Nanoscaled palladium catalysts on activated carbon support

I. Simakova; A. Koskin; I. Deliy; A. Simakov

doi:10.1117/12.616317

20 September 2005 Nanoscaled palladium catalysts on activated carbon support "Sibunit" for fine organic synthesis

I. Simakova, A. Koskin, I. Deliy, A. Simakov

Proceedings Volume 5924, Complex Mediums VI: Light and Complexity; 592413 (2005) https://doi.org/10.1117/12.616317
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The application of nanosized palladium catalysts has gained growing importance over the last few years. Palladiumbased catalytic methods for fine organic synthesis permits the replacement of traditional labor-consuming techniques in multi-step organic syntheses and provides an improvement from the standpoint of cost and environmental impact. The use of activated carbon "Sibunit" as a substrate for catalysts has been fostered by the substrate's high surface area, chemical inertness both in acidic and basic media, and at the same time by the absence of very strong acidic centers on its surface which could promote undesirable side reactions during the catalytic run. A conversion of alpha-pinene derivatives to commercial biologically active compounds and fragrances as well as sun screens with ultra violet filtering properties, involves a catalytic hydrogenation as a key intermediate step. The aim of the present work is to clarify the factors favoring the dispersion of Pd metal on carbon. The effect of reduction temperature and pretreatment of the carbon surface on metal size during preparation of Pd on "Sibunit" catalysts for selective verbenol conversion was studied. The electron microscopy method (TEM) was used to show the influence on Pd metal dispersion of carbon surface oxidation by the oxidant H₂O₂, HNO₃. The catalytic activity of Pd/C catalyst samples in verbenol hydrogenation reaction was determined. Kinetic peculiarities of verbenol hydrogenation over the most active catalyst sample were obtained.

Citation Download Citation

I. Simakova, A. Koskin, I. Deliy, and A. Simakov "Nanoscaled palladium catalysts on activated carbon support "Sibunit" for fine organic synthesis", Proc. SPIE 5924, Complex Mediums VI: Light and Complexity, 592413 (20 September 2005); https://doi.org/10.1117/12.616317

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KEYWORDS

Palladium

Carbon

Hydrogen

Particles

Metals

Oxidation

Transmission electron microscopy

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