- Tytuł:
-
Gold catalysts supported on zeolites
Katalizatory złotowe osadzone na zeolitach - Autorzy:
- Walkowiak, Adrian
- Powiązania:
- https://bibliotekanauki.pl/articles/2057912.pdf
- Data publikacji:
- 2021
- Wydawca:
- Polskie Towarzystwo Chemiczne
- Tematy:
-
heterogeniczne katalizatory złotowe
nanocząstki złota
zeolity
metody modyfikacji zeolitów złotem
zastosowanie zeolitów modyfikowanych złotem
proces katalityczny
heterogeneous gold catalysts
gold nanoparticles
zeolites
methods of zeolites modification with gold
application of gold-modified zeolites
catalytic process - Opis:
- Heterogeneous gold catalysis is a relatively young but dynamically developing field of chemistry. At the end of the 1980s, Masatake Haruta and Graham Hutchings provided experimental evidence of high activity of supported gold catalysts in CO oxidation and acetylene hydrochlorination. Thus, these two researchers challenged the prevailing chemists’ belief that gold is almost completely chemically inert and catalytically inactive. Since then, gold catalysis has been constantly in the centre of attention of a wide array of scientists from around the world. However, there are still many questions about the nature of catalysts containing this noble metal, which inspires in-depth research in this field. From among various potential supports for gold heterogeneous catalysts, zeolites have drawn much attention thanks to several unique properties of this group of materials, among which the most important are high thermal stability and the presence of a system of pores of strictly defined sizes. Zeolites have extremely large surface area, which is desirable to obtain high dispersion of the active phase. The article provides a concise overview of the methods of gold nanoparticles deposition on zeolitic supports and catalytic applications of such materials. The first chapter sheds light on the properties of bulk and nano-sized Au and depicts the background of gold catalysis development. In the following part, a brief description of zeolites and their properties is delivered. The third chapter is devoted entirely to the description of several preparation methods of zeolite-supported gold catalysts and their applications in different catalytic processes. The following post-synthetic methods of zeolite modification with gold are described: impregnation, ion exchange, deposition-reduction, chemical vapour deposition, and grafting. The most important advantages and disadvantages of each method are summarized. The article concludes with a résumé of literature reports concerning the use of zeolitesupported gold catalysts in various processes. Special attention was paid to selective oxidation of alcohols and biomass-derived chemicals (e.g. glucose).
- Źródło:
-
Wiadomości Chemiczne; 2021, 75, 11-12; 1259--1293
0043-5104
2300-0295 - Pojawia się w:
- Wiadomości Chemiczne
- Dostawca treści:
- Biblioteka Nauki
Artykuł