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Disclosing the Role of Gold on Palladium – Gold Alloyed Supported Catalysts in Formic Acid Decomposition

Barlocco, Ilaria; Capelli, Sofia; Lu, Xiuyuan; Bellomi, Silvio; Huang, Xiaohui 1; Wang, Di ORCID iD icon 1,2; Prati, Laura; Dimitratos, Nikolaos; Roldan, Alberto; Villa, Alberto
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)


Herein, we report the synthesis of preformed bimetallic Pd-Au nanoparticles supported on carbon nanofibers with different Pd : Au atomic ratio (nominal molar ratio: 8–2, 6–4, 4–6, 2–8) and the corresponding Pd and Au monometallic catalysts by sol immobilization method. The obtained materials were characterized thoroughly by Transmission Electron Microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma optical emission spectroscopy (ICP-OES). The catalytic performances of the Pd-Au catalysts were evaluated in the aqueous phase dehydrogenation of formic acid (FA) at room temperature obtaining enhanced activity, stability and selectivity compared to the monometallic systems. In particular, Pd$_{6}$Au$_{4}$ and Pd$_{8}$Au$_{2}$ showed the best combination of catalytic properties, i. e., high selectivity to H$_{2}$ and improved catalytic stability. Density functional theory (DFT) calculations on Pd15, Au15 and Pd9Au6 clusters supported on a carbon sheet were then simulated to provide atomic level understanding to the beneficial effect of gold observed in the experimental results. Au$_{15}$ barely adsorb FA, while Pd$_{15}$ possesses an adsorption energy higher than Pd$_{9}$Au$_{6}$. ... mehr

Postprint §
DOI: 10.5445/IR/1000138358
Veröffentlicht am 06.12.2022
DOI: 10.1002/cctc.202100886
Zitationen: 16
Web of Science
Zitationen: 14
Zitationen: 17
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 07.10.2021
Sprache Englisch
Identifikator ISSN: 1867-3880, 1867-3899
KITopen-ID: 1000138358
HGF-Programm 43.31.01 (POF IV, LK 01) Multifunctionality Molecular Design & Material Architecture
Erschienen in ChemCatChem
Verlag Wiley-VCH Verlag
Band 13
Heft 19
Seiten 4210-4222
Vorab online veröffentlicht am 02.08.2021
Nachgewiesen in Dimensions
Web of Science
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