Glassy carbon electrode was modified with palladium‐decorated conducting poly(thionine) film to develop a simple, cost‐effective, and fast amperometric sensor for the detection of H2O2. Conducting PTH film served as a porous and stable support matrix for even distribution of the Pd nanomaterials. In order to get the maximum performance from the modified electrode system, experimental conditions were optimized using chronoamperometry. The Pd/PTH@GCE electrode showed maximum performance in buffer solution at pH = 7.5 meaning it is suitable for the detection of H2O2 at physiological pH (7.4). Scanning Electron Microscopy was performed for physical characterization of the modified electrodes using pencil graphite electrodes. The active surface area for Pd/PTH‐modified GCE was calculated as 1.103 cm2. The linear concentration range was determined as 0.2–7.0 mM and its sensitivity was determined as 40.0 μA mM−1. The detection limit (LOD) of the sensor was calculated as 12.3 μM with a signal/noise ratio of 3.

中文翻译：

---

基于钯修饰聚硫堇修饰玻碳电极的非酶过氧化氢传感器

用钯装饰的导电聚硫堇薄膜对玻碳电极进行修饰，开发出一种简单、经济高效、快速的电流传感器，用于检测 H2氧2。导电 PTH 薄膜作为多孔且稳定的支撑基质，使 Pd 纳米材料均匀分布。为了从改进的电极系统中获得最大性能，使用计时电流分析法优化实验条件。 Pd/PTH@GCE 电极在 pH = 7.5 的缓冲溶液中表现出最大性能，这意味着它适合检测 H2氧2在生理pH值（7.4）下。使用铅笔石墨电极进行扫描电子显微镜以对修饰电极进行物理表征。 Pd/PTH 修饰的 GCE 的活性表面积计算为 1.103 cm2。线性浓度范围确定为0.2–7.0 mM，其灵敏度确定为40.0 μA mM−1。计算得出传感器的检测限 (LOD) 为 12.3 μM，信噪比为 3。