Construction of Fe doped Co4S3/Ni3S2 composite for efficient alkaline freshwater and seawater oxidation

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL Journal of Electroanalytical Chemistry Pub Date : 2025-03-28 DOI:10.1016/j.jelechem.2025.119098

Shuangyan Lin , Haoran Gao , Tianle Li , Zhikun Xu

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Abstract

One of the most important and fundamental challenges for the production of hydrogen through seawater electrolysis is constructing strong and high-activity oxygen evolution reaction (OER) catalysts. In this paper, Fe-doped Co₄S₃/Ni₃S₂ (Fe-Co₄S₃/Ni₃S₂) composite was prepared by a one-step hydrothermal method. The doped Fe in Co₄S₃/Ni₃S₂ composite modifies the electronic structure and promotes electron transfer, leading to improved OER performance in alkaline freshwater and seawater. At 100 mA/cm⁻², Fe-Co₄S₃/Ni₃S₂ exhibits low overpotentials of 329 and 361 mV in alkaline freshwater and seawater, respectively. In particular, the overpotential in alkaline freshwater is reduced by 85 mV compared to the Co₄S₃/Ni₃S₂, and 112 and 145 mV compared to single-phase Co₄S₃ and Ni₃S₂. Additionally, the Fe-Co₄S₃/Ni₃S₂ can operate steadily at 100 mA cm⁻² for at least 100 h in alkaline seawater. The current study provides a facile method for preparation of efficient OER catalysts of sulfides by Fe doping in composite.

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铁掺杂Co4S3/Ni3S2高效碱性淡水和海水氧化复合材料的构建

海水电解制氢最重要和最根本的挑战之一是构建强效、高活性的析氧反应催化剂。本文采用一步水热法制备了fe掺杂Co4S3/Ni3S2 （Fe-Co4S3/Ni3S2）复合材料。Co4S3/Ni3S2复合材料中Fe的掺杂改变了电子结构，促进了电子转移，提高了在碱性淡水和海水中的OER性能。在100 mA/cm−2时，Fe-Co4S3/Ni3S2在碱性淡水和海水中表现出低过电位，分别为329和361 mV。与Co4S3/Ni3S2相比，碱性淡水中的过电位降低了85 mV，与单相Co4S3和Ni3S2相比，过电位降低了112 mV和145 mV。此外，Fe-Co4S3/Ni3S2在碱性海水中可以在100 mA cm−2下稳定工作至少100小时。本研究为在复合材料中掺杂铁制备高效硫化物OER催化剂提供了一种简便的方法。

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.