High entropy 2D metals sulfides: Fast synthesis, exfoliation and electrochemical activity in overall water splitting at alkaline pH

Buravets, Vladislav; Miliutina, Elena; Burtsev, Vasilii; Severa, Kamil; Shilenko, Vera; Rosenkranzova, Jana; Hönicke, Philipp; Hrbek, Tomás; Svorcik, Vaclav; Lyutakov, Oleksiy

doi:https://doi.org/10.1016/j.apsusc.2024.161600

Zugriffsnummer	53191
Dokumenttyp	Zeitschriftenartikel
Peer Review	mit Peer Review
Sprache	Englisch
Titel	High entropy 2D metals sulfides: Fast synthesis, exfoliation and electrochemical activity in overall water splitting at alkaline pH
Autor(in); Institution	Buravets, Vladislav; Department of Solid State Engineering, University of Chemistry and Technology, Prague, CZECH REPUBLIC Miliutina, Elena; Department of Solid State Engineering, University of Chemistry and Technology, Prague, CZECH REPUBLIC Burtsev, Vasilii; Department of Solid State Engineering, University of Chemistry and Technology, Prague, CZECH REPUBLIC Severa, Kamil; Department of Solid State Engineering, University of Chemistry and Technology, Prague, CZECH REPUBLIC Shilenko, Vera; Department of Solid State Engineering, University of Chemistry and Technology, Prague, CZECH REPUBLIC Rosenkranzova, Jana; Department of Solid State Engineering, University of Chemistry and Technology, Prague, CZECH REPUBLIC Hönicke, Philipp; 7.2, Röntgenmesstechnik mit Synchrotronstrahlung, PTB-Berlin; Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, GERMANY Hrbek, Tomás; Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague, CZECH REPUBLIC Svorcik, Vaclav; Department of Solid State Engineering, University of Chemistry and Technology, Prague, CZECH REPUBLIC Lyutakov, Oleksiy; Department of Solid State Engineering, University of Chemistry and Technology, Prague, CZECH REPUBLIC
Quelle/Jahr	Applied Surface Science: 681 (2024), 1 - 8
Artikelnummer	161600
ISSN	0169-4332 (print) ; 1873-5584 (online)
DOI	https://doi.org/10.1016/j.apsusc.2024.161600
Verlag	Amsterdam: Elsevier
Freie Schlagworte	High entropy sulfides ; Overall water splitting ; HER ; OER
Zusammenfassung	Novel simple and efficient method for synthesis of 2D high entropy sulfides of iron group metals is described. The method utilizes inorganic salts as precursors and CS₂ as a sulfurizing agent, which makes it possible to achieve high entropy composition through combination of freezing of the precursor solution, subsequent freeze-drying step, sulfurization, and exfoliation in liquid nitrogen. The created material was investigated as a catalyst for electrochemical water splitting at different pH. Measured overpotentials at 10 and 100 mAcm^-2 current densities for hydrogen evolution reaction (HER) were found to be 49 and 315 mV respectively, while for oxygen evolution reaction (OER) the overpotentials required for reaching 10 and 100 mAcm^-2 current densities were 370 and 591 mV respectively, both in 1 M KOH solution. The Tafel slopes for HER were found to be 235, 105, and 111 mV/dec in basic, neutral, and acidic conditions, respectively, while only 63 mV/dec for OER in basic conditions. The calculated values of the turnover frequency were 0.62 s^-1 for HER and 0.10 s^-1 for OER. We also confirmed the key role of high entropy in the catalytic activity of the material by excluding individual elements from the composition of the HES.

Kostenfreier Zugang	Open Access Hybrid
Rechteinformation	CC BY 4.0 ; Creative Commons Attribution 4.0 License

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Buravets, V., Miliutina, E., Burtsev, V., Severa, K., Shilenko, V., Rosenkranzova, J., Hönicke, P., Hrbek, T., Svorcik, V., & Lyutakov, O. (2024). High entropy 2D metals sulfides: Fast synthesis, exfoliation and electrochemical activity in overall water splitting at alkaline pH. Applied Surface Science, 681, 1–8. https://doi.org/10.1016/j.apsusc.2024.161600

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