Nickel sulfide nanowire-filled carbon nanotubes as electrocatalysts for efficient hydrogen evolution reaction
Nickel sulfide nanowire-filled carbon nanotubes as electrocatalysts for efficient hydrogen evolution reaction
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DOI：
10.1016/j.ijhydene.2023.10.171
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发表时间：
2023-12-14
影响因子：
7.2
通讯作者：
Li，Wenzhi
中科院分区：
文献类型：
--
作者：
Gotame，Ram Chandra;Poudel，Yuba Raj;Li，Wenzhi
开发一种由非贵金属材料制成的用于析氢反应（HER）的具有成本效益、高效且环保的电催化剂具有挑战性。该研究论文提出了在碳布（CC）上合成的硫化镍（Ni3S2）纳米线填充的多壁碳纳米管（CNT）（Ni3S2@CNTs/CC）作为高效HER电催化剂的应用。检查了 Ni3S2@CNTs/CC 作为工作电极的析氢能力。在 1.0 M KOH 溶液中，Ni3S2@CNTs/CC 需要 381 mV 和 549 mV 的阴极过电位，才能分别产生 10 mA/cm2 和 100 mA/cm2 的电流密度。电化学阻抗测量显示 Ni3S2@CNTs/CC 的电荷转移电阻值为 3.3 Ω。电化学活性表面积的评估表明，Ni3S2@CNTs/CC 比原始 CC 具有更多的电化学活性位点和更高的粗糙度因子。最重要的是，经过 3000 次 CV 循环和 12 小时恒定 HER 后，Ni3S2@CNTs/CC 的电流密度没有显着降低。这些发现表明，Ni3S2@CNTs/CC 是一种经济高效、功能强大且稳定的强碱性介质中 HER 电极材料。
Developing a cost-effective, efficient, and eco-friendly electrocatalyst made from non-noble materials for the hydrogen evolution reaction (HER) is challenging. This research paper presents an application of the nickel sulfide (Ni3S2) nanowires-filled multiwalled carbon nanotubes (CNTs) synthesized on carbon cloth (CC) (Ni3S2@CNTs/CC) as an efficient HER electrocatalyst. The performance of Ni3S2@CNTs/CC as a working electrode was examined for its hydrogen evolution ability. In a 1.0 M KOH solution, Ni3S2@CNTs/CC requires cathodic overpotentials of 381 mV and 549 mV to generate current densities of 10 mA/cm2and 100 mA/cm2, respectively. Electrochemical impedance measurements showed a low charge transfer resistance value of 3.3 Ω for Ni3S2@CNTs/CC.The evaluation of the electrochemically active surface area revealed that Ni3S2@CNTs/CC has more electrochemical active sites and a higher roughness factor than pristine CC. Most importantly, the current density of Ni3S2@CNTs/CC did not significantly degrade after 3000 CV cycles and 12 h of constant HER. These findings suggest that Ni3S2@CNTs/CC is a cost-effective, highly functional, and stable electrode material for HER in a strongly alkaline medium.