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- W2479698223 abstract "Over the last several years surface science techniques such as XPS, AES, and SIMS have been used to study the surfaces of catalysts with varying degrees of success. Low Energy Ion Scattering Spectroscopy (LEISS), also known as Ion Scattering Spectroscopy (ISS), has in general not received as much attention as the other techniques, although LEISS offers unique surface sensitivity to the topmost atomic layer of a catalyst or, under different conditions, to the second or third layer. We have used LEISS to study supported metal, metal oxide, and metal sulfide catalysts. With single crystal layered sulfides such as MoS2, conditions were adjusted so that first layer analysis was possible. The top layer was sulfur and the second layer was Mo. Support of MoS2 on alumina causes distinctly different spectra from the unsupported material which suggests that the crystal orientations differ. In addition, contaminants such as Na or K, which sometimes can unexpectedly dominate a surface, are also clearly seen by LEISS, while other substances such as carbon, which may be abundant on a surface, are difficult to see because their scattering cross-section is so small. In such cases combination of LEISS with XPS or SIMS can provide unique and invaluable information about catalysts." @default.
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- W2479698223 date "1985-10-16" @default.
- W2479698223 modified "2023-09-25" @default.
- W2479698223 title "Low-Energy Ion-Scattering Spectroscopy: Applications to Catalysts" @default.
- W2479698223 doi "https://doi.org/10.1021/bk-1985-0288.ch012" @default.
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