鈷紫質-白金修飾電極的製備及其電催化反應

Preparations of Cobalt Porphyrin-Platinum Modified Electrodes and Their Electrocatalytic Reactions

薛勝有(Sheng-You Shiue)

指導教授 ： 鄭淑華

國立暨南國際大學/科技學院/應用化學系/碩士(2007年)

https://doi.org/10.6837/NCNU.2007.00059

摘要

本論文以逐層自組裝（ layer-by-layer self-assembly ）方法製備水溶性鈷紫質 CoIII(TMPyP)5+[ cobalt（III） tetrakis（N-methyl-4-pyridyl）porphyrin ]和白金金屬顆粒（ platinum particle ）的複合修飾電極。在氯化鉀（ potassium chloride ） 水溶液中，以電化學氧化方法將對-氨基苯磺酸鈉（ sodium 4-aminobenzenesulfonate, 4-ABS ）修飾在網版印刷電極（ screen-printed electrode, SPE ）上，再藉由靜電相吸將鈷紫質CoIII(TMPyP)5+ 及氯鉑酸鉀[ potassium hexachloroplatinate(IV), K2PtCl6 ]依序地修飾於網版印刷電極，製備成具有多層結構的修飾電極。利用電化學將 [PtCl6]2- 還原形成白金金屬顆粒，完成 CoIII(TMPyP)5+/Pt 的複合修飾電極。
將複合修飾電極應用於電催化氧化半胱氨酸（ cysteine ），以循環伏特安培法在 0.5 M 氫氧化鈉溶液中偵測 10 mM 半胱氨酸，催化電流為最大值 66 μA 且催化電位為 -0.08 V，減少約 0.4 V 的過電位。

關鍵字

水溶性鈷紫質 ； 白金金屬顆粒 ； 網版印刷電極 ； 半胱氨酸

並列摘要

The study investigates the preparation of water-soluble cobalt（III） tetrakis（N-methyl-
4-pyridyl）porphyrin[　CoIII(4-TMPyP)5+ ] and platinum particle complexes-modified
electrode through layer-by-layer self-assembly method. The electrochemical oxidation of sodium 4-aminobenzenesulfonate in potassium chloride aqueous solution leads to formation of amine cation radical, which subsequently formed 4-ABS-modified SPE. CoIII(4-TMPyP)5+　and K2PtCl6 were alternately deposited on a 4-ABS-modified SPE based on electrostatic interaction, and the multilayer films modified electrodes were fabricated. The CoIII(4-TMPyP)5+/Pt particle films was fabricated by electrochemical reduction.
The complexes-modified electrode exhibits electrocatalytic activity for the oxidation of cysteine. At the electrooxidation of 10 mM cysteine in 0.5 M NaOH solution, reducing the overpotential by about 0.4 V, and the maximum catalytic current and the catalytic potential obtained from cyclic voltammetry were 66 μA and -0.08 V, respectively.

並列關鍵字

water-soluble cobalt porphyrin ； platinum particle ； screen-printed electrode ； cysteine

參考文獻

1. Murray, R. W.; Ewing, A. G.; Durst, R. A. Anal. Chem. 1987, 59, 379A-390A.

2. Zen, J.-M.; Kumar, A. S.; Tsai, D.-M. Electroanalysis 2003, 15, 1073-1087.

3. Dicu, D.; Muresan, L.; Popescu, I. C.; Cristea, C.; Silberg, I. A.; Brouant, P. Electrochim. Acta 2000, 45, 3951-3957.

4. Caro, C. A.; Bedioui, F.; Zagal, J. H. Electrochim. Acta 2002, 47, 1489-1494.

5. Sellers, H.; Ulman, A.; Shnidman, Y.; Eilers, J. E. J. Am. Chem. Soc. 1993, 115, 9389-