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Rola nośnika i/lub modyfikatorów w kształtowaniu właściwości katalizatorów złotowych stosowanych w procesach utleniania

Walkowiak Adrian

Wiadomości Chemiczne

2025

[Z] 79, 11-12

943--975

Since the ground-breaking discoveries of Haruta and Hutchings in the 1980s, heterogeneous gold-based catalysts have attracted significant attention due to their outstanding performance in various oxidation reactions under relatively mild conditions. Their catalytic properties, including activity, selectivity, and stability, are strongly influenced by the size, dispersion, morphology, and electronic state of Au nanoparticles, which are in turn governed by the choice of support and the presence of modifiers. Supports play a crucial role not only in stabilizing and dispersing gold nanoparticles but also in shaping metal−support interactions and providing additional active sites (e.g., acidic or basic sites). Modifiers - such as additional metals, nonmetals, or oxoanions - can further tune the electronic and structural properties of gold phase, surface acidity or basicity, and long-term stability. This work provides a comprehensive overview of scientific studies highlighting the role of supports and modifiers in shaping the performance of heterogeneous gold catalysts in oxidation processes.

CO oxidation over the Au catalyst - the state of art

Dobrosz I., Kocemba I., Rynkowski J.M.

Polish Journal of Chemical Technology

2005

Vol. 7, nr 3

27-34

Gold catalysts have recently been attracting rapidly growing interest due to their potential applications to many reactions, of both industrial and environmental importance. The oxidation of CO is one of the significant reactions. This article presents an overview of the recent study on more important factors that determine the catalytic activity of supported gold catalysts in CO oxidation reaction, with an emphasis on those that provide some information on the underlying chemistry. The criteria that must be met before high catalytic activity can be obtained, and the extreme sensitivity of the final catalyst to all stages of its preparation and treatment before use, are summarized. The influence of the preparation method, the size of the gold particle, the nature of the support and the effect of chloride on the catalysts performance as well as a conclusive analysis of the mechanism of CO oxidation over supported gold catalysts were presented.