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利用循环伏安以及稳态极化曲线等方法研究了在 1 mol· L- 1 KOH溶液中,乙醇在电沉积 Ni-Mo合金电极上氧化的电化学特性 .提出了一个数学模型来预计乙醇在电沉积 Ni-Mo合金电极上的电化学行为 .在碱性溶液中, Ni(OH)2/NiOOH电对的氧化还原过程是乙醇氧化的前期步骤 .Ni(OH)2/NiOOH电对相应的速度常数(即 k1和 k- 1)是电极电位的函数 .乙醇氧化是通过一个速度常数为 kC1的化学反应来完成 .推导出了各个动力学方程并将实验数据与方程进行比较而获得各个动力学参数 .电化学速度常数 k1(E)=1.41× 107exp(0.5FE/RT) mmol· cm- 2· s- 1以及 k- 1(E)=0.711exp(0.5FE/RT) mmol· cm- 2· s- 1,E是相对饱和甘汞电极( SCE)的电极电位 .而化学反应的速度常数 kC1=1.99× 10- 4 cm· s- 1.
The electrochemical characteristics of ethanol oxidation over electrodeposited Ni-Mo alloy electrode in 1 mol·L-1 KOH solution were investigated by cyclic voltammetry and steady-state polarization curves. A mathematical model was proposed to predict the oxidation of ethanol over The electrochemical behavior of electrodeposited Ni-Mo alloy electrode is that in the alkaline solution, the redox process of Ni (OH) 2 / NiOOH pair is the first step of ethanol oxidation.Ni (OH) 2 / The velocity constants (ie k1 and k-1) are a function of the electrode potential. Ethanol oxidation is accomplished by a chemical reaction of a rate constant kC1. The kinetic equations are deduced and the experimental data are compared with the equations to obtain the individual kinetic Electrochemical rate constant k1 (E) = 1.41 × 10 7 exp (0.5 FE / RT) mmol · cm -2 · s -1 and k -1 E = 0.711 exp (0.5 FE / RT) mmol · cm -1 2 · s-1, E is the electrode potential of the relative saturated calomel electrode (SCE), while the rate constant of the chemical reaction kC1 = 1.99 × 10 -4 cm · s -1.