Structure determination of Rh(100)-c(2 × 2)-S using the surface extended X-ray absorption fine structure technique

Dhanak, Vinod R.; Harte, S.P.; Scarel, Giovanna; Cowie, Bruce C. C.; Santoni, A.

doi:10.1016/0039-6028(96)00939-9

Cited by 11 publications

(13 citation statements)

References 25 publications

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“…This is indicated by the bond lengths of 2.36 Å and 2.37 Å for p(2 · 2)-S and c(2 · 2)-S respectively, as compared to the value of 2.39 Å expected from the covalent radius of S (based on the 2.05 Å bond length of S 2 and the metallic radius of Ir, 1.36 Å [38]). Similar behaviour was observed on Cu [41], Ni [7], Pd [8,9], Mo [42] and Rh [10][11][12] surfaces.…”

Section: The Nature Of the P(2 · 2)-s And C(2 · 2)-s Phases Of Ir{1 0 0}supporting

confidence: 77%

“…Ir{1 0 0}-c(2 · 2)-S: structure determination Atomic adsorbates at low coverages tend to adsorb on well-defined sites. S is generally found to adsorb on fourfold symmetric hollow sites on fcc{1 0 0} surfaces of transition metals such as Ni [7], Pd [8,9], Rh [10][11][12] and Cu [41]. In order to exclude any unlikely geometric configuration, we tested as a first step three types of structures, shown in Fig.…”

Section: Adsorption Of S On the Ir{1 0 0}-(1 · 1) Phasementioning

confidence: 99%

“…On fcc{1 0 0} surfaces of transition metals such as Pt [4][5][6], Ni [7], Pd [8,9] and Rh [10][11][12], adsorption of sulphur normally leads to the formation of a p(2 · 2) overlayer followed by a c(2 · 2) overlayer with increasing coverage. A large number of structural studies on the chemisorption of S on fcc{1 0 0} surfaces using a variety of techniques have been carried out [7][8][9][10][11][12][13]. In all these studies, sulphur has been found to adsorb in the symmetric fourfold hollow site.…”

Section: Introductionmentioning

confidence: 99%

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The adsorption geometry of sulphur on Ir{100}: A quantitative LEED study

Lerotholi¹,

Held²,

King³

2006

Surface Science

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Section: The Nature Of the P(2 · 2)-s And C(2 · 2)-s Phases Of Ir{1 0 0}supporting

confidence: 77%

Section: Adsorption Of S On the Ir{1 0 0}-(1 · 1) Phasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The adsorption geometry of sulphur on Ir{100}: A quantitative LEED study

Lerotholi¹,

Held²,

King³

2006

Surface Science

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“…The surface structure of the S on Rh͑100͒ system has been previously investigated using several techniques 4,8,[18][19][20][21] including LEED, 18,19 high-resolution electron energy-loss spectroscopy, 3 normal incidence standing x-ray wave field adsorption ͑NISXW͒, 4 SEXAFS, 20 and self-consistent scattering theory. 21 Experimentally it has been found that with increasing coverage, p͑2ϫ2͒ and c͑2ϫ2͒ phases are formed.…”

Section: Introductionmentioning

confidence: 99%

Angle-resolved photoemission study of half-monolayer O and S structures on the Rh(100) surface

et al. 1997

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The valence-band photoemission of the Rh(100)-c(2ϫ2)-O, Rh(100)-(2ϫ2)p4g-O, and Rh(100)-c(2ϫ2)-S surfaces has been investigated using an incident photon energy of 38 eV, along both the ⌫XЈ and ⌫M Ј directions. Local density of states calculations have also been performed for the c(2ϫ2)-O and c(2 ϫ2)-S phases using density-functional theory. For each surface overlayer the angle-resolved photoemission measurements show significant differences in the dispersion of features with binding energies between 3 and 6 eV. These peaks are assigned with reference to the density of states calculations, and the origins of the differences in dispersion are discussed in relation to the different geometric structures.

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“…The coverage of sulfur saturation phase is 0. ML which corresponds to c(2 × 2) structure on Rh(100) surface [11][12][13]. By comparing the integral intensity between submonolayer and S/Rh(100) system (shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Adsorption behavior of (CH3)2S on sputtered and annealed Rh(100) surface by AFM, XPS and NEXAFS

Nomoto

Yagi

Soda

et al. 2006

e-J. Surf. Sci. Nanotechnol.

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The temperature dependent reaction of dimethyl sulfide (CH3)2S : DMS on Rh(100) over the temperature range of 90-300 K and the surface reaction of DMS depending on the morphology of Rh(100) surface have been studied with Atomic Force Microscopy (AFM), X-ray Photoelectron Spectroscopy (XPS) and Sulfur K-edge Near Edge X-ray Absorption Fine Structure (NEXAFS) techniques. DMS molecules adsorb molecularly on 850 K annealed Rh(100) surface at 90 K, and some of DMS are dissociated into methanethiolate CH3S-: MT or atomic sulfur as the temperature of the substrate increases. The temperature dependent reduction of the total coverage of sulfur indicates that some of sulfur-containing molecules desorb from the surface. On the other hand, it is found that DMS decomposes into atomic S on 1000 K annealed Rh(100) surface at 90 K. These results indicate that the dissociative reaction of DMS/Rh(100) is more sensitive to the surface morphology than that of Cu(100).

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Structure determination of Rh(100)-c(2 × 2)-S using the surface extended X-ray absorption fine structure technique

Cited by 11 publications

References 25 publications

The adsorption geometry of sulphur on Ir{100}: A quantitative LEED study

The adsorption geometry of sulphur on Ir{100}: A quantitative LEED study

Angle-resolved photoemission study of half-monolayer O and S structures on the Rh(100) surface

Adsorption behavior of (CH3)2S on sputtered and annealed Rh(100) surface by AFM, XPS and NEXAFS

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