Anion Shielding in Nb‐WO <sub>3</sub> /WS <sub>2</sub> Heterostructures: A Strategy for Efficient and Corrosion‐Resistant Seawater Electrolysis

Seawater electrolysis is a promising route for sustainable hydrogen production, but chloride-induced corrosion severely limits its practicality. Here, a dual-modulated Nb-WO<sub>3</sub>/WS<sub>2</sub> heterostructure electrocatalyst that simultaneously enhances oxygen evolution reaction (OER) kinetics and resists chloride corrosion is designed. The Nb-WO<sub>3</sub>/WS<sub>2</sub> anode achieves remarkably low overpotentials of 212 and 369 mV at 10 and 100 mA cm<sup>-2</sup>, respectively, in alkaline simulated seawater, with a Tafel slope of 35.58 mV dec<sup>-1</sup>. The catalyst also exhibits remarkable stability, maintaining performance over 1000 CV cycles. Mechanistic studies reveal that Nb doping introduces oxygen vacancies and modulates the electronic structure, while the in situ formation of a WO<sub>x</sub> protective layer during OER effectively repels Cl<sup>-</sup> via anion shielding. This work provides a strategic approach to developing durable, efficient, and non-precious-metal-based catalysts for seawater splitting.

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Publication Details

Journal
Small
Published
2025-11-12
DOI
https://doi.org/10.1002/smll.202509761
Citations
4
Primary Topic
Electrocatalysts for Energy Conversion
Type
article
Field-Weighted Citation Impact
1.45

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article

Anion Shielding in Nb‐WO 3 /WS 2 Heterostructures: A Strategy for Efficient and Corrosion‐Resistant Seawater Electrolysis

Zhiyu Jia, Jinfa Chang, Meiling Xiao, Zihao Xing et al.
4 citations
Small
Electrocatalysts for Energy Conversion
1.45
article

Anion Shielding in Nb‐WO 3 /WS 2 Heterostructures: A Strategy for Efficient and Corrosion‐Resistant Seawater Electrolysis

Zhiyu Jia, Jinfa Chang, Meiling Xiao, Zihao Xing, Lin Yang, Yijun Chen, Wei Liu, Min Yang, Xinran Sun, Kaichi Qin, Qianyu Li
article en
4 citations

Abstract

Seawater electrolysis is a promising route for sustainable hydrogen production, but chloride-induced corrosion severely limits its practicality. Here, a dual-modulated Nb-WO<sub>3</sub>/WS<sub>2</sub> heterostructure electrocatalyst that simultaneously enhances oxygen evolution reaction (OER) kinetics and resists chloride corrosion is designed. The Nb-WO<sub>3</sub>/WS<sub>2</sub> anode achieves remarkably low overpotentials of 212 and 369 mV at 10 and 100 mA cm<sup>-2</sup>, respectively, in alkaline simulated seawater, with a Tafel slope of 35.58 mV dec<sup>-1</sup>. The catalyst also exhibits remarkable stability, maintaining performance over 1000 CV cycles. Mechanistic studies reveal that Nb doping introduces oxygen vacancies and modulates the electronic structure, while the in situ formation of a WO<sub>x</sub> protective layer during OER effectively repels Cl<sup>-</sup> via anion shielding. This work provides a strategic approach to developing durable, efficient, and non-precious-metal-based catalysts for seawater splitting.

SmallVol. 21(51)
Beijing Institute of Technology (CN), University of Science and Technology of China (CN), Northeast Normal University (CN), Fuel Cells and Hydrogen (BE), Changchun Institute of Applied Chemistry (CN), University of Hong Kong (HK)
National Natural Science Foundation of China, People's Government of Jilin Province, Fundamental Research Funds for the Central Universities
Openalex Percentile: Top 17%
Electrocatalysts for Energy Conversion
1.45
DOIOpen Access PDFOpenAlex
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