The wetting properties of an electrode surface are of significant importance to the performance of electrochemical devices because electron transfer occurs at the electrode/electrolyte interface. Described in this paper is a low-cost metal oxide electrocatalyst (CuO)-based high-performance sensing device using an enzyme electrode with a solid/liquid/air triphase interface in which the oxygen level is constant and sufficiently high. We apply the sensing device to detect glucose, a model test analyte, and demonstrate a linear dynamic range up to 50 mM, which is about 25 times higher than that obtained using a traditional enzyme electrode with a solid/liquid diphase interface. Moreover, we show that sensing devices based on a triphase assaying interface are insensitive to the significant oxygen level fluctuation in the analyte solution.

中文翻译：

---

高性能金属氧化物传感设备，使用带有固/液/空三相界面的电极

电极表面的润湿性质对于电化学装置的性能非常重要，因为电子转移发生在电极/电解质界面处。本文介绍了一种低成本的基于金属氧化物电催化剂（CuO）的高性能传感设备，该设备使用具有固/液/气三相界面的酶电极，其中氧含量恒定且足够高。我们将传感设备应用于检测葡萄糖（一种模型测试分析物），并演示了高达50 mM的线性动态范围，这比使用具有固/液两相界面的传统酶电极所获得的线性动态范围高约25倍。此外，我们显示基于三相分析接口的传感设备对分析物溶液中的显着氧水平波动不敏感。