摘要
以三聚氰胺、甲醛为单体,硝酸钴为金属前驱体,采用溶胶-凝胶法制备了氮掺杂的有机气凝胶,在氩气气氛中高温炭化制得氮掺杂碳气凝胶负载钴氧还原电催化剂(Co-CA-N).使用XRD、元素分析、全自动比表面积及微孔分析等方法对催化剂结构进行了表征.在0.5mol·L-1H2SO4溶液中应用循环伏安法和旋转圆盘电极检测催化剂氧还原活性,用商品PtRu/C作为阳极催化剂,自制Co-CA-N为阴极催化剂,采用喷涂法制备了膜电极,并组装了DMFC单电池,考察了Co-CA-N对DMFC单电池性能的影响.实验结果显示:Co-CA-N具有较好的氧还原催化活性.
N-doped carbon aerogel composites were obtained from organic aerogels prepared with melamine,formaldehyde,and cobalt nitrate,followed by carbonization. The activity of the electrocatalysts for the oxygen reduction reaction （ORR） was investigated using cyclic voltammeter （CV） and the rotating disk electrode （RDE） technique in 0.5 mol/L H2SO4 solution. Single cell was constructed using PtRu/C （Johnson Matthey Inc） as anode catalyst,the self-made Co-CA-N as cathode catalyst,the treated Nafion 117 membrane （DuPont） as proton exchange membrane. The fuel cell performance of single cells with the electrocatalysts was examined under actual DMFC conditions. Cobalt supported on N-doped carbon aerogels electrocatalysts showed good electrocatalytic activity for the oxygen reduction in acidic solutions.
出处
《材料研究与应用》
CAS
2010年第4期463-466,共4页
Materials Research and Application
基金
国家自然科学基金(21076048)
广东省科技计划项目(2009B011000022)
广州市科技计划项目(2009J1-C431-1)
关键词
钴
氮掺杂
氧还原反应
电催化
cobalt
n-doped
oxygen reduction reaction
electrocatalysis
