Superhydrophilic S-NiFe LDH by Room Temperature Synthesis for Enhanced Alkaline Water/Seawater Oxidation at Large Current Densities

被引：4

作者：

Chen, Yangyang ^{[1
]}

Dong, Leilei ^{[1
]}

Jia, Shaobo ^{[1
]}

Zhang, Qi ^{[1
]}

Liu, Liying ^{[1
]}

Liu, Zhe ^{[1
]}

Zhang, Zhen ^{[1
]}

Yue, Kefen ^{[1
]}

Cheng, Yongliang ^{[1
]}

Li, Dongsheng ^{[2
]}

Zhu, Zhonghua ^{[3
]}

Wang, Yaoyu ^{[1
]}

机构：

[1] Northwest Univ, Coll Chem & Mat Sci, Key Lab Synthet & Nat Funct Mol, Xian Key Lab Funct Supramol Struct & Mat, Xian 710127, Peoples R China

[2] China Three Gorges Univ, Coll Mat & Chem Engn, Key Lab Inorgan Nonmet Crystalline & Energy Conver, Yichang 443002, Peoples R China

[3] Univ Queensland, Sch Chem Engn, Brisbane 4072, Australia

来源：

SMALL | 2025年 / 21卷 / 09期

基金：

中国国家自然科学基金;

关键词：

ion-exchange; large current density; layered double hydroxide; oxygen evolution reaction; seawater electrolysis; OXYGEN;

D O I：

10.1002/smll.202409499

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Developing high-performance oxygen evolution reaction (OER) electrocatalysts that can operate stably at large current densities in seawater plays a crucial role in enabling large-scale hydrogen production, however, it remains a significant challenge. Herein, sulfur-doped NiFe layered double hydroxide nanosheet (S-NiFe LDH) grown on a 3D porous nickel foam skeleton is synthesized through electrochemical deposition and ion-exchange strategies at room temperature as high-performance, highly selective, and durable OER electrocatalyst for seawater electrolysis at large current density. The incorporation of S can enhance the conductivity, promote structural reconstruction to form highly active oxyhydroxides, as well as improve the anti-corrosion ability of chloride ions. Furthermore, due to its unique self-supporting structure and superhydrophilicity, which provide abundant active sites and promote efficient bubble release, the optimized electrocatalyst demands a minimal overpotential of 278 and 299 mV to generate 1000 mA cm-2 in alkaline freshwater/seawater, respectively, confirming its excellent OER activity. Meanwhile, the synthesized electrocatalyst also demonstrates exceptional stability in both media, as it maintains stable performance for a duration of 200 h at 500 mA cm-2. The present work offers an efficient strategy and innovative viewpoint for developing efficient OER electrocatalysts for seawater electrolysis.

引用

页数：11

共 57 条

[1] Boosting the electrocatalytic activity of NiSe by introducing MnCo as an efficient heterostructured electrocatalyst for large-current-density alkaline seawater splitting [J].