Electronic structure of a Pt(111) Ge surface alloy and adsorbed CO

Fukutani, Katsuyuki; Магкоев, Т. Т.; Murata, Yoshitada; Matsumoto, M.; Kawauchi, Taizo; Magome, Tamotsu; Tezuka, Yoshihiko; Shin, Shik

doi:10.1016/s0368-2048(97)00124-2

Cited by 18 publications

(11 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The other effect is due to electronic structure changes. The desorption temperature of CO decreased from 410 K on Pt(1 1 1) to 330 K on the (5 Â 5)-Ge/Pt(1 1 1) surface alloy due to a small adsorption energy resulting from a change in the Pt electronic structure [32,33]. A similar change of electronic structure of Pt for Ge/Pt(1 0 0) surface was found by XPS as discussed elsewhere [22].…”

Section: Co Adsorptionsupporting

confidence: 70%

STM and LEED observations of a c(2 × 2) Ge overlayer on Pt(1 0 0)

2009

View full text Add to dashboard Cite

Section: Co Adsorptionsupporting

confidence: 70%

STM and LEED observations of a c(2 × 2) Ge overlayer on Pt(1 0 0)

2009

View full text Add to dashboard Cite

“…Since the Pt-Bi bimetallic overlayers studied here present rather a new system, which has not been studied experimentally elsewhere, we would like to compare the obtained results with those reported by Fukutani et al, 36…”

Section: Adsorption Of H Atoms On Pt X Bi 1àx Bimetallic Overlayersmentioning

confidence: 66%

DFT study of adsorption of hydrogen and carbon monoxide on PtxBi1−x/Pt(111) bimetallic overlayers: correlation to surface electronic properties

Pašti¹,

Mentus²

2009

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

Analysis of the electronic properties of Pt(x)Bi(1-x)/Pt(111) bimetallic overlayers was performed by DFT calculation. The positions of the d-band centers and band widths were correlated using a triangular band model. In addition, the adsorption of hydrogen atoms as well as CO tolerance of selected Pt(x)Bi(1-x)/Pt(111) bimetallic overlayers were analysed. Excellent correlation was obtained of the adsorption energies of H and CO with d-band centers of platinum atoms on the studied surfaces. The red shift of Pt-H stretching vibration of adsorbed hydrogen, and decrease of work function upon adsorption of H were predicted. Analysis of hydrogen and CO chemisorption by means of the difference of the projected density of states was performed in order to identify d-states involved in bonding. The results obtained by calculations were compared with the experimental ones, where available.

show abstract

“…18,19 In this model, contrary to the experimentally assumed model, the NWs consist of Ge dimers placed in the Pt lined troughs of a Pt modified Ge͑001͒ reconstructed surface. Because the sticking probability and affinity for CO on Ge is known to be low, 20 while being high for Pt, it would be surprising if CO molecules would adsorb on the NW itself. This leads to the suggestion that the theoretical models, proposed in Refs.…”

Section: Introductionmentioning

confidence: 99%

CO adsorption on Pt-induced Ge nanowires

Vanpoucke

Brocks

2010

Phys. Rev. B

View full text Add to dashboard Cite

Using density-functional theory, we investigate the possible adsorption sites of CO molecules on the recently discovered Pt-induced Ge nanowires (NWs) on Ge(001). Calculated scanning tunneling microscope (STM) images are compared to experimental STM images to identify the experimentally observed adsorption sites. The CO molecules are found to adsorb preferably onto the Pt atoms between the Ge nanowire dimer segments. This adsorption site places the CO molecule in between two nanowire dimers, pushing them outward along the NW direction, blocking the nearest equivalent adsorption sites. This explains the observed long-range repulsive interaction between CO molecules on these Pt-induced nanowires

show abstract

Electronic structure of a Pt(111) Ge surface alloy and adsorbed CO

Cited by 18 publications

References 23 publications

STM and LEED observations of a c(2 × 2) Ge overlayer on Pt(1 0 0)

STM and LEED observations of a c(2 × 2) Ge overlayer on Pt(1 0 0)

DFT study of adsorption of hydrogen and carbon monoxide on PtxBi1−x/Pt(111) bimetallic overlayers: correlation to surface electronic properties

CO adsorption on Pt-induced Ge nanowires

Contact Info

Product

Resources

About