Activating lattice oxygen by sulfate anchoring via Fe3+ etching towards highly efficient and stable water/seawater oxidation

Jianmin Wang, Hongyu Zhao, Hao Zhang, Ruoyu Huang, Shanshan Zheng, Haijin Li, Jiajia Cai, Yongtao Li, Xiaofang Liu and Xiaolong Deng

Renewable Energy, 2025, vol. 242, issue C

Abstract: Electrochemical oxygen evolution reaction (OER) plays a critical role in many sustainable energy conversion processes. Nevertheless, the intrinsically sluggish kinetics limited by the multistep proton-coupled electron transfer processes of the OER have dramatically restricted the energy conversion efficiency. Conventionally, the lattice-oxygen-mediated mechanism (LOM) exhibits a lower thermodynamic barrier than that of the absorbate evolution mechanism (AEM). However, the promoted intrinsic activity is compromised by low stability due to the migration of lattice oxygen during OER. Herein, a rapid Fe3+ etching method was employed to construct NiFeOOH-SO4/Ni3S2/NF catalytic materials with a large amount of anchored SO42−. Systematic experiments and characterizations demonstrate that the in-situ generated SO42− not only facilitates the kinetics of the electrode via activating lattice oxygen, leading to improved intrinsic OER activity and durability in alkaline seawater. The as-obtained NiFeOOH-SO4/Ni3S2/NF exhibited excellent OER performance with a low overpotential of only 206 mV at 10 mA cm−2 and provided stable catalytic performance for 200 h at 100 mA cm−2. This work may provide new insight into elucidating the OER activity enhancement mechanism and improvement stability by the oxyanion groups in alkaline seawater.

Keywords: Oxygen evolution reaction; Seawater splitting; Lattice oxygen mechanical; Fe3+ etching; Sulfate anchoring (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148125000473
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:242:y:2025:i:c:s0960148125000473

DOI: 10.1016/j.renene.2025.122385

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().