On the Stability of Pt‐Based Catalysts in HBr/Br2 Solution

Stability studies on supported metal nanoparticles are essential for gaining insight into the design and optimization of high‐performance materials. In this work, the dissolutions of Pt‐based catalysts in HBr/Br2 mixture of various concentration regimes were studied and correlated with material stru...

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Bibliographic Details
Published in:Helvetica chimica acta 2021-07, Vol.104 (7), p.n/a
Main Authors: Liu, Qiang, Meissel, Hubert, Sadykov, Ilia, Jones, Simon, Van Dijk, Nick, Rzepka, Przemyslaw, Artiglia, Luca, Ranocchiari, Marco, Bokhoven, Jeroen A.
Format: Article
Language:English
Subjects:
Alloying
bromine
Catalysts
Design optimization
Diamines
Dissolution
Gold
High resistance
hydrobromic acid
metal dissolution
Nanoparticles
Stability
supported catalysts
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Summary:Stability studies on supported metal nanoparticles are essential for gaining insight into the design and optimization of high‐performance materials. In this work, the dissolutions of Pt‐based catalysts in HBr/Br2 mixture of various concentration regimes were studied and correlated with material structural properties. The dissolution of metal nanoparticles was enhanced by adding Br2 to the HBr solution. Comparing with commercial Pt/C catalyst, the well‐alloyed PtIr/C catalyst was observed to exhibit high resistance towards dissolution. In addition, regulating the accessibility of the metal sites to dissolution‐inducing species contributed to the marked stability of the nanoparticles in HBr/Br2 solutions, as shown for the surface‐modified PtIr/C catalysts with organic diamine molecules.
ISSN:0018-019X
1522-2675
DOI:10.1002/hlca.202100082