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首页> 外文期刊>Electrochimica Acta >Electrochemical sensing of dopamine and pyrogallol on mixed analogue of Prussian blue nanoparticles modified electrodes-Role of transition metal on the electrocatalysis and peroxidase mimetic activity
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Electrochemical sensing of dopamine and pyrogallol on mixed analogue of Prussian blue nanoparticles modified electrodes-Role of transition metal on the electrocatalysis and peroxidase mimetic activity

机译：普鲁士蓝纳米粒子修饰电极的混合类似物上多巴胺和邻苯三酚的电化学传感-过渡金属在电催化和过氧化物酶模拟活性上的作用

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摘要

The electrochemical sensing of dopamine and pyrogallol using mixed copper-iron hexacyanoferrate (Cu-FeHCF) nanodispersion is investigated to understand the dependence of the same on hetero transition-metal ions. We also investigated that Prussian blue and its mixed metal analogues of Mn, Ni and Cu (i.e. Mn-FeHCF, Ni-FeHCF and Cu-FeHCF) possess intrinsic peroxidase like activity capable of catalyzing the oxidation of dopamine (DA) and pyrogallol (Py) by H_2O_2. The relative variation in catalytic activity based on both electrochemical and spectroscopic measurements of FeHCF, Mn-FeHCF, Ni-FeHCF and Cu-FeHCF nanoparticles is examined for DA sensing and found in the order of: Cu-FeHCF > Mn-FeHCF > Ni-FeHCF > FeHCF. Furthermore, the electrocatalytic activity of Cu-FeHCF towards the DA and Py is also examined based on differential pulse voltammetry. In addition to that, the Cu-FeHCF nanomaterial exhibits excellent electrocatalytic activity with the catalytic rate constant to the order of 1.05 × 10~2 and 2.34 × 10~2 M~(-1) s~(-1) for DA and Py respectively reflecting the introduction of differential electrocatalytic activity as a function of analytes (DA and Py).
机译：研究了使用铜-六氰合铁酸铜（Cu-FeHCF）混合纳米分散液对多巴胺和邻苯三酚的电化学传感，以了解它们对杂族过渡金属离子的依赖性。我们还研究了普鲁士蓝及其锰，镍和铜的混合金属类似物（即Mn-FeHCF，Ni-FeHCF和Cu-FeHCF）具有固有的过氧化物酶活性，能够催化多巴胺（DA）和邻苯三酚（Py ）通过H_2O_2。根据FeHCF，Mn-FeHCF，Ni-FeHCF和Cu-FeHCF纳米粒子的电化学和光谱测量结果，对催化活性的相对变化进行DA感测，并按以下顺序找到：Cu-FeHCF> Mn-FeHCF> Ni- FeHCF> FeHCF。此外，还基于差动脉冲伏安法研究了Cu-FeHCF对DA和Py的电催化活性。除此之外，Cu-FeHCF纳米材料还显示出优异的电催化活性，对于DA和Py，催化速率常数分别为1.05×10〜2和2.34×10〜2 M〜（-1）s〜（-1）。分别反映了根据分析物（DA和Py）引入不同的电催化活性的情况。

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