FeP(Fe_2P)纳米颗粒/氮掺杂碳纳米复合结构的控制合成与电催化性能研究

Control Synthesis and Electrocatalytic Properties of Nanocomposites Films Comprising FeP(Fe_2P) Nanoparticles Embedded in N-Doped Porous Carbon Skeleton

采用溶液聚合法一步合成铁离子改性、植酸掺杂的聚苯胺,在800~900℃氩氢还原气氛下,将电催化析氢性能良好的磷化铁与磷化亚铁颗粒,负载在高温裂解聚苯胺高分子生成的网络多孔碳骨架上。制备了FeP(Fe_2P)纳米颗粒/多孔氮掺杂碳(NC)复合催化剂薄膜,通过扫描电子显微镜和X射线衍射分析表征了催化剂的微观结构。样品的催化性能采用线性扫描伏安法测试。结果表明,850℃条件下,得到的催化剂同时具有最好的电解水析氢及氧还原催化活性。

A novel type oflhecatalytic nanocompositesfilm, comprising FeP （FezP） nanoparticles embedded in N-doped porous carbon skeleton, was developed via chemical route. First, the aniline monomers gel was synthesized; next, the Fe-doped polyaniline gel was prepared by one-step solution synthesis with aniline and phytic acid as the C- and P-sources,respectively,and with FeC13 solution as the dopant;and finally, the Fe-doped polyaniline gel, after freeze-drying, was rapidly pyrolysized at temperature about 800 -900℃ in H2 ＋ Ar atmosphere. The microstruetures and electro-catalytic behavior of the pyrolysized films were characterized with scanning electron microscopy, transmission electron microscopy and linear sweep voltammetry. The results show that the composites films consisted of the FeP （Fe2P） nanoparticles embedded in N-doped, highly porous C-skeleton. The nano-composites films displayed the best catalytic activity for both hydrogen evolution and oxygen reduction at 850℃, possibly because of the increased active surfaces of FeP （Fe2P） nano-particles.