The pursuit of efficient and sustainable hydrogen production through water splitting has led to intensive research in the field of electrocatalysis. However, the impediment posed by sluggish reaction kinetics has served as a significant barrier. This challenge has inspired the development of electrocatalysts characterized by high activity, abundance in earth's resources, and long-term stability. In addressing this obstacle, it is imperative to meticulously fine-tune the structure, morphology, and electronic state of electrocatalysts. By systematically manipulating these key parameters, the full potential of electrocatalysts can unleash, enhancing their catalytic activity and overall performance. Hence in this study, a novel heterostructure is designed, showcasing core–shell architectures achieved by covering WN-WC nanowire arrays with tri-metallic Nickel-Cobalt-Iron layered triple hydroxide nanosheets on carbon felt support (NiCoFe-LTH/WN-WC/CF). By integrating the different virtue such as binder free electrode design, synergistic effect between different components, core–shell structural advantages, high exposed active sites, high electrical conductivity and heterostructure design, NiCoFe-LTH/WN-WC/CF demonstrates striking catalytic performances under alkaline conditions. The substantiation of all the mentioned advantages has been validated through electrochemical data in this study. According to these results NiCoFe-LTH/WN-WC/CF achieves a current density of 10 mA cm needs overpotential values of 101 mV for HER and 206 mV for OER, respectively. Moreover, as a bi-functional electrocatalyst for overall water splitting, a two-electrode device needs a voltage of 1.543 V and 1.569 V to reach a current density of 10 mA cm for alkaline water and alkaline seawater electrolysis, respectively. Briefly, this research with attempting to combination of different factors try to present a promising stride towards advancing bi-functional catalytic activity with tailored architectures for practical green hydrogen production via electrochemical water splitting process.

中文翻译：

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设计基于 W2N-WC 纳米线上的雪花 NiCoFe-LTH 的核壳异质结构阵列，作为先进的双功能电催化剂，用于促进碱性水/海水电解

通过水分解实现高效和可持续的氢气生产的追求导致了电催化领域的深入研究。然而，缓慢的反应动力学造成的障碍已成为一个重大障碍。这一挑战激发了人们开发具有高活性、地球资源丰富和长期稳定性特点的电催化剂。为了解决这一障碍，必须仔细调整电催化剂的结构、形态和电子状态。通过系统地控制这些关键参数，可以释放电催化剂的全部潜力，提高其催化活性和整体性能。因此，在本研究中，设计了一种新颖的异质结构，展示了通过在碳毡支撑上用三金属镍钴铁层状三氢氧化物纳米片覆盖WN-WC纳米线阵列（NiCoFe-LTH/WN-WC/ CF）。通过整合无粘合剂电极设计、不同组分之间的协同效应、核壳结构优势、高活性位点暴露、高电导率和异质结构设计等不同优点，NiCoFe-LTH/WN-WC/CF在以下条件下表现出惊人的催化性能：碱性条件。本研究中的电化学数据已经验证了所有提到的优点。根据这些结果，NiCoFe-LTH/WN-WC/CF 实现 10 mA cm 的电流密度，需要 HER 过电位值分别为 101 mV，OER 过电位值分别为 206 mV。此外，作为一种全水分解的双功能电催化剂，双电极装置需要1.543 V和1.569 V的电压才能分别达到10 mA cm的电流密度，用于电解碱性水和碱性海水。简而言之，这项研究试图结合不同的因素，试图通过电化学水分解过程的实际绿色氢生产的定制架构，在推进双功能催化活性方面迈出有希望的一步。