金属掺杂复合催化剂对氧还原反应的电活性  

Electro-activity of Fe/Co/N/M catalysts for oxygen reduction reaction

作　　者：张玉晖[1] 易清风[1] 向柏霖[2] 

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201 [2]怀化学院化学与化学工程系,湖南怀化418000

出　　处：《电源技术》2015年第5期928-930,1028,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金项目(21376070;20876038);湖南省自然科学基金项目(14JJ2096)

摘　　要：将三聚氰胺与甲醛的聚合树脂产物与一定量的碳粉混合,在N2气氛中高温炭化后制得催化剂载体。将该催化剂载体与聚苯胺混合后,再分别加入Co(NO3)2·6 H2O、Fe Cl3·6 H2O或乙二胺,混合物在N2气氛下通过高温热处理制得氧阴极还原催化剂Fe/Co/N/M。采用扫描电镜、X射线衍射仪对催化剂进行了表征。利用循环伏安及旋转圆盘电极等电化学方法对催化剂的氧还原(ORR)性能进行了测试。结果表明,采用分步加入金属Fe和Co的方式得到的催化剂Fe/Co/N/M在碱性溶液中具有较好的ORR电催化活性,ORR电流密度(2 000 r/min)为8.4 m A/mg@-0.8 V(vs.SCE),ORR起始电位为-0.12 V(vs.SCE)。The mixture of the polymerization resin of melamine and formaldehyde with carbon power was carbonized at high temperature under N2 to obtain the catalyst carrier. After mixing the catalyst carrier and polyaniline, Co（NO3）2. 6 H2O, FeCl3.6 H2O or ethylenediamine was then added into the formed mixtures. The mixtures were treated at high temperature under N2 to synthesize the Fe/Co/N/M catalysts. SEM and XRD were used to characterize the catalyst. ORR activity of the catalysts was tested by CV and RDE techniques. The results show that the catalyst Fe/Co/N/M obtained through doping Fe and Co in two steps has better electrocatalytic activity for ORR. The ORR current density at 2 000 r/min is 8.4 mA/mg@-0.8 V（vs. SCE） and its onset potential is -0.12 V（vs. SCE） in alkaline solution.

关 键 词：非贵金属催化剂 燃料电池 氧还原反应 电催化 

分 类 号：TM911[电气工程—电力电子与电力传动]