摘要
采用碳黑作为载体,水合肼为还原剂,利用化学还原沉积法制备了Pt/C、Pt-Sn/C系列催化剂.催化剂粉末的晶体结构用XRD技术进行了表征.通过循环伏安与电流-电位极化曲线的测量研究了甲酸在不同催化剂所制备的电极上的电催化氧化行为,同时研究了甲酸浓度和催化剂的配比对阳极性能的影响.实验表明,Pt-Sn/C电极的性能在高浓度的甲酸溶液中比较好;与Pt/C电极比较,Pt-Sn/C电极对甲酸的电化学氧化显示出高的活性;Pt-Sn/C催化剂的最佳配比为Pt 20%,Sn 6%.
Pt/C and Pt-Sn/C calalysts are prepared by chemical reduction deposition, using carbon black as carrier and hvdrazine hvdrate as reducing agent, Catalysts construetion is anzlyzed by X-ray powder diffraetion.Cyelic voltammetry and current-potential polarization has been used to investigate the electrocatalytic oxidation of of formic acid on Pt-Sn electrodes. At the same time, influences of formic acid concentration and catalysts proportion on performance of anodes are also studied. Result shows that Pt-Sn/C electrodes performance can be improved by increasing formic acid concentration. Compared with Pt/C electrodes, Pt-Sn/C electrodes exhibit high activity, the best proportion of Pt-Sn/C catalyst is Pt-20% , Sn-6%.
出处
《沈阳理工大学学报》
CAS
2007年第2期67-70,19,共5页
Journal of Shenyang Ligong University
关键词
甲酸
电催化氧化
催化剂
燃料电池
formic acid
electrocatalytic oxidation
catalyst
fuel cell
