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首页> 外文期刊>International Journal of Electrochemistry >Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose Biosensor
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Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose Biosensor

机译：玻碳上钯金共沉积物上过氧化氢的电催化还原：在无干扰葡萄糖生物传感器设计中的应用

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Following our previous studies on the catalytic activity electrochemically codeposited on graphite Pd-Pt electrocatalysts for hydrogen peroxide electroreduction, a series of glassy carbon electrodes were modified with Pd or (Pd+Au) deposits aiming at the development of even more efficient electrocatalysts for the same process. The resulting electrodes were found to be very effective at low applied potentials (−100and−50 mV versus Ag/AgCl, 1 M KCl). The surface topography of the electrode modified with Pd+Au mixed in proportions 90% : 10%, exhibiting optimal combination of sensitivity and linear dynamic range towards hydrogen peroxide electrochemical reduction, was studied with SEM and AFM. The applicability of the same electrode as transducer in an amperometric biosensor for glucose assay was demonstrated. At an applied potential of−50 mV, the following were determined: detection limit (S/N=3) of6×10−6 M glucose, electrode sensitivity of 0.15 μAμM−1, and strict linearity up to concentration of3×10−4 M.
机译：在我们先前对电化学共沉积在石墨Pd-Pt电催化剂上进行过氧化氢电解还原的催化活性进行的研究之后，用Pd或（Pd + Au）沉积物修饰了一系列玻璃碳电极，旨在开发用于该电极的甚至更高效的电催化剂。处理。发现所得电极在低施加电势下（相对于Ag / AgCl为-100和-50 mV，为1 M KCl）非常有效。用SEM和AFM研究了以90％A：10％的比例混合Pd + Au修饰的电极的表面形貌，对过氧化氢电化学还原反应具有灵敏度和线性动态范围的最佳组合。证明了与换能器相同的电极在安培生物传感器中用于葡萄糖测定的适用性。在−50 mV的施加电势下，确定了以下条件：检测极限（S / N = 3）为6×10-610M葡萄糖，电极灵敏度为0.15μAμM-1，直至浓度为3×10-4时都具有严格的线性M.

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