Fe基有序介孔碳催化剂的制备及其氧还原性能  

Synthesis of Fe based ordered mesoporous carbon catalyst and its oxygen reduction reaction

作　　者：李赏[1] 田青 康欢[1] 王家堂[1] 潘牧[1] LI Shang;TIAN Qing;KANG Huan;WANG Jia-tang;PAN Mu(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Key Laboratory of Huboi Province for Fuel Cell,Wuhan University of Technology,Wuhan Hubei 430070,China)

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室燃料电池湖北省重点实验室,湖北武汉430070

出　　处：《电源技术》2018年第11期1675-1678,1681,共5页Chinese Journal of Power Sources

基　　金：国家重点研发计划(2016YFB0101300;2016YFB-0101313)

摘　　要：采用乙醇挥发自组装法,以F127为模版,甲阶酚醛树脂为碳源,NH3为氮源合成了有序多级孔的掺氮Fe基非贵金属催化剂。利用TEM,BET,XPS、LSV等方法对催化剂的成分、形貌和氧还原性能进行了表征。结果表明当Fe与苯酚的摩尔比为0.1时,得到的Fe0.1-N-OMC催化剂氧还原催化活性最好,在酸性溶液中,起始电位达到0.82 V(vs.RHE),半坡电势为0.73 V(vs.RHE),催化剂的有序介孔结构提高了催化剂的比表面积,最高可达1 218 m2/g。使有序介孔Fe基催化剂表现了优良的氧还原催化性能和稳定性。催化剂经过石墨化和氮气热处理后,氧还原性能变化规律和催化剂中吡啶氮的含量一致。Nitrogen-doped and Fe based ordered mesoporous carbon catalysts were synthesized by ethanolevaporation induced self-assembly using triblock copolymer Pluronic F127 as a template, phenol-formaldehyde resinas the carbon precursor,and NH3as the nitrogen source.TEM,BET,XPS and LSV techniques were used to charac-terize the composition, morphology and oxygen reduction performance of the catalysts. When the molar ratio of Feand phenol is 0.1 ： 1, the ORR performance of FeO2-N-OMC is optimal, with the onset potential of 0.82 V vs. RHEand the half-wave potential of 0.73 V vs. RHE in acid media. The ordered mesoporous structure of catalyst canincrease the specific surface area to 1 218 m2/g making Fe based ordered mesoporous carbon catalysts demonstrateawesome ORR catalytic performance and stability. The ORR performance trend of catalysts after graphitization andheat treatment in N2 is consistent with the content of pyridinic N in catalyst.

关 键 词：质子交换膜燃料电池 非贵金属催化剂 有序介孔 氧还原反应 

分 类 号：TM911.4[电气工程—电力电子与电力传动]