Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces
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1997
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A new type of flame-annealing method has been developed for the preparation of surfaces having either fcc(110)-(1x1) or fcc(110)-(1 x 2) symmetry. In situ X-ray scattering studies show that both the Pt(110)-(1 x 2) and Pt(110)-(1 x 1) surfaces are stable in the potential region between 0 and 1.0 V. Adsorption of CO on the (1 x 2) surface in solution does not induce the (1 x 2)-- gt (1 x 1) transition that is observed in UHV upon adsorption of CO. Nominally identical saturation coverages of hydrogen (H-upd) and COad are observed on the two surfaces, implying that two H-upd atoms or two COad molecules are adsorbed per unit cell of the reconstructed (1 x 2) surface. A significant increase in the interatomic spacing between the first and second layer of the reconstructed (1 x 2) surface occurs upon hydrogen adsorption to full coverage. Occupation of subsurface sites for H-upd are inferred from this result. The (1 x 2) surface is found to have a much higher catalytic activity for the electr...o-oxidation of CO; the anodic oxidation of either COad or dissolved COgas occurs at approximate to 0.3 V lower potential on the (1 x 2) than the (1 x 1) surface.
Keywords:
electrochemical methods / electro-oxidation of CO / hydrogen adsorption / low index single crystal surfaces / surface structure / X-ray scatteringSource:
Surface Science, 1997, 384, 1-3, L805-L814Publisher:
- Elsevier Science Bv, Amsterdam
DOI: 10.1016/S0039-6028(97)00252-5
ISSN: 0039-6028
WoS: A1997XZ01500004
Scopus: 2-s2.0-0031190358
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Marković, NM AU - Grgur, Branimir AU - Lucas, CA AU - Ross, PN PY - 1997 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/130 AB - A new type of flame-annealing method has been developed for the preparation of surfaces having either fcc(110)-(1x1) or fcc(110)-(1 x 2) symmetry. In situ X-ray scattering studies show that both the Pt(110)-(1 x 2) and Pt(110)-(1 x 1) surfaces are stable in the potential region between 0 and 1.0 V. Adsorption of CO on the (1 x 2) surface in solution does not induce the (1 x 2)-- gt (1 x 1) transition that is observed in UHV upon adsorption of CO. Nominally identical saturation coverages of hydrogen (H-upd) and COad are observed on the two surfaces, implying that two H-upd atoms or two COad molecules are adsorbed per unit cell of the reconstructed (1 x 2) surface. A significant increase in the interatomic spacing between the first and second layer of the reconstructed (1 x 2) surface occurs upon hydrogen adsorption to full coverage. Occupation of subsurface sites for H-upd are inferred from this result. The (1 x 2) surface is found to have a much higher catalytic activity for the electro-oxidation of CO; the anodic oxidation of either COad or dissolved COgas occurs at approximate to 0.3 V lower potential on the (1 x 2) than the (1 x 1) surface. PB - Elsevier Science Bv, Amsterdam T2 - Surface Science T1 - Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces EP - L814 IS - 1-3 SP - L805 VL - 384 DO - 10.1016/S0039-6028(97)00252-5 ER -
@article{ author = "Marković, NM and Grgur, Branimir and Lucas, CA and Ross, PN", year = "1997", abstract = "A new type of flame-annealing method has been developed for the preparation of surfaces having either fcc(110)-(1x1) or fcc(110)-(1 x 2) symmetry. In situ X-ray scattering studies show that both the Pt(110)-(1 x 2) and Pt(110)-(1 x 1) surfaces are stable in the potential region between 0 and 1.0 V. Adsorption of CO on the (1 x 2) surface in solution does not induce the (1 x 2)-- gt (1 x 1) transition that is observed in UHV upon adsorption of CO. Nominally identical saturation coverages of hydrogen (H-upd) and COad are observed on the two surfaces, implying that two H-upd atoms or two COad molecules are adsorbed per unit cell of the reconstructed (1 x 2) surface. A significant increase in the interatomic spacing between the first and second layer of the reconstructed (1 x 2) surface occurs upon hydrogen adsorption to full coverage. Occupation of subsurface sites for H-upd are inferred from this result. The (1 x 2) surface is found to have a much higher catalytic activity for the electro-oxidation of CO; the anodic oxidation of either COad or dissolved COgas occurs at approximate to 0.3 V lower potential on the (1 x 2) than the (1 x 1) surface.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Surface Science", title = "Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces", pages = "L814-L805", number = "1-3", volume = "384", doi = "10.1016/S0039-6028(97)00252-5" }
Marković, N., Grgur, B., Lucas, C.,& Ross, P.. (1997). Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces. in Surface Science Elsevier Science Bv, Amsterdam., 384(1-3), L805-L814. https://doi.org/10.1016/S0039-6028(97)00252-5
Marković N, Grgur B, Lucas C, Ross P. Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces. in Surface Science. 1997;384(1-3):L805-L814. doi:10.1016/S0039-6028(97)00252-5 .
Marković, NM, Grgur, Branimir, Lucas, CA, Ross, PN, "Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces" in Surface Science, 384, no. 1-3 (1997):L805-L814, https://doi.org/10.1016/S0039-6028(97)00252-5 . .