The Sintering of Au Nanoparticles on Flat {100}, {111} and Zigzagged {111}-Nanofacetted Structures of Ceria and Its Influence on Catalytic Activity in CO Oxidation and CO PROX

• Published in: Catalysis letters Vol. 151; no. 4; pp. 1080 - 1090
• Main Authors: Bezkrovnyi, O. S., Kraszkiewicz, P., Mista, W., Kepinski, L.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.04.2021; Springer; Springer Nature B.V
• Subjects: Carbon monoxide; Catalysis; Catalytic activity; Cerium; Cerium oxides; Chemistry; Chemistry and Materials Science; Gold; Industrial Chemistry/Chemical Engineering; Morphology; Nanoparticles; Organometallic Chemistry; Oxidation; Oxidation-reduction reaction; Physical Chemistry; Reducing atmospheres; Sintering; Thermal stability; Nanofacetes; Co–oxidation; Sintering; TPR; CO PROX; H; Ceria support; Au nanoparticles
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-020-03370-1

The thermal stability of Au nanoparticles on ceria support of various morphology (nanocubes, nanooctahedra, and {111}-nanofacetted nanocubes) in oxidizing and reducing atmospheres was investigated by electron microscopy. A beneficial effect of the reconstruction of edges of ceria nanocubes into zigzagged {111}-nanofacetted structures on the inhibition of sintering of Au nanoparticles was shown. The influence of different morphology of Au particles on various ceria supports on the reducibility and catalytic activity in CO oxidation, and CO PROX of Au/ceria catalysts was also investigated and discussed. It was shown, that ceria nanocubes with flat {110} terminated edges are more suitable as a support for Au nanoparticles, used to catalyze CO oxidation, than zigzagged {111}- nanofacetted structures. Graphic Abstract