Supercritical carbon dioxide: An inert solvent for catalytic hydrogenation?

Article Abstract:

Various surface species origination from the reaction between CO(sub 2) and H(sub 2) over Al(sub 2)O(sub 3)-supported Pt, Pd Rh, and Ru model catalysts are investigated by attenuated total reflection infrared (ATR-IR) spectroscopy under high-pressure conditions. It is concluded that the selective blocking of active surface sites is crucial for explaining the effect of super critical CO2 (scCO2) as reaction medium.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Industrial Gas Manufacturing, Supercritical Fluids, Industrial gases, Carbon Dioxide, Noble Gases, Gases, Rare, Hydrogenation

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Pt and Pt/Al2O3 thin films for investigation of catalytic solid-liquid interfaces by ATR-IR spectroscopy: CO adsorption, H2-induced reconstruction and surface-enhanced absorption

Article Abstract:

Using physical deposition, thin Pt and Pt/Al2O3 films for attenuated total reflection (ATR)-IR spectroscopy at the Pt solvent interface is characterized. Scanning tunneling microscopy (STM) investigation showed the island structure of the film whereas X-ray photoelectron spectroscopy showed metallic character of Pt.

Usage, Observations, Reflectance spectroscopy, Scanning tunneling microscopy, Adsorption, Platinum compounds, Atomic properties

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Discrimination of active palladium sites in catalytic liquid-phase oxidation of benzyl alcohol

Article Abstract:

The discrimination of active sites exposed on a technical Pd/A[l.sub.2][O.sub.3] catalyst is reported during the liquid-phase oxidative dehydrogenation of benzyl alcohol. It is explained that the specific blocking of the latter sites in the industrially used catalysts leads to improved catalytic performance.

Science & research, Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Palladium, Research, Binding sites (Biochemistry), Active sites (Biochemistry), Oxidation-reduction reaction, Oxidation-reduction reactions, Alcohols, Structure, Report

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