• 作者： Tien, Hsien-Ju; Hwang, Yuh-Ren; Hu, Chi-Changet al.
• 中文摘要： 4,4'-硝基偶氮苯係於石墨,銥釕氧化物,尖晶石型鎳鈷氧化物,二氧化鉛,氧化鈀及氧化鉑披覆電極上,於乙/水溶液中電解合成。其中乙體積百分比、氫氧離子濃度及陽極電解液溫度對產物之電解效率的影響也進行研究。結果發現產物之電解效率主要是受電極表面形成有機吸附層,造成電極電位大幅提高,使得氧氣產生速率加快而大幅降低。此外,經由電解產生之中間產物結合形成偶氮化物的活化能很低,隱含著此中間產物俱備自由基之特性。
• 英文摘要： 4,4'-Dinitroazobenzene was electrosynthesized from p- nitroaniline at graphite, (Ir-Ru) O/sub 2/, NiCo/sub 2/ O/sub 4/, PbO/sub 2/, PdO/sub y/ and PtO/sub x/-coated titanium electrodes in acetonitrile /water media. The influences of CH/sub 3/CN volume content, OH/sup -/ concentration, and anolyte temperature on the current efficiency (C.E.) of 4,4'-dinitroazobenzene formation were also investigated . The formation of 4,4'-dinitroazobenzene was found to be mainly depressed by the adsorption of a thick organic layer (mainly consisted of 4,4'- dinitroazobenzene) on the electrode surface, rendering an increase in electrode potentials during bulk electrolysis, which enhances the evolving rate of oxygen. The low activation energy for the chemical combination step of the 4,4'-dinitroazobenzene formation implied that the intermediate species oxidized from p-nitroaniline possessed radical properties.
• 中文關鍵字： 電解合成; 硝基偶氮苯; 硝基苯胺; 乙; 電流效率
• 英文關鍵字： Electrosynthesis; Dinitroazobenzene; Nitroaniline; Acetonitrile; Current Efficiency