CO adsorption studies on a stepped Cu(111) surface

Bönicke, Ilva A.; Kirstein, W.; Spinzig, S.; Thieme, F.

doi:10.1016/0039-6028(94)90044-2

Cited by 60 publications

(39 citation statements)

References 18 publications

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“…The calculated adsorption energy of H is À2.22 eV, which is in fair agreement with the experimental value of À2.45 ±0.05 eV [62]. CO binds to the surface with À0.41 eV, which agrees well with the experimental value of À0.52 ± 0.05 eV [63,64]. The binding energies of the other adsorbates can only be compared to the values obtained in the previous DFT studies, which all report stronger binding than what is observed in our work.…”

Section: Resultssupporting

confidence: 84%

The energies of formation and mobilities of Cu surface species on Cu and ZnO in methanol and water gas shift atmospheres studied by DFT

Rasmussen

Janssens

Temel

et al. 2012

Journal of Catalysis

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Section: Resultssupporting

confidence: 84%

The energies of formation and mobilities of Cu surface species on Cu and ZnO in methanol and water gas shift atmospheres studied by DFT

Rasmussen

Janssens

Temel

et al. 2012

Journal of Catalysis

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“…Generally, Cu has been widely shown to be a highly active catalyst for CO reduction to form hydrocarbons. [20,23] In our case, Au-Cu alloy favors CO desorption from the Au atom and boosts the formation of hydrogenation species on the Cu atom. This might be the main reason why the Au-Cu alloy effect works for hydrocarbon species but not for the CO formation.…”

Section: Methodsmentioning

confidence: 62%

“…According to previous report, CO 2 is first deoxygenated to form CO, and then gradually reduced to CH 4 and other hydrocarbon fuels. [4a] Since the activation energy associated with the CO desorption is much lower on Au (E a = 38 kJ mol À1 ) [19] than that on Cu (E a = 67 kJ mol À1 ), [20] desorption of CO from the Au surface is kinetically favored. So the Au-Cu alloy co-catalysts with higher Au fraction show higher selectivity for CO formation.…”

Section: Methodsmentioning

confidence: 99%

Photocatalytic Reduction of Carbon Dioxide by Hydrous Hydrazine over Au–Cu Alloy Nanoparticles Supported on SrTiO₃/TiO₂ Coaxial Nanotube Arrays

et al. 2014

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Efficient photocatalytic conversion of CO2 into CO and hydrocarbons by hydrous hydrazine (N2H4⋅H2O) is achieved on SrTiO3/TiO2 coaxial nanotube arrays loaded with Au-Cu bimetallic alloy nanoparticles. The synergetic catalytic effect by the Au-Cu alloy nanoparticles and the fast electron-transfer in SrTiO3/TiO2 coaxial nanoarchitecture are the main reasons for the efficiency, while N2H4⋅H2O as the H source and electron donor provides a reducing atmosphere to protect the surface Cu atoms from oxidation, therefore maintaining the alloying effect which is the basis for the high photocatalytic activity and stability. This approach opens a feasible route to enhance the photocatalytic efficiency, which also benefits the development of photocatalysts and co-catalysts.

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“…On stepped Cu surfaces, CO is probably the most widely studied adsorbate. CO preferentially adsorbs at step sites, with the carbon atom next to the Cu atom at the top of the step edge [2][3][4][5]. The goals of this study are to probe the sites for reaction of ethyl groups and the sites for iodine atom binding on the stepped Cu(2 2 1) surface.…”

Section: Comparison Of Co Adsorption On Low and High Miller Index Pt mentioning

confidence: 99%

Ethyl iodide decomposition on Cu(111) and Cu(221)

Sung

Gellman

2004

Surface Science

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Ethyl iodide decomposition on the Cu(1 1 1) and Cu(2 2 1) surfaces has been studied using thermal desorption spectroscopy and high resolution electron energy loss spectroscopy. On both surfaces ethyl iodide decomposes to produce ethyl groups and adsorbed iodine atoms. The ethyl groups decompose by b-hydride elimination to desorb as ethylene leaving adsorbed iodine atoms. The kinetics of b-hydride elimination on the Cu(2 2 1) surface are similar to those on the Cu(1 1 0) surface suggesting that the ethyl groups are reacting at the (1 1 0) step edges rather than on the (1 1 1) terraces. Vibrational spectra of the iodine atoms remaining on the surfaces after decomposition of the ethyl groups have been used to probe the iodine binding sites and to corroborate predictions based on density functional theory that the iodine atoms bind to the tops of the step edges. Iodine atoms on Cu(1 1 1) exhibit vibrational modes at 130 and 235 cm À1 that we assign empirically to in-plane and out-of-plane vibrations, respectively, of iodine atoms adsorbed at fcc sites on the (1 1 1) plane. On the stepped Cu(2 2 1) surface an additional peak appears at 80 cm À1 arising from iodine adsorbed at the step edges. The fact that this mode is at a lower frequency than the in-plane mode on the Cu(1 1 1) surface suggests that the iodine atom is adsorbed at the top of the step edge where its motion is unconstrained. These experimental results are consistent with the theoretical prediction that iodine atoms adsorb at the top of the step edges on the Cu(2 2 1) surface.

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CO adsorption studies on a stepped Cu(111) surface

Cited by 60 publications

References 18 publications

The energies of formation and mobilities of Cu surface species on Cu and ZnO in methanol and water gas shift atmospheres studied by DFT

The energies of formation and mobilities of Cu surface species on Cu and ZnO in methanol and water gas shift atmospheres studied by DFT

Photocatalytic Reduction of Carbon Dioxide by Hydrous Hydrazine over Au–Cu Alloy Nanoparticles Supported on SrTiO₃/TiO₂ Coaxial Nanotube Arrays

Ethyl iodide decomposition on Cu(111) and Cu(221)

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CO adsorption studies on a stepped Cu(111) surface

Cited by 60 publications

References 18 publications

The energies of formation and mobilities of Cu surface species on Cu and ZnO in methanol and water gas shift atmospheres studied by DFT

The energies of formation and mobilities of Cu surface species on Cu and ZnO in methanol and water gas shift atmospheres studied by DFT

Photocatalytic Reduction of Carbon Dioxide by Hydrous Hydrazine over Au–Cu Alloy Nanoparticles Supported on SrTiO3/TiO2 Coaxial Nanotube Arrays

Ethyl iodide decomposition on Cu(111) and Cu(221)

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Photocatalytic Reduction of Carbon Dioxide by Hydrous Hydrazine over Au–Cu Alloy Nanoparticles Supported on SrTiO₃/TiO₂ Coaxial Nanotube Arrays