Adsorption of oxygen on (100), (110) and (111) surfaces of Ag, Cu and Ni: An electron spectroscopic study

Rajumon, M.K.; Prabhakaran, K.; Rao, C. N. R.

doi:10.1016/0039-6028(90)90169-9

Cited by 92 publications

(55 citation statements)

References 18 publications

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“…In the present work, we focus on the (1 1 1) surface of Cu and report results of first-principles calculations for the relative stability of surface oxides, and oxide surfaces, with the former being thin oxidic structures formed on the copper metal surface and the latter cleaved crystallographic surfaces of the bulk oxide material. The O/Cu(1 1 1) system has been investigated both theoretically [3,18] and experimentally [19][20][21][22][23][24][25][26][27][28][29]. Recent ultra-high vacuum scanning tunneling microscopy experiments [19] have shown that oxidation of the Cu(1 1 1) surface is extremely complex.…”

Section: Introductionmentioning

confidence: 98%

Surface oxides of the oxygen–copper system: Precursors to the bulk oxide phase?

et al. 2007

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Section: Introductionmentioning

confidence: 98%

Surface oxides of the oxygen–copper system: Precursors to the bulk oxide phase?

et al. 2007

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“…23,24 Most of studies concentrated on adsorption above room temperature and revealed that the only structure with long-range order is the reconstructed ( 2×2 2)-R45°-O structure with a saturation coverage of 0.5 ML. In the ( 2×2 2)R45°-O phase, paired -Cu-O-chains grow along the [001] direction and every fourth row of Cu atoms along the [001] direction is removed.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Atoms on Cu(100) Formed at 100 K, Active for CO Oxidation and Water−Hydrogen Abstraction, Characterized by HREELS and TPD

1997

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The reactivity of oxygen adatoms formed by dissociative adsorption of O 2 on Cu(100) at 100 K for CO oxidation and hydrogen abstraction from water was investigated by means of HREELS and TPD in comparison with the reactivity of adsorbed oxygen in thermally stable phases. The oxygen adatoms formed on the Cu(100) surface by exposure to O 2 at 100 K, designated as as-exposed oxygen, were found to be reactive with coadsorbed CO to yield a CO 2 desorption peak at 125 K in TPD. The as-exposed oxygen atoms are suggested to be more active for CO oxidation than the oxygen atoms prepared above room temperature on Pt and Pd, which are the most active metals for CO oxidation. On annealing the oxygen-as-exposed surfaces to 300 K, a change in the loss feature of ν(Cu-O) was observed, which was indicative of formations of a pseudo c(2×2)-O phase with O(a) in 4-fold hollow sites and a ( 2×2 2)R45°-O phase comprised of -Cu-O-chains grown along the [001] direction. On these two phases, CO 2 formation in TPD was suppressed by 1 order of magnitude. Isolated oxygen atoms in the as-exposed surface are responsible for the high reactivity for CO oxidation. Hydrogen abstraction from water was also examined as a probe reaction for oxygen adatoms on different phases. The as-exposed surface and the pseudo c(2×2)-O phase were found to be reactive and OH(a) was detected by means of HREELS after subsequent exposure to water at 100 K. In contrast, the ( 2×2 2)-R45°-O phase in which oxygen atoms were incorporated into -Cu-O-chains was inert.

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“…[3][4][5] Oxygen adsorption on a close-packed Cu͑111͒ surface has been experimentally [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] and theoretically 22 investigated. Among the transition metals, Cu plays an important role in materials science.…”

Section: Introductionmentioning

confidence: 99%

Photoemission study of the translational energy induced oxidation processes on Cu(111)

Moritani

Okada

Sato

et al. 2004

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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Articles you may be interested in 1,2-Dibromoethane on Cu(100): Bonding structure and transformation to C2H4Kinetics of the CO oxidation reaction on Pt(111) studied by in situ high-resolution x-ray photoelectron spectroscopyThe oxidation processes of Cu͑111͒ with a hyperthermal O 2 molecular beam ͑HOMB͒ were studied using high-resolution x-ray photoemission spectroscopy in conjunction with a synchrotron radiation source. The O-uptake curves were precisely measured at ϳ300 K when irradiating with 2.3 and 0.6 eV HOMB on a Cu͑111͒ surface. A Langmuir-type adsorption model at an oxygen coverage ͑⌰͒р0.4 ML describes the kinetics of dissociative adsorption in the HOMB incidence. On the other hand, further inefficient oxidation occurs even for the 2.3 eV HOMB irradiation at ⌰у0.4 ML. A collision-induced absorption mechanism can interpret the slow oxidation process of Cu͑111͒.

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Adsorption of oxygen on (100), (110) and (111) surfaces of Ag, Cu and Ni: An electron spectroscopic study

Cited by 92 publications

References 18 publications

Surface oxides of the oxygen–copper system: Precursors to the bulk oxide phase?

Surface oxides of the oxygen–copper system: Precursors to the bulk oxide phase?

Oxygen Atoms on Cu(100) Formed at 100 K, Active for CO Oxidation and Water−Hydrogen Abstraction, Characterized by HREELS and TPD

Photoemission study of the translational energy induced oxidation processes on Cu(111)

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