(rus. носитель катализатора otherwise подложка (катализатора)
— an inert or semi-active material used for stabilisation on its surface of particles in an active catalytic phase.
In heterogeneous catalysis
, a carrier is used to prevent agglomeration
or sintering of an active component, helping to maintain a large area of contact between an active substance (see active catalytic phase
) and reagents. The quantity of carrier is usually greater than the quantity of active component applied to it. Critical carrier properties include a large surface
area and porosity
, thermal stability, chemical inertness and high mechanical strength. In some cases, a support may affect the properties of the active phase (“strong metal-support interaction” effect). Carriers may be represented by both natural (clay, holystone, diatom earth, asbestos, etc.) and synthetic materials (active carbons, silica gels, aluminium silicates, aluminium/magnesium/zirconium oxides, etc.).
Metallic platinum (shown with arrows) stabilized on a carrier - aluminum oxide. Author: Andrey V. Smirnov, Lomonosov Moscow State University.
- Smirnov Andrey V.
- Tolkachev Nikolay N.
- Chorkendorff I., Niemantsverdriet J.W. Concept of Modern Catalysis and Kinetics. — Weinheim: WILEY-VCH Verlag GmbH & Co. KGaA, 2003. — 452 pp.
- Krylov O. V. Heterogeneous catalysis. — Moscow.: IKC «Akademkniga», 2004. — 679 pp.