Domańska Aleksandra J, Skitał Piotr M
Doctoral School of the Rzeszow University of Technology, 35-959 Rzeszów, Poland.
Faculty of Chemistry, Rzeszow University of Technology, 35-959 Rzeszów, Poland.
Molecules. 2025 Apr 15;30(8):1771. doi: 10.3390/molecules30081771.
The galvanostatic electrodeposition of cobalt-nickel alloy coatings performed out on a 304 stainless steel substrate. The electrolyte baths contained metals salts, along with boric acid and sodium benzene sulfonate (SBS) as an organic additive in the deposition process. Structural and topographic analyses were performed using SEM-EDS and AFM techniques, respectively. The findings confirm the formation of nanostructured coatings. The images depicting various stages of coating formation indicated the inhibitory role of the organic additive. The presence of SBS enabled the formation of a coating composed of grains with diverse geometries and significantly reduced surface roughness. Hydrogen evolution was conducted in an alkaline environment (1 M NaOH). Overpotentials for the different structures were recorded at 10 mA/cm, yielding 196 mV and 225 mV for the coatings deposited with and without SBS, respectively. Additionally, experiments were performed in a laboratory-designed electrolyzer, which allowed for the measurement of gas volumes (H and O) generated under constant voltage and current conditions. The results demonstrated that the obtained coatings perform more effectively as hydrogen evolution cathodes than currently used materials, particularly under higher current densities. Electrolysis was conducted for 8 h, revealing improved stability of the coating deposited in the presence of SBS.
在304不锈钢基底上进行了钴镍合金涂层的恒电流电沉积。电解液中含有金属盐，以及硼酸和苯磺酸钠（SBS）作为沉积过程中的有机添加剂。分别使用扫描电子显微镜-能谱仪（SEM-EDS）和原子力显微镜（AFM）技术进行了结构和形貌分析。研究结果证实了纳米结构涂层的形成。描绘涂层形成各个阶段的图像表明了有机添加剂的抑制作用。SBS的存在使得能够形成由具有不同几何形状的晶粒组成的涂层，并显著降低了表面粗糙度。在碱性环境（1 M NaOH）中进行了析氢实验。在10 mA/cm²下记录了不同结构的过电位，对于添加和未添加SBS沉积的涂层，过电位分别为196 mV和225 mV。此外，在实验室设计的电解槽中进行了实验，该电解槽允许测量在恒定电压和电流条件下产生的气体体积（H₂和O₂）。结果表明，所获得的涂层作为析氢阴极比目前使用的材料表现更有效，特别是在更高的电流密度下。进行了8小时的电解，结果表明在SBS存在下沉积的涂层稳定性有所提高。
