Wei Yunping, Li Runze, Lin Meng
Center for Experimental Chemistry Education of Shandong University, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
Sensors (Basel). 2024 Dec 29;25(1):135. doi: 10.3390/s25010135.
In this study, a simple and easy synthesis strategy to realize the modification of AuHgPt nanoalloy materials on the surface of ITO glass at room temperature is presented. Gold nanoparticles as templates were obtained by electrochemical deposition, mercury was introduced as an intermediate to form an amalgam, and then a galvanic replacement reaction was utilized to successfully prepare gold-mercury-platinum (AuHgPt) nanoalloys. The obtained alloys were characterized by scanning electron microscopy, UV-Vis spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction techniques. The electrochemical sensing performance of the AuHgPt-modified electrode for hydrogen peroxide was evaluated by cyclic voltammetry and chronoamperometry. Under light conditions, the AuHgPt-modified electrode exhibited a desirable current response in the detection of hydrogen peroxide due to the synergistic effect of the localized surface plasmon resonance effect inherent in gold nanoparticles, and this synergistic effect improved the sensitivity of hydrogen peroxide detection. Meanwhile, the AuHgPt-modified electrode also exhibited better stability and reproducibility, which makes the modified electrode have great potential for various applications in the field of electrochemical sensing.
在本研究中，提出了一种简单易行的合成策略，可在室温下实现氧化铟锡（ITO）玻璃表面金汞铂纳米合金材料的改性。通过电化学沉积获得金纳米颗粒作为模板，引入汞作为中间体形成汞齐，然后利用置换反应成功制备了金汞铂（AuHgPt）纳米合金。通过扫描电子显微镜、紫外可见光谱、X射线光电子能谱和X射线衍射技术对所得合金进行了表征。采用循环伏安法和计时电流法评估了AuHgPt修饰电极对过氧化氢的电化学传感性能。在光照条件下，由于金纳米颗粒固有的局域表面等离子体共振效应的协同作用，AuHgPt修饰电极在检测过氧化氢时表现出理想的电流响应，这种协同效应提高了过氧化氢检测的灵敏度。同时，AuHgPt修饰电极还表现出更好的稳定性和重现性，这使得修饰电极在电化学传感领域的各种应用中具有巨大潜力。
