
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Pääsy asiakirjaan

10.1016/S0039-6028(98)00711-0

Muut tiedostot ja linkit

Link to publication in Scopus

Siteeraa tätä

@article{7f7f93a523884a639fbf13660d1746a8,

title = "Adsorption and structure dependent desorption of CO on Co(0001)",

abstract = "The adsorption of CO on the Co(0001) surface at room temperature and at 180 K has been studied using work function measurements, X-ray photoelectron spectroscopy, thermal desorption spectroscopy (TDS) and low energy electron diffraction. At low coverages and at room temperature the standard (√3 × √3)R30°-CO structure was observed. By decreasing the temperature and increasing the CO exposure, other stable structures were found on the surface. The (√7/3 × √7/3)R10.9°-CO structure was found in a small coverage range around θ = 0.43 ML and the (√12/7 × √12/7)R10.9° structure with θ = 0.58 at saturation exposures. Each of the structures were attached to a specific desorption regime in the TDS spectrum. The position of the C 1s and O 1s core levels indicate single adsorption site in the two lower coverage structure and two different adsorption sites for the most dense adsorption layer.",

keywords = "Carbon monoxide, Cobalt, Low energy electron diffraction (LEED), Low index single crystal surfaces, Surface structure, Thermal desorption spectroscopy, X-ray photoelectron spectroscopy",

author = "J. Lahtinen and Jukka Vaari and Kalle Kauraala",

year = "1998",

month = dec,

day = "14",

doi = "10.1016/S0039-6028(98)00711-0",

language = "English",

volume = "418",

pages = "502--510",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

number = "3",

}

TY - JOUR

T1 - Adsorption and structure dependent desorption of CO on Co(0001)

AU - Lahtinen, J.

AU - Vaari, Jukka

AU - Kauraala, Kalle

PY - 1998/12/14

Y1 - 1998/12/14

N2 - The adsorption of CO on the Co(0001) surface at room temperature and at 180 K has been studied using work function measurements, X-ray photoelectron spectroscopy, thermal desorption spectroscopy (TDS) and low energy electron diffraction. At low coverages and at room temperature the standard (√3 × √3)R30°-CO structure was observed. By decreasing the temperature and increasing the CO exposure, other stable structures were found on the surface. The (√7/3 × √7/3)R10.9°-CO structure was found in a small coverage range around θ = 0.43 ML and the (√12/7 × √12/7)R10.9° structure with θ = 0.58 at saturation exposures. Each of the structures were attached to a specific desorption regime in the TDS spectrum. The position of the C 1s and O 1s core levels indicate single adsorption site in the two lower coverage structure and two different adsorption sites for the most dense adsorption layer.

AB - The adsorption of CO on the Co(0001) surface at room temperature and at 180 K has been studied using work function measurements, X-ray photoelectron spectroscopy, thermal desorption spectroscopy (TDS) and low energy electron diffraction. At low coverages and at room temperature the standard (√3 × √3)R30°-CO structure was observed. By decreasing the temperature and increasing the CO exposure, other stable structures were found on the surface. The (√7/3 × √7/3)R10.9°-CO structure was found in a small coverage range around θ = 0.43 ML and the (√12/7 × √12/7)R10.9° structure with θ = 0.58 at saturation exposures. Each of the structures were attached to a specific desorption regime in the TDS spectrum. The position of the C 1s and O 1s core levels indicate single adsorption site in the two lower coverage structure and two different adsorption sites for the most dense adsorption layer.

KW - Carbon monoxide

KW - Cobalt

KW - Low energy electron diffraction (LEED)

KW - Low index single crystal surfaces

KW - Surface structure

KW - Thermal desorption spectroscopy

KW - X-ray photoelectron spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=0032315271&partnerID=8YFLogxK

U2 - 10.1016/S0039-6028(98)00711-0

DO - 10.1016/S0039-6028(98)00711-0

M3 - Article

AN - SCOPUS:0032315271

SN - 0039-6028

VL - 418

SP - 502

EP - 510

JO - Surface Science

JF - Surface Science

IS - 3

ER -

Adsorption and structure dependent desorption of CO on Co(0001)

Abstrakti

Pääsy asiakirjaan

Muut tiedostot ja linkit

Sormenjälki

Siteeraa tätä