In-situ construction of vertically Fe doped CoMoP nanosheet honeycomb as bifunctional electrocatalysts for efficient overall water splitting

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science Pub Date : 2024-12-09 DOI:10.1016/j.jcis.2024.12.045

Bingxin Zhao , Wenyue Jiang , Ziting Li , Peng Zhou , Xiaoshuang Chen , Jinping Wang , Rui Yang , Chunling Zuo

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Abstract

The bifunctional electrocatalysts for hydrogen and oxygen evolution reactions (HER and OER) are crucial pivot in water electrolysis territory. In this study, vertically Fe incorporated CoMoP (Fe-CoMoP) nanosheet honeycomb product with super-hydrophilic and aerophobic features was projected and generated through the straightforward hydrothermal technique and phosphatized process. The Fe-CoMoP catalyst exhibits more distinguished intrinsic activity, accessible active sites, effective charge transfer and weak adhesion of gas bubbles. The overpotentials of dual-function Fe-CoMoP are 87.1 mV for HER and 244.4 mV for OER to drive the current density of 10 mA cm⁻². At room temperature, the overall water splitting reaction of Fe-CoMoP as cathode and anode is carried out at 1.54 V to reach 10 mA cm⁻² with good stability. Simultaneously, the Fe-CoMoP couple electrolyzer also presents remarkable water splitting activity and durability in simulated industry circumstances of 6 M KOH, 60 °C at 500 mA cm⁻², which are close to practical conditions.

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原位构建垂直掺铁CoMoP纳米片蜂窝双功能电催化剂用于高效整体水分解。

氢析氧反应的双功能电催化剂（HER和OER）是水电解领域的重要支点。本研究通过直接水热法和磷化工艺，对具有超亲水性和疏气特性的垂直含铁CoMoP （Fe-CoMoP）纳米片蜂窝产品进行了投影和制备。Fe-CoMoP催化剂表现出更明显的本征活性、可接近的活性位点、有效的电荷转移和较弱的气泡粘附。双功能Fe-CoMoP驱动电流密度为10 mA cm-2时，HER过电位为87.1 mV， OER过电位为244.4 mV。在室温下，Fe-CoMoP作为正极和负极在1.54 V下进行整体水分解反应，达到10 mA cm-2，稳定性良好。同时，Fe-CoMoP偶极电解槽在6 M KOH， 60°C， 500 mA cm-2的模拟工业环境下也表现出良好的水分解活性和耐久性，接近实际条件。

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来源期刊

Journal of Colloid and Interface Science 化学-物理化学

CiteScore

16.10

自引率

7.10%

发文量

2568

审稿时长

2 months

期刊介绍： The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality. Emphasis: The journal emphasizes fundamental scientific innovation within the following categories: A.Colloidal Materials and Nanomaterials B.Soft Colloidal and Self-Assembly Systems C.Adsorption, Catalysis, and Electrochemistry D.Interfacial Processes, Capillarity, and Wetting E.Biomaterials and Nanomedicine F.Energy Conversion and Storage, and Environmental Technologies

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产品信息

阿拉丁

Cobalt nitrate hexahydrate [Co(NO3)2·6H2O]

阿拉丁

Ferric nitrate nonahydrate

阿拉丁

Cobalt nitrate hexahydrate