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On the Stability of Pt‐Based Catalysts in HBr/Br 2 Solution
Author(s) -
Liu Qiang,
Meissel Hubert,
Sadykov Ilia,
Jones Simon,
Van Dijk Nick,
Rzepka Przemyslaw,
Artiglia Luca,
Ranocchiari Marco,
Bokhoven Jeroen A.
Publication year - 2021
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.202100082
Subject(s) - chemistry , dissolution , catalysis , nanoparticle , metal , chemical engineering , molecule , diamine , inorganic chemistry , combinatorial chemistry , polymer chemistry , organic chemistry , engineering
Abstract 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.