Facet-Controlled Cu 2 O Support Enhances Catalytic Activity of Pt Nanoparticles for CO Oxidation

• Published in: The journal of physical chemistry letters Vol. 14; no. 23; pp. 5241 - 5248
• Main Authors: Hong, Seunghwa, Kim, Daeho, Kim, Ki-Jeong, Park, Jeong Young
• Format: Journal Article
• Language: English
• Published: United States 15-06-2023
• ISSN: 1948-7185; 1948-7185
• DOI: 10.1021/acs.jpclett.3c00937

The metal-support interaction plays a crucial role in determining the catalytic activity of supported metal catalysts. Changing the facet of the support is a promising strategy for catalytic control via constructing a well-defined metal-support nanostructure. Herein, we developed cubic and octahedral Cu
O supports with (100) and (111) facets terminated, respectively, and Pt nanoparticles (NPs) were introduced. The
characterizations revealed the facet-dependent encapsulation of the Pt NPs by a CuO layer due to the oxidation of the Cu
O support during the CO oxidation reaction. The CuO layer on Pt at cubic Cu
O (Pt/c-Cu
O) significantly enhanced catalytic performance, while the thicker CuO layer on Pt at octahedral Cu
O suppressed CO conversion. The formation of a thin CuO layer is attributed to the dominant Pt-O-Cu bond at the Pt/c-Cu
O interface, which suppresses the adsorption of oxygen molecules. This investigation provides insight into designing high-performance catalysts via engineering the interface interaction.