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Operando IR of Catalytic Reactions Under Microwaves at 5.8 GHz

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Thibault-Starzyk, Frédéric, Neto, Ana, Thomas, Sébastien, Henriques, Carlos and Bond, Gary orcid iconORCID: 0000-0001-5347-2341 (2026) Operando IR of Catalytic Reactions Under Microwaves at 5.8 GHz. Catalysis Today, 472 . p. 115571. ISSN 0920-5861

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Official URL: https://www.doi.org/10.1016/j.cattod.2025.115571

Abstract

A new spectroscopic cell was designed for operando IR observation of heterogeneous catalysis under microwave irradiation. Oxidation of CO on Pt-H-BEA zeolite was performed under conventional and microwave heating at the same space velocity to assess the efficiency of microwave heating, which was confirmed by an infrared in-situ temperature scale. A temperature of 230-240°C was obtained after 2min microwave irradiation. Infrared monitoring evidences a moderate sintering of the platinum particles after microwave irradiation, probably due to hotspots on the metal. Infrared observation indicates a strong perturbation of electron density in the Pt particles by microwave during catalysis.


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