Chemical Reactions at Clean and Alkali-Doped Mismatched Metal/Metal Interfaces

Politano, Antonio; Formoso, V.; Chiarello, G.

doi:10.1021/jp806832a

Cited by 19 publications

(5 citation statements)

References 57 publications

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“…In fact, such mode is expected around 375-380 and 360-365 meV for the sp 2 and sp 3 hybridization, respectively. 45 The absence of vibrational modes of OH groups at 415-450 meV 47,48 indicates that their adsorption energy is positive in the presence of co-adsorbed H atoms on the MLG sheet, i.e. such species are not stable at 300 K.…”

Section: Methodsmentioning

confidence: 99%

Water adsorption on graphene/Pt(111) at room temperature: A vibrational investigation

et al. 2011

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Water interaction with quasi-freestanding graphene deposited on Pt(111) has been investigated by using vibrational spectroscopy. Loss measurements show that water molecules dosed at room temperature can dissociate giving rise to C-H bonds. The formation of the C-H bonds strongly attenuates the optical phonons of the graphene sheet. On the other hand, at 100 K water has been found to adsorb only in molecular state. Present findings should be taken into account in engineering graphene-based devices which should work at atmospheric pressure and at room temperature

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Section: Methodsmentioning

confidence: 99%

Water adsorption on graphene/Pt(111) at room temperature: A vibrational investigation

et al. 2011

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“…Moreover, the interaction of oxygen with surface alloys is particularly important for studying the corrosion and passivation mechanisms , and for the prospect of selective oxidation of surface atoms of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Segregation and Selective Oxidation of Ni Atoms in Pt₃Ni(111) in a Low-Pressure Oxygen Environment

et al. 2013

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Understanding the microscopic mechanism of oxygen interaction with the surfaces of Pt-based alloys is an important issue for applications in various fields such as corrosion and oxygen reaction reduction in fuel cells, for which Pt-based alloys are more efficient catalysts with respect to platinum. Herein, the interaction of oxygen with Pt 3 Ni(111) has been studied by X-ray photoemission, X-ray absorption, and high-resolution electron energy loss spectroscopies. We have found that the oxidation of Pt 3 Ni( 111) at 600 K leads to the segregation of Ni atoms to the surface region. The presence of Ni atoms at the Pt 3 Ni(111) surface allows O 2 to dissociate to form NiO x surface species. High-resolution electron energy loss spectroscopy measurements performed on Pt(111), Ni(111), and Pt 3 Ni(111) directly show that, on the Pt 3 Ni(111) surface, oxygen binds selectively on Ni sites and, moreover, that the O−Ni bond formed on Pt 3 Ni is weaker than the O−Pt bond formed on Pt(111).

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“…A constant sticking coefficient was assumed to obtain other desired Au and Na coverage. A particular care has been devoted to avoid contamination of alkalis [16,114,132,135].…”

Section: Methodsmentioning

confidence: 99%

O2 dissociation in Na-modified gold ultrathin layer on Cu(111)

Politanoa

Chiarello

2010

Gold Bull

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High-resolution electron energy loss spectroscopy has been used to investigate the catalytic properties of Na-doped Au monolayer grown on Cu(111). The presence of Na atoms allows the dissociation of oxygen molecules and the stabilization of atomic oxygen. The strong reduction of the dissociation barrier for O 2 promoted by Na could readily favor many surface chemical reactions, due to the key role of atomic oxygen in many oxidation processes catalyzed by gold.

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Chemical Reactions at Clean and Alkali-Doped Mismatched Metal/Metal Interfaces

Cited by 19 publications

References 57 publications

Water adsorption on graphene/Pt(111) at room temperature: A vibrational investigation

Water adsorption on graphene/Pt(111) at room temperature: A vibrational investigation

Segregation and Selective Oxidation of Ni Atoms in Pt₃Ni(111) in a Low-Pressure Oxygen Environment

O2 dissociation in Na-modified gold ultrathin layer on Cu(111)

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Chemical Reactions at Clean and Alkali-Doped Mismatched Metal/Metal Interfaces

Cited by 19 publications

References 57 publications

Water adsorption on graphene/Pt(111) at room temperature: A vibrational investigation

Water adsorption on graphene/Pt(111) at room temperature: A vibrational investigation

Segregation and Selective Oxidation of Ni Atoms in Pt3Ni(111) in a Low-Pressure Oxygen Environment

O2 dissociation in Na-modified gold ultrathin layer on Cu(111)

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Segregation and Selective Oxidation of Ni Atoms in Pt₃Ni(111) in a Low-Pressure Oxygen Environment