溶解氧传感器金电极的制备及氧还原性能研究
Preparation and Oxygen Reduction Performance Study of Gold Electrodes for Dissolved Oxygen Sensors
张健 1唐团团 1白雪宁 1张琪文 1杨文静 1黎学明1
作者信息
- 1. 重庆大学化学化工学院，重庆 401331
- 折叠
摘要
针对极谱型溶解氧传感器中金电极成本高、对氧还原反应（ORR）动力学缓慢的问题，论文分别通过恒电流沉积和恒电流脉冲沉积两种方法，在预镀镍的铍青铜基底上制备金电极。利用扫描电子显微镜（SEM）、X射线能谱（EDS）和X射线衍射（XRD）表征了金电极的形貌与结构，并使用旋转圆盘电极（RDE）通过循环伏安法（CV）、线性扫描伏安法（LSV）在1 M KOH和KCl混合溶液中评估其对ORR的催化活性。结果表明，两种方法均成功制备出具有ORR活性的金电极，其中恒电流脉冲沉积制备的金电极表面颗粒大小较为均匀，晶粒尺寸更小，其起始电位（0.894 V）和半波电位（0.831 V）均比恒电流沉积制备的金电极（0.882 V和0.806 V）更正，Tafel斜率更低（43.04 mV/dec），电子转移数为2.4。表明恒电流脉冲沉积是制备高性能溶解氧传感器金电极的更优方法。
Abstract
To address the high cost and sluggish oxygen reduction reaction (ORR) kinetics of gold electrodes in polarographic dissolved oxygen sensors, gold electrodes were prepared by galvanostatic deposition and galvanostatic pulse deposition. Gold layers were deposited on nickel-preplated beryllium bronze substrates. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) characterized the morphology and crystal structure of the electrodes. A rotating disk electrode (RDE) with cyclic voltammetry (CV) and linear sweep voltammetry (LSV) evaluated their ORR catalytic activity in a mixed solution of 1 M KOH and KCl. Both methods successfully produced gold electrodes with ORR activity. The electrode from galvanostatic pulse deposition had more uniform particle size and smaller crystallite size. Its onset potential (0.894 V) and half-wave potential (0.831 V) were more positive than those from galvanostatic deposition (0.882 V and 0.806 V). It also showed a lower Tafel slope (43.04 mV/dec) and an electron transfer number of 2.4. Galvanostatic pulse deposition is thus a better method for preparing high-performance gold electrodes for dissolved oxygen sensors.关键词
溶解氧传感器/金电极/电沉积/氧还原反应Key words
dissolved oxygen sensor/gold electrode/electrodeposition/oxygen reduction reaction引用本文复制引用
张健,唐团团,白雪宁,张琪文,杨文静,黎学明.溶解氧传感器金电极的制备及氧还原性能研究[EB/OL].(2026-05-08)[2026-05-10].http://www.paper.edu.cn/releasepaper/content/202605-4.学科分类
电化学工业
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