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Journal Article

Regular Mixing in a Two-Dimensional Lattice System: The Coadsorption of N and O on Ru(0001)

MPS-Authors
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Nagl,  Christian
Fritz Haber Institute, Max Planck Society;

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Schuster,  Rolf
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Renisch,  Steffen
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Ertl,  Gerhard
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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PhysRevLett.81.3483.pdf
(Publisher version), 416KB

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Citation

Nagl, C., Schuster, R., Renisch, S., & Ertl, G. (1998). Regular Mixing in a Two-Dimensional Lattice System: The Coadsorption of N and O on Ru(0001). Physical Review Letters, 81(16), 3483-3486. doi:10.1103/PhysRevLett.81.3483.


Cite as: https://hdl.handle.net/21.11116/0000-0007-3198-6
Abstract
The coadsorption of N and O on Ru(0001) has been studied by scanning tunneling microscopy; by this technique we can distinquish between the two atomic adsorbates. N and O form a dense intermixed 2×2 phase in equilibrium with a dilute lattice gas. The two-dimensional “vapor pressure” of N, i.e., its concentration in the lattice gas, has been determined for various ratios of N and O in the dense phase by adjusting the total coverage of N and O. The resulting vapor pressure curve indicates a positive enthalpy of mixing, due to relatively weak N-O interactions in the dense phase.