Iridium-free high-entropy ruthenium-based oxides with activated lattice oxygen towards high efficient and durable acidic water oxidation

Abstract

Ruthenium-based oxides are promising high-activity acidic OER catalysts to replace IrO2 but suffer from poor stability. Here, we report an Ir-free high-entropy (RuCrMnFeNi)O2 electrocatalyst with exceptional activity (212 mV@10 mA cm−2) and stability (100 h) in 0.5 M H2SO4. In PEM electrolyzers, it operates stably for 300 h at 200 mA cm−2. 18O labeling confirms a lattice-oxygen-mediated mechanism.

Graphical abstract: Iridium-free high-entropy ruthenium-based oxides with activated lattice oxygen towards high efficient and durable acidic water oxidation

Supplementary files

Article information

Article type
Communication
Submitted
26 May 2025
Accepted
19 Jun 2025
First published
20 Jun 2025

Chem. Commun., 2025, Advance Article

Iridium-free high-entropy ruthenium-based oxides with activated lattice oxygen towards high efficient and durable acidic water oxidation

S. Yu, L. Li, C. Ma, X. Zhang, M. Li, A. Wang, L. Liang and H. Liu, Chem. Commun., 2025, Advance Article , DOI: 10.1039/D5CC02962G

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