Authors
Jiayuan Zhang, Kaixin Zhu, Xizhong Yan, Shengyu Wei, Shengliang Qi, Binglian Liang, Xuye Jiang, Ming Hu, Hefeng Zhang, Weiguang Ma, Xu Zong
Published in
Nanoscale. Oct 12, 2026. Epub Oct 12, 2026.
Abstract
The development of efficient and durable electrocatalysts for the oxygen evolution reaction (OER) remains a critical challenge for water splitting due to the sluggish reaction kinetics and limited catalyst durability. Herein, we report a facile two-step electrodeposition strategy to fabricate a sulfidation-modulated high-entropy Prussian blue analogue directly on carbon paper (HE-PBA-S/CP) as an efficient self-supported OER electrocatalyst. The high-entropy PBA serves as a compositionally complex multimetal precursor, while thiourea-assisted sulfidation modulates the surface/interface characteristics and electronic environments of the constituent metal centers, substantially increasing the electrochemically accessible interface and facilitating the formation of catalytically active multimetal oxyhydroxide species during the OER. As a result, the optimized HE-PBA-S/CP catalyst requires an overpotential of only 167 mV to deliver a current density of 10 mA cm-2 together with good stability for 120 h at 100 mA cm-2 in alkaline media, significantly outperforming the pristine HE-PBA/CP catalyst and its composition-controlled sulfidation-modulated PBA counterparts. This work highlights the integration of high-entropy precursor design and sulfidation-assisted surface/interface modulation as an effective strategy for the rational design of cost-effective and high-performance electrocatalysts for water splitting.
PMID:
42861762
Bibliographic data and abstract were imported from PubMed on 12 Oct 2026.
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