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

Autor: Liu, Qiang, Meissel, Hubert, Sadykov, Ilia, Jones, Simon, Van Dijk, Nick, Rzepka, Przemyslaw, Artiglia, Luca, Ranocchiari, Marco, van Bokhoven, Jeroen A.
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Helvetica Chimica Acta, 104 (7)
ISSN: 0018-019X
1522-2675
Popis: 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.
Helvetica Chimica Acta, 104 (7)
ISSN:0018-019X
ISSN:1522-2675
Databáze: OpenAIRE
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