Preparation and Characterization of Inorganic Metal Hexacyanoruthenate Films and Their Electrocatalytic Properties with Dopamine and Sulfur Oxoanions

• Main Authors: Sheh-Hung Hsueh, 薛世鴻
• Other Authors: Shen-Ming Chen
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/42318911477177765515

碩士 === 國立臺北科技大學 === 化學工程系碩士班 === 91 === This paper can be separated into three parts. PartⅠ.Iron ruthenocyanide films have been prepared using consecutive cyclic voltammetry, the deposition process and the films’ electrocatalytic properties in electrolytes containing various cation have been investigated. The cyclic voltammograms recorded the deposition of Rp films directly from the mixing of Fe3+ and Ru(CN)64- ions from the solutions of six cations; Li+、 Na+、K+、Rb+、Cs+和Tl+. An electrochemical quartz crystal microbalance,cyclic voltammetry,UV-visible spectroscopy,and the stopped-flow method were used to study the growth mechanism of RP films. The RP films showed a single redox couple with a formal potential that demonstrates a cation effect. The electrocatalytic reduction properties of NO2- by the RP films were determined. The electrocatalytic oxidation properties of dopamine were also determine. The electrocatalytic reactions of the RP films were investigated using the rotating ring-disk electrode method. PartⅡ. Polynuclear mixed-valent ruthenium oxide/ruthenocyanide (ruthenium oxide/hexacyanoruthenate or mvRuO/RuCN) films have been prepared using consecutive cyclic voltammetry directly from the mixing of Ru3+ and Ru(CN)64- ions from the solutions of seven monovalent cations: H+, Li+, Na+, K+, Rb+, Cs+, and Ga+. The films have been prepared and showed three redox couples in divalent cation of Ba(NO3)2 or BaCl2 aqueous solution, and the formal potentials of the redox couples that demonstrates a cation effect and pH effect. The electrocatalytic reduction properties of SO52-, and S2O82- by the ruthenium oxide/ ruthenocyanide films were determined, and shown the cathodic peak current of the film redox couple increased, while its anodic peak current decreased as the concentration of sulfur oxoanions increased. The electrocatalytic oxidation of NADH, dopamine were also determined. PartⅢ. Ruthenium oxide/ruthenocyanide(Ruthenium oxide/ Hexacyanoruthenate, mvRuO/RuCN) and iron(III) ruthenocyanide(ruthenium purple, RP) hybrid films have been prepared using consecutive cyclic voltammetry. The hybrid film of ruthenium oxide/ruthenocyanide and ruthenium purple films showed four redox couples with formal potentials between —0.2 V and +1.0 V in monovalent cation of RbNO3 or CsNO3 aqueous solution. An electrochemical quartz crystal microbalance(EQCM), cyclic voltammetry were used to study the growth mechanism and ion exchange properties of the hybrid films. The electrocatalytic reduction properties of SO52-, and S2O82- by the hybrid films were determined. The electrocatalytic oxidation properties of dopamine and epinephrine were also determined. The electrocatalytic reactions of the hybrid films were investigated using the rotating ring-disk electrode method.