High-entropy alloys (HEAs) have emerged as a class of promising electrocatalysts for energy-conversion reactions. In addition to catalytic activity, stability under the reaction conditions is paramount for practical applications. Understanding the dissolution behavior of these multimetallic, complex nanomaterials is therefore essential.
Here, we study the dissolution of Os–Ru–Rh–Ir–Pt alloys of different phase compositions to elucidate the influence of elemental mixing on the stability of the materials. The trends in the elemental dissolution are interpreted through theoretical simulations. Combined with local composition analysis from transmission electron microscopy, we identify how local elemental segregation affects the dissolution behavior of precious metal HEAs.
This study was led by Tatiana Priamushko and Rebecca K. Pittkowski. PhD student in our group Rasmus Rohde and Espen D. Bøjesen contributed to the study by performing the STEM-EDX measurements and analysis, which enabled crucial insights into the effects of elemental mixing. Thanks to all co-authors for the collaboration!
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