Defect enhanced carbon monoxide oxidation at elevated oxygen pressures on a Pt/Al2O3 thin film

Article Abstract:

In situ soft X-ray techniques and ultrahigh vacuum (UHV) temperature-programmed reaction spectroscopy (TRS) are used to study the carbon monoxide oxidation on a well-characterized supported platinum thin film over the 100-1000 K temperature range and in pressures ranging from UHV to 0.01 Torr. These techniques have provided information on the role of defects during CO oxidation on platinum catalyst surfaces.

Semiconductors and related devices, Semiconductor and Related Device Manufacturing, All Other Miscellaneous Chemical Product and Preparation Manufacturing, Catalysts, Thin Film Materials, Chemical preparations, not elsewhere classified, Spectrum analysis, Spectroscopy, Thin films, Dielectric films, Properties

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Molecular mechanisms of propyne oxidation on the Pt(111) surface: in situ soft X-ray studies in pressures of oxygen

Article Abstract:

Oxidation of preadsorbed is characterized on the Pt(111) surface in oxygen at pressures up to 0.009 Torr using fluorescence yield ultrasoft X-ray adsorption methods are discussed. Oxidation of a saturated propyne monolayer in oxygen pressures results in a rapid decrease in carbon coverage over the same temperature range.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Platinum, Monomolecular films

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Enhanced low-temperature CO oxidation on a stepped platinum surface for oxygen pressure above 10(super -5) Torr

Article Abstract:

The rate of CO oxidation was characterized on the stepped Pt(411) surface for oxygen pressures up to 10(super -5) Torr, over the 100-1000 K temperature range. The experimental results indicated that the surface defects play a key role in increasing the sensitivity of CO oxidation to oxygen pressure.

Oxidation-reduction reaction, Oxidation-reduction reactions, Platinum compounds, Chemical properties

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