基于天然产物的新型铁氮共掺杂碳电催化剂的制备及氧还原性能

摘要

A layered porous Fe-N-codoped carbon material(Fe-N-CM)was synthesized by sacrificial template method using cheap natural product red date as exclusive carbon source,g-C3N4 as sacrificial template and nitrogen source.The morphology and structure of Fe-N-CM were characterized by XRD,XPS,TEM and BET.The oxygen reduction reaction(ORR)performance of the obtained catalyst was evaluated by rotating disk electrode(RDE).The results show that Fe particles well dispersed are Fe-N-CM with high surface area(429.8 m2/g)and synergistic effect of Fe and N exhibits high ORR activity.And the long-term stability and methanol resistance of Fe-N-CM for ORR are even superior to commercial Pt/C.%以廉价天然植物果实红枣作为唯一碳源,采用牺牲模板法制备了一种具有层状多孔结构的铁氮共掺杂碳材料(Fe-N-CM).采用X射线粉末衍射、 X射线光电子能谱、透射电子显微镜、氮气吸-脱附仪和拉曼光谱对Fe-N-CM样品的形貌和结构进行了表征,用旋转圆盘电极及环盘电极对Fe-N-CM催化剂的氧还原反应(ORR)性能进行了研究.结果表明,所制备的层状多孔Fe-N-CM材料比表面积达到429.8 m2/g,铁颗粒在材料表面均匀分散,铁和氮的协同作用使Fe-N-CM具有良好的氧还原催化活性,其对氧还原反应的催化稳定性和抗甲醇性能优于商业Pt/C催化剂.