The Reactivity and Structure of Solid Surfaces, Phase II.
Abstract
Atomic and molecular beam scattering has been used along with LEED, Auger spectroscopy, and temperature programmed-desorption to study the structure of silver, platinum, tungsten, and iridium surfaces, and the interaction of helium, neon, argon, krypton, xenon, oxygen, hydrogen, methane, nitrogen, and carbon monoxide with these metal surfaces. Scattering of the rare gases displayed non-diffractive, quasi-elastic scattering for He/Ag(111), inelastic scattering for Ne, Ar, Kr/Ag(111), and trapping-dominated scattering for Xe/Ag(111). Rare gas scattering of He/W(112) gave quasi-elastic diffraction, Ne/W(112) gave inelastic rainbow scattering, and Ar, Kr, Xe/W(112) gave trapping-dominated scattering. The quasi-elastic helium diffraction has been represented well by semi-classical theory which can be extended to other surface scattering problems, including LEED. Scattering of polyatomic molecules has shown, that except for the hydrogenic molecules, rotational coupling is very weak compared to translational coupling. Adsorbed oxygen on Pt(111) results in a (2x2) LEED pattern but the surface mesh of the Pt(110) is unchanged for the adsorption at low temperatures in the reactive state. This surface chemistry on the single crystal plane is sufficient to explain quantitatively the oxygenation of carbon monoxide in a commercial catalytic muffler.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 22, 1976
- Accession Number
- ADA023260
Entities
People
- Robert P. Merrill
Organizations
- University of California, Berkeley