On the Stability of Pt‐Based Catalysts in HBr/Br 2 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/Br 2 mixture of various concentration regimes were studied and correlated with material str...

Full description

Saved in:
Bibliographic Details
Published in:Helvetica chimica acta 2021-07, Vol.104 (7)
Main Authors: Liu, Qiang, Meissel, Hubert, Sadykov, Ilia, Jones, Simon, Van Dijk, Nick, Rzepka, Przemyslaw, Artiglia, Luca, Ranocchiari, Marco, van Bokhoven, Jeroen A.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
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/Br 2 mixture of various concentration regimes were studied and correlated with material structural properties. The dissolution of metal nanoparticles was enhanced by adding Br 2 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/Br 2 solutions, as shown for the surface‐modified PtIr/C catalysts with organic diamine molecules.
ISSN:0018-019X
1522-2675
DOI:10.1002/hlca.202100082