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  Correlating the Synthesis, Structure, and Catalytic Performance of Pt–Re/TiO2 for the Aqueous-Phase Hydrogenation of Carboxylic Acid Derivatives

Haus, M. O., Meledin, A., Leiting, S., Louven, Y., Roubicek, N. C., Moos, S., et al. (2021). Correlating the Synthesis, Structure, and Catalytic Performance of Pt–Re/TiO2 for the Aqueous-Phase Hydrogenation of Carboxylic Acid Derivatives. ACS Catalysis, 11(9), 5119-5134. doi:10.1021/acscatal.0c05612.

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 Creators:
Haus, Moritz O.1, Author
Meledin, Alexander2, 3, Author
Leiting, Sebastian4, Author              
Louven, Yannik1, Author
Roubicek, Nico C.1, Author
Moos, Sven1, Author
Weidenthaler, Claudia4, Author              
Weirich, Thomas E.2, Author
Palkovits, Regina1, Author
Affiliations:
1Lehrstuhl für Heterogene Katalyse und Technische Chemie, RWTH Aachen University, Worringerweg 2, DE-52074 Aachen, Germany, ou_persistent22              
2Gemeinschaftslabor für Elektronenmikroskopie/Institut für Kristallographie, RWTH Aachen University, Ahornstraße 55, DE-52074 Aachen, Germany, ou_persistent22              
3Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C), Forschungszentrum Jülich GmbH, DE-52428 Jülich, Germany, ou_persistent22              
4Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950291              

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Free keywords: platinum; rhenium; hydrogenation; succinic acid; structure−activity; bimetallic catalyst; bifunctional; catalyst preparation
 Abstract: Pt–Re bimetallic catalysts have many applications, ranging from catalytic reforming to the reduction of carboxylic acid derivatives. However, the exact role of Re in these systems has remained a matter of discussion, partly due to the plethora of suggested synthesis protocols and analysis conditions. This study presents an extensive comparison of such literature protocols and the resulting materials. In detail, characterization by N2 physisorption, X-ray diffraction, temperature-programmed reduction, CO pulse chemisorption, Fourier-transform infrared spectroscopy of adsorbed CO, scanning transmission electron microscopy, energy-dispersive X-ray spectroscopy, and in situ X-ray photoelectron spectroscopy is combined with catalytic testing to yield synthesis–structure–activity correlations. Accordingly, the investigated catalysts share common features, such as Pt0 nanoparticles (1–4 nm) decorated with partially reduced Re species (ReOx-y). The remaining rhenium oxide is spread over the TiO2 support and enhances Pt dispersion in sequential impregnation protocols. While differences in the number of active sites (Pt0/ReOx–y) mostly explain catalytic results, small variations in the extent of Re reduction and site composition cause additional modulations. The optimal bimetallic catalyst outperforms Ru/C (previous benchmark) in the reduction of N-(2-hydroxyethyl)succinimide, an important step in the production of a bio-based polyvinylpyrrolidone polymer.

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Language(s): eng - English
 Dates: 2020-12-212021-04-132021-05-07
 Publication Status: Published online
 Pages: 14
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acscatal.0c05612
 Degree: -

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Title: ACS Catalysis
  Abbreviation : ACS Catal.
Source Genre: Journal
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Publ. Info: Washington, DC : ACS
Pages: - Volume / Issue: 11 (9) Sequence Number: - Start / End Page: 5119 - 5134 Identifier: ISSN: 2155-5435
CoNE: https://pure.mpg.de/cone/journals/resource/2155-5435