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首页> 外文期刊>Electroanalysis >Electrocatalytic oxidation of dithionite at a cobalt(II)tetrasulfonated phthalocyanine and 5,10,15,20-tetrakis-(4-sulfonatophenyl)porphyrin cobalt(II) modified gold electrode in alkaline solution
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Electrocatalytic oxidation of dithionite at a cobalt(II)tetrasulfonated phthalocyanine and 5,10,15,20-tetrakis-(4-sulfonatophenyl)porphyrin cobalt(II) modified gold electrode in alkaline solution

机译：在碱性溶液中四硫合钴（II）酞菁和5,10,15,20-四-（4-磺酰基苯基）卟啉钴（II）修饰的金电极对连二亚硫酸盐的电催化氧化

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In this paper it is shown that the charge transfer kinetics of the oxidation of sodium dithionite at a gold electrode in alkaline Solution can be increased by modifying this electrode with cobalt(II)tetrasulfonated phthalocyanine, sodium salt (CoTSPc) or 5,10,15,20-tetrakis-(4-sulfonatophenyl)porphyrin cobalt(II), tetrasodium salt (CoTSPor). Electrodeposition of these catalysts is discussed as well as the oxidation of sodium dithionite at these immobilized catalysts. Despite an observed acceleration in the charge transfer kinetics, sodium dithionite is still oxidized irreversibly. However, the improvement in kinetics has beneficial consequences in the field of electroanalysis of sodium dithionite. Comparison of the oxidation at bare gold and modified gold electrodes showed that with improved charge transfer kinetics at the modified electrodes a higher sensitivity and selectivity and a much lower detection limit is obtained.
机译：本文表明，通过用四磺化钴（II）酞菁钴，钠盐（CoTSPc）或5,10,15修饰该电极，可以提高在金电极中碱性溶液中连二亚硫酸钠氧化的电荷转移动力学。 ，20-四-（4-磺酰基苯基）卟啉钴（II），四钠盐（CoTSPor）。讨论了这些催化剂的电沉积以及在这些固定化催化剂上连二亚硫酸钠的氧化。尽管观察到了电荷转移动力学的加速，连二亚硫酸钠仍不可逆地被氧化。然而，动力学的改进在连二亚硫酸钠的电分析领域中具有有益的结果。裸金电极和修饰金电极上的氧化比较表明，修饰电极上的电荷转移动力学提高，灵敏度和选择性更高，检测极限更低。

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