Time Tailoring NiFe2O4/Fe-NiS/Ni3S2 Heterocatalyst for Industrial-Scale Seawater Splitting

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-07-01 DOI:10.1021/acs.langmuir.5c01885

Zhanhua Su, Jing Liang, Zhifeng Zhao*, Rui Guo, Shiqi Zhang, Xiaofeng Li* and Shuangyan Lin*,

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引用次数: 0

Abstract

Water electrolysis is a promising approach for hydrogen production. However, achieving cost-effective and durable electrocatalysts at large current densities for seawater splitting remains a significant challenge. This study synthesized a NiFe₂O₄/Fe-NiS/Ni₃S₂ heterostructure on nickel foam (NF) via a simple solvothermal method with varying reaction times. The NiFe₂O₄/Fe-NiS/Ni₃S₂/NF-12h catalyst requires overpotentials of 398 mV for the hydrogen evolution reaction (HER) and 373 mV for the oxygen evolution reaction (OER) to achieve a current density of 1000 mA cm^–2 in an alkaline seawater medium. Notably, the NiFe₂O₄/Fe-NiS/Ni₃S₂/NF-12h (+,−) electrolyzer achieved a cell voltage of 1.92 V at 500 mA cm^–2 and exhibited remarkable stability, maintaining its performance for more than 100 h at 500 mA cm^–2 in an alkaline seawater electrolyte. These findings highlight the critical role of the reaction time in optimizing the morphologies of catalysts. Meanwhile, the synergistic effect of iron doping and interface interaction enhanced the electrocatalytic activity of NiFe₂O₄/Fe-NiS/Ni₃S₂. This work provides a practical strategy for designing high-performance electrocatalysts suitable for industrial-scale seawater electrolysis.

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工业规模海水裂解用NiFe2O4/Fe-NiS/Ni3S2异质催化剂

水电解是一种很有前途的制氢方法。然而，在大电流密度下实现经济、耐用的海水分解电催化剂仍然是一个重大挑战。采用简单的溶剂热法在泡沫镍（NF）上合成了NiFe2O4/Fe-NiS/Ni3S2异质结构。NiFe2O4/Fe-NiS/Ni3S2/NF-12h催化剂在碱性海水介质中，析氢反应（HER）和析氧反应（OER）的过电位分别为398 mV和373 mV，电流密度为1000 mA cm-2。值得注意的是，NiFe2O4/Fe-NiS/Ni3S2/NF-12h（+,-）电解槽在500 mA cm-2下的电池电压为1.92 V，并表现出出色的稳定性，在碱性海水电解质中在500 mA cm-2下可保持100小时以上的性能。这些发现强调了反应时间在优化催化剂形态中的关键作用。同时，铁掺杂和界面相互作用的协同作用增强了NiFe2O4/Fe-NiS/Ni3S2的电催化活性。本研究为设计适用于工业规模海水电解的高性能电催化剂提供了一种实用策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).