Synergistic interface regulation of CoS2/CoP heterostructures supported on coal-based carbon fibers toward high-performance overall water splitting

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-09-29 DOI:10.1016/j.ijhydene.2025.151699

Ningning Liu , Tingting Huang , Xiaoyan Liu , Zhiwei Yu , Guancheng Xu , Li Zhang

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Abstract

Transition metal phosphides (TMPs) and sulfides (TMSs) are regarded as promising non-noble electrocatalysts, yet their single-component nature restricts further enhancement of active sites, charge transfer, and durability. To address this issue, we fabricated a sulfide-phosphide heterostructured material supported on coal-based carbon nanofibers (C-CNFs) (denoted as CoS₂/CoP@C-CNFs) via electrodeposition, followed by a one-step vapor-phase sulfidation-phosphidation process. The heterojunction interface facilitates electron transfer and promotes the in-situ generation of active CoOOH during the Oxygen Evolution Reaction (OER), as confirmed by in-situ Raman. The catalyst demonstrates excellent Hydrogen Evolution Reaction (HER) and OER performance with overpotentials of 67 mV and 210 mV, respectively, at 10 mA cm⁻². As both anode and cathode in an alkaline electrolyzer, it requires only 1.549 V for overall water splitting at 10 mA cm⁻² and exhibits remarkable stability over 112 h. This work presents a general synthetic strategy for highly efficient and stable bifunctional electrocatalysts.

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煤基碳纤维支撑的CoS2/CoP异质结构对高性能整体劈水的协同界面调控

过渡金属磷化物（TMPs）和硫化物（tms）被认为是很有前途的非贵金属电催化剂，但它们的单组分性质限制了活性位点的进一步增强、电荷转移和耐久性。为了解决这一问题，我们通过电沉积制备了一种基于煤基碳纳米纤维（C-CNFs）（标记为CoS2/CoP@C-CNFs）的硫化物-磷化异质结构材料，然后采用一步气相硫化-磷化工艺。原位拉曼实验证实，异质结界面促进了析氧反应（OER）中电子的转移，促进了活性CoOOH的原位生成。该催化剂在10 mA cm−2下的过电位分别为67 mV和210 mV，具有优异的析氢反应（HER）和OER性能。作为碱性电解槽的阳极和阴极，它只需要1.549 V就能在10 mA cm - 2下进行总水分解，并且在112小时内表现出显著的稳定性。本工作提出了高效稳定的双功能电催化剂的一般合成策略。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.