Synergistic coupling of NiCoS nanorods with NiCo-LDH nanosheets towards highly efficient hydrogen evolution reaction in alkaline media

IF 4.5 3区化学 Q1 Chemical Engineering Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 DOI:10.1016/j.jelechem.2023.117622

Guanyun Gao , Wensi Wang , Yanling Wang , Ziqi Fu , Lu Liu , Yunmei Du , Zhenjiang Li , Yanru Liu , Lei Wang

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引用次数: 2

Abstract

As the key step in the overall water splitting system, hydrogen evolution reaction (HER) has become one of the main methods of hydrogen production in industrial applications. Here, through the strong coupling between NiCo-LDH nanosheets and NiCoS nanorods, the three-dimensional heterogeneous structure formed by the composite can provide a large catalytic specific surface area. The modification of LDH lamellar will provide abundant edge active sites and enhance its structural stability. The synergistic effect of NiCo-LDH and NiCoS can optimize the electronic structure and promote mass transfer and water cracking. Benefiting from the above points, the NiCoS@NiCo-LDH/NF obtained showed the significant boost in HER process. It only required 99 mV to reach current density of 10 mA·cm⁻² and maintained excellent durability for 24 h for HER, which proved NiCoS@NiCo-LDH/NF was a cost-free, high-efficient and outstandingly stable HER catalyst in basic solution.

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NiCoS纳米棒与NiCo-LDH纳米片协同耦合在碱性介质中实现高效析氢反应

析氢反应作为整个水裂解系统的关键步骤，已成为工业应用中主要的制氢方法之一。在这里，通过NiCo-LDH纳米片和NiCoS纳米棒之间的强耦合，复合材料形成的三维非均相结构可以提供较大的催化比表面积。对LDH片层进行改性可以提供丰富的边缘活性位点，提高其结构稳定性。NiCo-LDH和NiCoS的协同作用可以优化电子结构，促进传质和水裂解。得益于以上几点，获得的NiCoS@NiCo-LDH/NF在HER过程中表现出显著的促进作用。在碱性溶液中，仅需99 mV即可达到10 mA·cm−2的电流密度，并保持24 h的优异耐久性，证明NiCoS@NiCo-LDH/NF是一种无成本、高效、稳定的HER催化剂。

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来源期刊

Journal of Electroanalytical Chemistry Chemical Engineering-General Chemical Engineering

CiteScore

7.50

自引率

6.70%

发文量

912

审稿时长

>12 weeks

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.