| 卟啉化合物的电催化行为V.金属卟啉化合物电极上胱氨酸还原反应的动力学及反应机理研究 |
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| 引用本文： | 邓中一,王宗礼,李长明,查全性. 卟啉化合物的电催化行为V.金属卟啉化合物电极上胱氨酸还原反应的动力学及反应机理研究[J]. 化学学报, 1987, 45(10): 931-937 |
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| 作者姓名： | 邓中一 王宗礼 李长明 查全性 |
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| 作者单位： | 武汉大学化学系 |
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| 摘 要： | 采用循环伏安法及带环的旋转圆盘电极技术,在经热处理的载于石墨粉上的四(对甲氧基苯基)卟啉钴(Co-TMPP/石墨)电极上研究了溶液pH值对胱氨酸还原反应的影响.实验结果表明,在不同pH值溶液中经热处理的Co-TMPP/石墨对 胱氨酸还原反应均有较好的催化活性且该电极上胱氨酸还原反应为不可逆的简单电荷传递反应.测出了不同pH值溶液中胱氨酸剂原反应的标准速度常数.当pH<4时,胱氨酸还原对[H^+]的反应级数为1;pH>9时,反应与[H^+]无关.提出了不同pH值溶液中胱氨酸还原反应的机理.
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| 关 键 词： | 卟吩P 胱氨酸 反应机理 金属催化剂 反应动力学 电解 钴络合物 还原反应 过渡金属络合物 电化学反应 |
The electrocatalysis of metalloporphyrins V. Kinetic study of cystine reduction on metal porphyrins adsorbed on graphite electrode |
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| DENG ZHONGYI,WANG ZONGLI,LI CHANGMING,CHA QUANXING. The electrocatalysis of metalloporphyrins V. Kinetic study of cystine reduction on metal porphyrins adsorbed on graphite electrode[J]. Acta Chimica Sinica, 1987, 45(10): 931-937 |
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| Authors: | DENG ZHONGYI WANG ZONGLI LI CHANGMING CHA QUANXING |
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| Abstract: | The electrocatalytic effects of heat-treated Co(II) tetramethoxyphenylporphyrin adsorbed on graphite electrode ((Co-TMPP)/graphite) on the cathodic reduction of cystine were investigated in solns. of various pH using cyclic voltammetry and rotating ring-disk electrode techniques. The current efficiency of such relations on thin layer Co-TMPP/graphite electrodes is about 80-90%. The standard rate constants (k0) of cystine reduction in solns. of various pH were calculated and the effects of pH value on the reaction mechanism and kinetics of cystine reduction catalyzed by Co-TMPP/graphite are discussed. |
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| Keywords: | PORPHINE P CYSTINE REACTION MECHANISM METAL CATALYST REACTION KINETICS ELECTROLYSIS COBALT COMPLEX REDUCTION REACTION TRANSITION METAL COMPLEX ELECTROCHEMICAL REACTION |
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