Atomic structure and peculiarities of the electronic properties of Br layers on Ag(111) at different coverages

Seliverstov, Aleksandr; Muzychenko, D. A.; Volodin, A.; Janssens, Ewald; Haesendonck, Chris Van

doi:10.1016/j.susc.2023.122304

Surface Science

2023

DOI: 10.1016/j.susc.2023.122304

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Atomic structure and peculiarities of the electronic properties of Br layers on Ag(111) at different coverages

Aleksandr Seliverstov

D. A. Muzychenko

A. Volodin

et al.

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2023

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Bromine Adsorption and Thermal Stability on Rh(111): A Combined XPS, LEED and DFT Study

Freiberger,

Steffen,

Waleska‐Wellnhofer

et al. 2023

ChemPhysChem

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This study addresses a fundamental question in surface science: the adsorption of halogens on metal surfaces. Using synchrotron radiation‐based high‐resolution X‐ray photoelectron spectroscopy (XPS), temperature‐programmed XPS, low‐energy electron diffraction (LEED) and density functional theory (DFT) calculations, we investigated the adsorption and thermal stability of bromine on Rh(111) in detail. The adsorption of elemental bromine on Rh(111) at 170 K was followed in situ by XPS in the Br 3d region, revealing two individual, coverage‐dependent species, which we assign to fcc hollow‐ and bridge‐bound atomic bromine. In addition, we find a significant shift in binding energy upon increasing coverage due to adsorbate‐adsorbate interactions. Subsequent heating shows a high thermal stability of bromine on Rh(111) up to above 1000 K, indicating strong covalent bonding. To complement the XPS data, LEED was used to study the long‐range order of bromine on Rh(111): We observe a (√3 × √3)R30° structure for low coverages (≤ 0.33 ML) and a star‐shaped compression structure for higher coverages (0.33 – 0.43 ML). Combining LEED and DFT, we were able to visualize bromine adsorption on Rh(111) in real space for varying coverages.

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Bromine Adsorption and Thermal Stability on Rh(111): A Combined XPS, LEED and DFT Study

Freiberger,

Steffen,

Waleska‐Wellnhofer

et al. 2023

ChemPhysChem

View full text Add to dashboard Cite

show abstract

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Atomic structure and peculiarities of the electronic properties of Br layers on Ag(111) at different coverages

Cited by 1 publication

References 91 publications

Bromine Adsorption and Thermal Stability on Rh(111): A Combined XPS, LEED and DFT Study

Bromine Adsorption and Thermal Stability on Rh(111): A Combined XPS, LEED and DFT Study

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