Abstract Herein, an electrochemical ammonia sensor based on Ni foam-supported silver/polypyrrole and platinum nanoparticles electrode (Pt-Ag/PPy-NiF) was designed and constructed. The Ag/PPy layer was firstly grown on Ni foam surface via oxidation reduction reaction, and then Pt nanoparticles with great electrocatalytic activity were electrodeposited on the surface of Ag/PPy-NiF via cyclic voltammetry methodology. Electrochemical experiments demonstrated that the Pt-Ag/PPy-NiF electrode showed a great electrocatalytic ability of the oxidation of ammonia and an electrochemical aqueous ammonia sensor was proposed accordingly. The ammonia sensor showed a sensitivity of 0.089 mA μM−1, a detection limit of 37 nM (S/N = 3) and a wide linear range, as well as presenting a good anti-interference capability against many common ions in water. These excellent performances can be mainly attributed to large specific surface of electrode and great electrocatalytic ability of Pt nanoparticles.

中文翻译：

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用于氨水传感的镍泡沫负载铂纳米颗粒-银/聚吡咯电极的制备

摘要 在此，设计并构建了一种基于泡沫镍负载的银/聚吡咯和铂纳米颗粒电极（Pt-Ag/PPy-NiF）的电化学氨传感器。Ag/PPy层首先通过氧化还原反应在Ni泡沫表面生长，然后通过循环伏安法在Ag/PPy-NiF表面电沉积具有良好电催化活性的Pt纳米颗粒。电化学实验表明，Pt-Ag/PPy-NiF电极表现出很强的氨氧化电催化能力，因此提出了一种电化学氨水传感器。氨传感器的灵敏度为 0.089 mA μM-1，检测限为 37 nM (S/N = 3)，线性范围宽，并且对水中的许多常见离子具有良好的抗干扰能力。