摘要
通过循环伏安的电化学方法在金属钛基体上先后进行苯胺的聚合和金属铂的电化学沉积,得到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了表征。通过研究甲醛在该电极上的电催化氧化行为,考察了载铂量对甲醛氧化效果的影响及PAn在电催化氧化甲醛的过程中所起的作用。结果表明,载铂量与甲醛的氧化有一定的关系,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氧化峰电流密度增加了2.3倍,电位负移了40mV;反向扫描氧化峰电流密度增加了5倍,电位负移了30mV。同时,PAn的存在也增强了电极的抗中毒能力。
Polyaniline(PAn) was electropolymerized on Ti-based metal electrode and Platinum was loaded on Polyaniline,Pt/PAn/Ti was prepared by cyclic voltammetry(CV)and was characterized by SEM and CV.Influence of platinum quantity and function of PAn were investigated by reseaching electrocatalytic oxidatiom of formaldehyde on Pt/PAn/Ti electrode.The result showed that electrocatalytic oxidation effect of formaldehyde has relationship with platinum quantity.Platinum microparticles were dispersed better and they had bigger effective area.compared with the Pt/Ti electrode deposited the same platinum quantity,the peak current of formaldehyde in the positive scanning increase 2.3times and oxidation potential was negative by about 40 mV on Pt/PAn/Ti electrode.The peak current of formaldehyde in the negative scanning increase about 5times and oxidation potential was negative by about 30 mV.At the same time,the result show too that the anti poisoning ability of Pt/PAn/Ti electrode was increased because of PAn.
出处
《高分子通报》
CAS
CSCD
北大核心
2015年第4期67-73,共7页
Polymer Bulletin
基金
安徽省高校自然科学重点基金(KJ2013A079)
关键词
钛电极
聚苯胺
循环伏安法
电催化氧化
甲醛
Ti electrode
Polyaniline
Cyclic voltammetry(CV)
Electrocatalytic oxidation
Formaldehyde
