Abstract Simple drop-casting of the catalytically synthesized Prussian Blue nanoparticles with subsequent annealing results in modified electrodes with high electrochemical and electrocatalytic activity. The electroactive fraction of the deposited Prussian Blue being independent of the surface concentration, is decreased with an increase of the nanoparticles size reaching its lower saturation at approximately 25%. Sensitivity of the corresonding hydrogen peroxide sensor is increased linearly with the amount of Prussian Blue reaching its upper saturation together with formation of continuative film, indicating most probably, a nanoparticles monolayer. Due to their performance characteristics the Prussian Blue nanozymes modified electrodes would be highly attractive for corresponding sensors and biosensors.

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基于普鲁士蓝的纳米酶“人工过氧化物酶”的电化学和传感特性

摘要 催化合成的普鲁士蓝纳米粒子的简单滴铸和随后的退火导致具有高电化学和电催化活性的修饰电极。沉积的普鲁士蓝的电活性部分与表面浓度无关，随着纳米颗粒尺寸的增加而降低，达到其约 25% 的较低饱和度。相关过氧化氢传感器的灵敏度随着普鲁士蓝的量达到其饱和度上限以及连续膜的形成而线性增加，这表明最有可能是纳米颗粒单层。由于其性能特点，普鲁士蓝纳米酶修饰电极对相应的传感器和生物传感器非常有吸引力。