The effects of iron oxide overlayers on Pt for CO oxidation

Siwon Lee; Seunghyun Kim; Taeho Kim; Chao Lin; Woo-Jae Lee; Sang-Joon Kim; Raymond J. Gorte; WooChul Jung

Catalysis Communications (Dec 2022)

The effects of iron oxide overlayers on Pt for CO oxidation

Siwon Lee,
Seunghyun Kim,
Taeho Kim,
Chao Lin,
Woo-Jae Lee,
Sang-Joon Kim,
Raymond J. Gorte,
WooChul Jung

Affiliations

Siwon Lee: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea; Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, United States
Seunghyun Kim: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
Taeho Kim: Center for Environment and Sustainable Resources, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea; Department of Advanced Materials & Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
Chao Lin: Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, United States
Woo-Jae Lee: Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, United States
Sang-Joon Kim: Center for Environment and Sustainable Resources, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea; Department of Advanced Materials & Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
Raymond J. Gorte: Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, United States
WooChul Jung: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea; Corresponding author.

Journal volume & issue: Vol. 172
p. 106549

Abstract

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The influence of iron oxide, FeOx, on Pt for CO oxidation was investigated. A film of FeOx, nominally 0.8-nm thick, was added to a Pt/Al2O3 catalyst by Atomic Layer Deposition. The film was found to wet the Pt surface after oxidation at 773 K and 973 K, as shown by aberration-corrected, transmission electron microscopy. In-situ infrared spectra and CO chemisorption measurements showed that the addition of the FeOx greatly suppressed CO adsorption but enhanced CO oxidation rates due to FeOx-Pt interfaces. The FeOx layer also improved the stability of the catalyst by mitigating the sintering of Pt particles at 973 K.

Published in Catalysis Communications

ISSN: 1566-7367 (Print); 1873-3905 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/catalysis-communications

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