Dresden 2026 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 11: Structurally and Chemically Complex Alloys
MM 11.3: Talk
Tuesday, March 10, 2026, 10:45–11:00, SCH/A215
Preparation of an impurity-free quinary alloy surface without significant changes in composition — •Yong-He Pan1, Niklas Osterloh1, Wun-Chang Pan1, Natalia Pukhareva2, Alfred Ludwig2, and Karina Morgenstern1 — 1Physical Chemistry I, Ruhr University Bochum, Universitätsstr. 150, 44780 Bochum, Germany — 2Centre for Interface-Dominated High-Performance Materials (ZGH), Ruhr University Bochum, Universitätsstr. 150, 44780 Bochum, Germany
Compositionally Complex Solid Solutions (CCSSs) are a promising new pathway to electrochemical catalysts [1,2]. Their complex surface offers multiple adsorption sites for different reaction steps simultaneously [3]. We investigated the composition of the surface elements and impurities using X-ray photoelectron spectroscopy. The quinary alloy sample Ag-Au-Ir-Pd-Pt was prepared in ultra-high vacuum by argon sputtering and annealing. Surface impurities were removed by sputtering, and the alloy composition remained stable even during prolonged thermal treatment. Optimal sputtering and annealing parameters for achieving a clean surface were established. This study clarifies the effects of these processes on the surface composition ratio of Ag-Au-Ir-Pd-Pt alloys.
[1] H. J. Qiu et al., J. Mater. Chem. A, 2019, 7, 6499 [2] T. Löffler et al., Angew. Chem. Int. Ed. 2021, 60, 26894 [3] J. K. Pedersen et al., ACS Catal. 2020, 10, 2169
Keywords: Compositionally Complex Solid Solutions; High entropy alloy; X-ray photoelectron spectroscopy