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Deposition of Pd, Pt, and PdPt Nanoparticles on TiO2 Powder Using Supercritical Fluid Reactive Deposition: Application in the Direct Synthesis of H2O2

Crone, Marlene 1; Trinkies, Laura L. ORCID iD icon 2; Dittmeyer, Roland 2; Türk, Michael ORCID iD icon 1
1 Institut für Technische Thermodynamik und Kältetechnik (TTK), Karlsruher Institut für Technologie (KIT)
2 Institut für Mikroverfahrenstechnik (IMVT), Karlsruher Institut für Technologie (KIT)

Abstract:

In this study, we investigated the catalytic properties of mono- and bimetallic palladium
(Pd) and platinum (Pt) nanoparticles deposited via supercritical fluid reactive deposition (SFRD)
on titanium dioxide (TiO2) powder. Transmission electron microscopy analyses verified that SFRD
experiments performed at 353 K and 15.6 MPa enabled the deposition of uniform mono- and bimetallic
nanoparticles smaller than 3 nm on TiO2. Electron-dispersive X-ray spectroscopy demonstrated
the formation of alloy-type structures for the bimetallic PdPt nanoparticles. H2O2 is an excellent
oxidizing reagent for the production of fine and bulk chemicals. However, until today, the design
and preparation of catalysts with high H2O2selectivity and productivity remain a great challenge.
The focus of this study was on answering the questions of (a) whether the catalysts produced are
suitable for the direct synthesis of hydrogen peroxide (H2O2) in the liquid phase and (b) how the
metal type affects the catalytic properties. It was found that the metal type (Pd or Pt) influenced
the catalytic performance strongly; the mean productivity of the mono- and bimetallic catalysts
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Zugehörige Institution(en) am KIT Institut für Mikroverfahrenstechnik (IMVT)
Institut für Technische Thermodynamik und Kältetechnik (TTK)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 05.05.2024
Sprache Englisch
Identifikator ISSN: 1420-3049
KITopen-ID: 1000170532
HGF-Programm 38.03.02 (POF IV, LK 01) Power-based Fuels and Chemicals
Erschienen in Molecules
Verlag MDPI
Band 29
Heft 9
Seiten Art.-Nr.: 2142
Nachgewiesen in Dimensions
Web of Science

Verlagsausgabe §
DOI: 10.5445/IR/1000170532
Veröffentlicht am 08.05.2024
Seitenaufrufe: 74
seit 08.05.2024
Downloads: 26
seit 12.05.2024
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