Bimetallic Synergy from a Reaction-Driven Metal Oxide–Metal Interface of Pt–Co Bimetallic Nanoparticles

Bimetallic Synergy from a Reaction-Driven Metal Oxide–Metal Interface of Pt–Co Bimetallic Nanoparticles

Bimetallic alloy nanoparticles (NPs) have unique electronic and geometric properties that are regarded as the origin of bimetallic synergy. However, this issue remains controversial because the surface structure, composition, and oxidation state of bimetallic NPs are altered during the catalytic rea...

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Bibliographic Details
Published in:ACS catalysis Vol. 13; no. 20; pp. 13777 - 13785
Main Authors: Song, Yejin, Kim, Daeho, Hong, Seunghwa, Kim, Taek-Seung, Kim, Ki-Jeong, Park, Jeong Young
Format: Journal Article
Language:English
Published: American Chemical Society 20-10-2023
Subjects:
surface restructuring
metal oxide−metal interface
CO oxidation
bimetallic synergy
operando spectroscopy
Bimetallic nanoparticle
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Summary:Bimetallic alloy nanoparticles (NPs) have unique electronic and geometric properties that are regarded as the origin of bimetallic synergy. However, this issue remains controversial because the surface structure, composition, and oxidation state of bimetallic NPs are altered during the catalytic reaction. Here, we investigate the formation and impact of the Pt–CoO interface on Pt–Co bimetallic NPs using state-of-the-art operando surface techniques, such as ambient-pressure X-ray photoelectron spectroscopy and diffuse reflectance infrared Fourier-transform spectroscopy. The Pt–CoO interfacial structures formed on the surface during the CO oxidation reaction play a key role in enhancing the catalytic activity. Our research indicates that the metal oxide–metal interface in bimetallic NPs provides a clue to bimetallic synergy.
ISSN:2155-5435
2155-5435
DOI:10.1021/acscatal.3c03133