MOF-templated synthesis of Co4S3-Co9S8 heterojunctions embedded in N-doped carbon for enhanced hydrogen evolution

IF 1.3 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science Pub Date : 2025-07-08 DOI:10.1016/j.ijoes.2025.101127

Xiaokai Zhao , Yaqi Bi , Mozhou Li , Peipei Cui , Zhaodi Huang

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引用次数: 0

Abstract

In this study, a novel Co₄S₃-Co₉S₈ heterostructure embedded in N-doped carbon (Co₄S₃-Co₉S₈@NC) was successfully synthesized through thiourea-assisted sulfurization of a Co-MOF template. The obtained Co₄S₃-Co₉S₈ heterojunction material gets benefits from the synergistic effects of heteroatom-doped carbon matrix and well-defined heterostructure with many active sites. As result, the heterojunction material show enhanced hydrogen evolution reaction (HER) performance in comparison with single-component counterparts. In 1.0 M KOH, it shows enhanced HER performance of requiring only 190 mV overpotential to reach 10 mA·cm⁻², which is superior to most reported Co-based catalysts. In addition, it not only showed an almost unchanged LSV curve compared to the initial value before 2000 CV cycle, but also maintained a current density of 99.8 % during the 10 h continuous i-t test. This work provides a facile strategy for constructing high-performance Co-based heterostructured electrocatalysts for HER.

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mof模板法合成嵌入n掺杂碳的Co4S3-Co9S8异质结以促进析氢

在本研究中，通过硫脲辅助硫化Co-MOF模板，成功合成了一种新型嵌入n掺杂碳（Co4S3-Co9S8@NC）的Co4S3-Co9S8异质结构。得到的Co4S3-Co9S8异质结材料得益于杂原子掺杂碳基体的协同效应和具有许多活性位点的明确异质结构。结果表明，与单组分材料相比，异质结材料表现出更强的析氢反应性能。在1.0 M KOH条件下，其HER性能得到了提高，只需要190 mV过电位就能达到10 mA·cm−2，优于大多数报道的co基催化剂。此外，在2000 CV循环之前，它的LSV曲线与初始值相比几乎没有变化，并且在10 h的连续i-t测试中，它的电流密度保持在99.8 %。这项工作为构建高性能co基异质结构HER电催化剂提供了一种简便的策略。

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来源期刊

International Journal of Electrochemical Science 工程技术-电化学

CiteScore

3.00

自引率

20.00%

发文量

714

审稿时长

2.6 months

期刊介绍： International Journal of Electrochemical Science is a peer-reviewed, open access journal that publishes original research articles, short communications as well as review articles in all areas of electrochemistry: Scope - Theoretical and Computational Electrochemistry - Processes on Electrodes - Electroanalytical Chemistry and Sensor Science - Corrosion - Electrochemical Energy Conversion and Storage - Electrochemical Engineering - Coatings - Electrochemical Synthesis - Bioelectrochemistry - Molecular Electrochemistry