CAJ | 학술논문

通过电化学方法制备以金属钛为基体的聚苯胺载铂电极(Pt/PAn/Ti),并通过扫描电镜和循环伏安法对该电极进行表征.通过研究甲醛在该电极上的电催化氧化行为,考察该电极对甲醛的电催化氧化活性.结果表明：Pt/PAn/Ti 电极对甲醛的电催化氧化作用与铂的沉积量有关；PAn 的存在使得铂微粒分散程度更好,有效面积更大,与相同铂沉积量的 Pt/Ti电极相比,甲醛在其上的正向扫描峰电流密度增加2.3倍,氧化峰电位负移40 mV,反向扫描氧化峰电流密度增加5倍,氧化峰电位负移30 mV；甲醛在 Pt/PAn/Ti 电极上正向扫描出现的氧化峰由液相传质过程控制,负向扫描的氧化峰由吸附行为控制.
통과전화학방법제비이금속태위기체적취분알재박전겁(Pt/PAn/Ti),병통과소묘전경화순배복안법대해전겁진행표정.통과연구갑철재해전겁상적전최화양화행위,고찰해전겁대갑철적전최화양화활성.결과표명：Pt/PAn/Ti 전겁대갑철적전최화양화작용여박적침적량유관；PAn 적존재사득박미립분산정도경호,유효면적경대,여상동박침적량적 Pt/Ti전겁상비,갑철재기상적정향소묘봉전류밀도증가2.3배,양화봉전위부이40 mV,반향소묘양화봉전류밀도증가5배,양화봉전위부이30 mV；갑철재 Pt/PAn/Ti 전겁상정향소묘출현적양화봉유액상전질과정공제,부향소묘적양화봉유흡부행위공제.
Polyaniline (PAn)was loaded on Ti-based metal electrode and platinum was loaded on polyaniline,and Pt/PAn/Ti was prepared by cyclic voltammetry (CV)and was characterized by SEM and CV.Electrocatalytic oxidation of formaldehyde on platinum load on polyaniline electrode was investigated by reseaching the electrocatalytic oxidation of formaldehyde on Pt/PAn/Ti electrode.The result shows that electrocatalytic oxidation of formaldehyde was related with the quantity of platinum microparticles. Platinum microparticles were dispersed better, showing bigger effective area. Compared with that of the Pt/Ti electrode with the same quantity of platinum deposited,the peak current of formaldehyde in the positive scanning was increased 2.3 times and oxidation potential was negatively shifted by about 40 mV on Pt/PAn/Ti electrode.The peak current of formaldehyde in the negative scanning was increased about 5 times and oxidation potential was negatively shifted by about 30 mV.At the same time,the result shows,too that the oxidation peak in the positive scanning was controlled by liquid phase mass transfer process and the oxidation peak in the negative scanning was controlled by adsorption behavior.