This paper reports the pH sensing capability of a ruthenium oxide (RuO₂) and iridium oxide (IrO₂) coated titanium (ROIOT) electrode. The characterization results indicated that the ROIOT electrode had a cracked morphology. The RuO₂ and IrO₂ particles were decorated on the surface of the electrode. The ROIOT electrode showed near-Nernstian sensitivity of −50.8 mV pH⁻¹, with a wide detection range of pH 2–12. The response time was 4.0–13.5 s, which was fast and very sensitive to the pH change. The ROIOT electrode also demonstrated great detection reversibility and stability in various pH conditions. In the long-term experiment of 30 d, potential measurements using the ROIOT electrode had a minor fluctuation of 1.5 mV d⁻¹. The practical application of the ROIOT electrode was demonstrated by measuring the pH values of various buffer solutions and complex samples. With the advantages of low cost and simple production, it is believed that the ROIOT electrode could be a promising candidate for use as a sensing material for pH sensor development.

中文翻译：

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用于 pH 测量的氧化钌和氧化铱涂层钛电极

本文报道了氧化钌 (RuO ₂ ) 和氧化铱 (IrO ₂ ) 涂层钛 (ROIOT) 电极的 pH 传感能力。表征结果表明ROIOT电极具有破裂的形态。RuO ₂和IrO ₂颗粒装饰在电极表面。ROIOT 电极显示出 -50.8 mV pH ^{-1的近能斯特灵敏度}, 具有广泛的 pH 2–12 检测范围。响应时间为 4.0-13.5 s，响应速度快，对 pH 变化非常敏感。ROIOT 电极还在各种 pH 条件下表现出出色的检测可逆性和稳定性。在30 d的长期实验中，使用ROIOT电极的电位测量有1.5 mV d ^-1的微小波动。通过测量各种缓冲溶液和复杂样品的 pH 值，展示了 ROIOT 电极的实际应用。ROIOT电极具有成本低、生产简单等优点，有望成为开发pH传感器的传感材料。