ISSN:
0941-1216
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Differences in the Total Oxidation of Organic Compounds on Heterogeneous Pt- and Pd-CatalystsThe catalytic oxidation of selected organic compounds was studied on supported Pd and Pt catalysts and on massive wires. Unfunctionalized (Decane), unsaturated (dodecene, benzene), oxygen containing (1-octanol, formaldehyde, acetone, n-butylacetate, formic acid), nitrogen containing (aniline, pyridine), sulfur containing (thiophene) and chlorinated (1,2-dichloroethane) hydrocarbons were used as model compounds. The relative activity of the metals for oxidation of the various compounds was determined from the turnover frequencies. While platinum is more active for the oxidation of the unfunctionalized, aromatic and chlorinated compounds, palladium is more active for nitrogen and sulfur containing compounds and for formic acid. No specificity is found for alkenes and compounds with a lower oxygen content. In the presence of octane, the unreactive pyridine is much more effectively oxidized than pyridine alone.There are distinct differences for the oxidation of octane/pyridine mixtures on bimetallic, mixed and pure Pt- and Pd-catalysts. The bimetallic catalyst and the pure Pt-catalyst dominate with respect to conversion and selectivity. The oxidation of linear alkanes on Pt correlates with the boiling point. Pd catalyzes the oxidation of lower hydrocarbons (〈 C5) better, while higher hydrocarbons ( 〉 C5) are better oxidized by Pt.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19923340603
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