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  Synergy between Metallic and Oxidized Pt Sites Unravelled during Room Temperature CO Oxidation on Pt/Ceria

Meunier, F. C., Cardenas, L., Kaper, H., Šmíd, B., Vorokhta, M., Grosjean, R., et al. (2021). Synergy between Metallic and Oxidized Pt Sites Unravelled during Room Temperature CO Oxidation on Pt/Ceria. Angewandte Chemie International Edition. doi:10.1002/anie.202013223.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0007-9FEB-E Version Permalink: https://hdl.handle.net/21.11116/0000-0007-ADF0-7
Genre: Journal Article

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 Creators:
Meunier, Freder C.1, Author
Cardenas, Luis1, Author
Kaper, Helena2, Author
Šmíd, Břetislav3, Author
Vorokhta, Mykhailo3, Author
Grosjean, Rémi2, Author
Aubert, Daniel2, Author
Dembélé, Kassiagé4, Author           
Lunkenbein, Thomas4, Author           
Affiliations:
1Univ Lyon, Université Claude Bernard Lyon, CNRS, IRCELYON, 2 Av. Albert Einstein, 69626 Villeurbanne, France, ou_persistent22              
2Ceramic Synthesis and Functionalization Laboratory, UMR 3080, CNRS/Saint-Gobain CREE, Saint-Gobain Research Provence, 550 Ave Alphonse Jauffret, 84300 Cavaillon, France, ou_persistent22              
3Charles University, Department of Surface and Plasma Science, Faculty of Mathematics and Physics Institution, V Holešovičkách 2, 180 00, Prague, 8 Czech Republic, ou_persistent22              
4Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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 Abstract: Pt‐based materials are widely used as heterogeneous catalysts, in particular for pollutant removal applications. The state of Pt has often been proposed to differ depending on experimental conditions, for example, metallic Pt poisoned with CO being present at lower temperature before light‐off, while an oxidized Pt surface prevails above light‐off temperature. In stark contrast to all previous reports, we show herein that both metallic and oxidized Pt are present in similar proportions under reaction conditions at the surface of ca. 1 nm nanoparticles showing high activity at 30 °C. The simultaneous presence of metallic and oxidized Pt enables a synergy between these phases. The main role of the metallic Pt phase is to provide strong adsorption sites for CO, while that of oxidized Pt supposedly supplies reactive oxygen. Our results emphasize the complex dual oxidic–metallic nature of supported Pt catalysts and platinum's evolving nature under reaction conditions.

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Language(s): eng - English
 Dates: 2020-09-302020-10-262021
 Publication Status: Issued
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/anie.202013223
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Title: Angewandte Chemie International Edition
  Abbreviation : Angew. Chem., Int. Ed.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: 8 Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 1433-7851
CoNE: https://pure.mpg.de/cone/journals/resource/1433-7851