Structural reconfiguration of an Ru-bearing high-entropy sulfide into an efficient alkaline oxygen evolution catalyst

Abstract

High-entropy sulfides (HESs) with multiple metals are one of the most promising electrocatalysts, but the ambiguous self-reconstruction mechanism greatly hinders their further practical applications in water electrolysis. Here, an Ru-bearing high-entropy sulfide (FeCoNiCuRu)S2 was prepared by employing a facile high-pressure and high-temperature (HPHT) method. The obtained high-entropy sulfide (FeCoNiCuRu)S2 exhibited excellent OER performance and robust stability in a 1 M KOH solution. By employing operando X-ray absorption spectroscopy (XAS) and Raman spectroscopy, along with ex situ TEM and XPS characterization, we determine the specific self-reconstruction path (MS2 was directly converted into MOOH) and real active species. This research offers great opportunities for the development of highly efficient catalysts.

Graphical abstract: Structural reconfiguration of an Ru-bearing high-entropy sulfide into an efficient alkaline oxygen evolution catalyst

Supplementary files

Article information

Article type
Communication
Submitted
26 Feb 2025
Accepted
12 Apr 2025
First published
14 Apr 2025

Chem. Commun., 2025, Advance Article

Structural reconfiguration of an Ru-bearing high-entropy sulfide into an efficient alkaline oxygen evolution catalyst

W. Peng, Z. Lv, W. Cheng, J. Li, S. Zhao, B. Yan, L. Shang, J. Zhou, T. Zhang and H. Gou, Chem. Commun., 2025, Advance Article , DOI: 10.1039/D5CC00974J

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