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Thermal rearrangement of oxygen adsorbed on oxygen-rich Ru(0001)
Surface Science, 2001Abstract Atomic oxygen adsorbed on oxide domains terminating an oxidized Ru(0 0 0 1) surface is marked by its unusually high chemical reactivity as compared to other known oxygen species. We applied thermal desorption spectroscopy employing isotopic labeling to characterize the thermally driven incorporation of these oxygen atoms into the subsurface ...
Böttcher, A., Conrad, H., Niehus, H.
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Surface Science, 1967
Abstract Considerable detailed information may be obtained about the nature of the adsorbate phase and the changes that take place at the adsorbate-adsorbent interface subsequent to the chemisorption of a gas at a metal surface by measurement of rapid changes of the work function of the metal.
T. Delchar, F.C. Tompkins
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Abstract Considerable detailed information may be obtained about the nature of the adsorbate phase and the changes that take place at the adsorbate-adsorbent interface subsequent to the chemisorption of a gas at a metal surface by measurement of rapid changes of the work function of the metal.
T. Delchar, F.C. Tompkins
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Oxygen on Cu(100) – a case of an adsorbate induced reconstruction
Surface Science, 1989Abstract We show that at and above room temperature only a single long range ordered superstructure exists on Cu(100). This is the ( 2 × 2 2 )R45° structure, which corresponds to a saturation coverage of θo = 0.48 ± 0.05. A well-ordered c(2 × 2) superstructure is not observed in the investigated range of adsorption temperatures (Tads = 300–
M. Wuttig, R. Franchy, H. Ibach
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Magnetic Susceptibility of Oxygen Adsorbed on Graphite
Physical Review Letters, 1978The susceptibility of oxygen adsorbed on graphite indicates that magnetic transitions are present even in films of submonolayer thickness. This result contrasts with previous work on amorphous oxygen films and strongly supports the supposition that antiferromagnetic order can only be present simultaneously with configurational order.
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A RHEED study of oxygen adsorbed on copper
Surface Science, 1982Abstract The effect of oxygen adsorption on various clean, stepped copper surfaces at 300°C was examined by the use of Reflection High Energy Electron Diffraction (RHEED). The stability of a few high index planes is considered and the idea of this enhanced stability being due to a “fit” between the adsorption structure and the terrace width was ...
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Phase transition of dissociatively adsorbed oxygen on Ag(001)
Physical Review B, 2000We show that dissociative oxygen adsorption on Ag(001) induces below room temperature a missing row 2 root 2x root 2 reconstruction of the substrate. As demonstrated by the analysis of the photoelectron diffraction patterns, the oxygen atoms sit thereby in a c(2x2) arrangement in the previous fourfold hollow sites nearly coplanar with the Ag atoms ...
ROCCA, MARIO AGOSTINO +12 more
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Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1982
α-Fe2O3 heated in oxygen for one hour at 400 °C exhibits two complex regions of infrared absorption between 1350 and 1250 cm–1(the type A bands at 1350, 1325, 1300 and 1270 cm–1) and between 1100 and 900 cm–1(the type B bands at 1090, 1060, 1035, 1010, 990 and 930 cm–1).
F. Al Mashta +3 more
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α-Fe2O3 heated in oxygen for one hour at 400 °C exhibits two complex regions of infrared absorption between 1350 and 1250 cm–1(the type A bands at 1350, 1325, 1300 and 1270 cm–1) and between 1100 and 900 cm–1(the type B bands at 1090, 1060, 1035, 1010, 990 and 930 cm–1).
F. Al Mashta +3 more
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Oxygen exchange between adsorbed oxygen and cesium-added zeolite X
Microporous Materials, 1997Abstract Oxygen exchange between adsorbed oxygen and the zeolite X which contains cesium ions in excess of the ion-exchange capacity (cesium-added zeolite X) was studied by TPD of adsorbed 18 O 2 . The desorbed oxygen molecules were composed mainly of 18 O 2 and 16 O 2 ; the fraction of 18 O 16 O was small, indicating that a pair of oxygen atoms
Fuyuki Yagi, Hideshi Hattori
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Oxygen exchange between NO gas and adsorbed atomic oxygen on Pt(335)
Surface Science, 1999Abstract We have used temperature-programmed desorption with isotopically labeled gases to study O exchange between gas phase NO and adsorbed atomic O on Pt(335). We find two distinct types of adsorbed O, one of which exchanges at least 40 times faster than the other, at room temperature.
Hong Wang +4 more
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Studies of molecular oxygen adsorbed on Cu surfaces
Surface Science, 1986Molecular oxygen adsorbed on (110) and polycrystalline Cu surfaces has been investigated by UPS, XPS, AES, HREELS and LEED. Molecularly adsorbed $O_2$ on the (110) surface shows the characteristic three-peak HeII spectrum due to $\pi_g$, $\pi_u$ and $\sigma_g$ orbitals, accompanied by an O-O stretching frequency at 660 $cm^{-1}$. On the polycrystalline
Prabhakaran, K, Sen, P, Rao, CNR
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