Lee Minjeong, Jang Yeongeun, Yoon Gayoung, Lee Seonghwa, Ryu Gyeong Hee
Department of Materials Engineering and Convergence Technology, Gyeongsang National University Jinju 52828 Republic of Korea
Department of Chemical Engineering, Changwon National University 51140 Changwon Republic of Korea
RSC Adv. 2024 Mar 27;14(15):10172-10181. doi: 10.1039/d4ra01120a. eCollection 2024 Mar 26.
Transition metal hydroxides are commonly used to develop nanostructures with desired functionalities by controlling their size, morphology, and structure. In this study, nickel hydroxide nanosheets with a hexagonal island shape are synthesized a surfactant-assisted method. Using this method, nickel hydroxide nanosheets can be easily achieved in a quick manner. The synthesized nanosheets are 3-6 nm thick and exhibit a curly and wrinkled morphology with increasing surfactant concentration. These nanosheets demonstrate superior catalytic properties for the oxygen evolution reaction activity compared to nickel oxide sheets obtained a simple heat treatment. Furthermore, we conduct surface enhanced Raman scattering analysis to confirm that the nickel hydroxide nanosheets serve as active species for NiOOH during the oxygen evolution reaction, and we propose an electrochemical mechanism for this system. This study not only presents the detailed synthesis process but also proposes a straightforward approach, offering valuable insights into the structural and electrochemical properties of the resulting nanosheets.
过渡金属氢氧化物通常用于通过控制其尺寸、形态和结构来开发具有所需功能的纳米结构。在本研究中，采用表面活性剂辅助法合成了具有六边形岛状的氢氧化镍纳米片。使用这种方法，可以快速轻松地获得氢氧化镍纳米片。合成的纳米片厚度为3-6纳米，随着表面活性剂浓度的增加，呈现出卷曲和褶皱的形态。与通过简单热处理获得的氧化镍片相比，这些纳米片对析氧反应活性表现出优异的催化性能。此外，我们进行了表面增强拉曼散射分析，以确认氢氧化镍纳米片在析氧反应过程中作为NiOOH的活性物种，并提出了该系统的电化学机制。本研究不仅展示了详细的合成过程，还提出了一种直接的方法，为所得纳米片的结构和电化学性质提供了有价值的见解。
