近日，龚佳麟同学，王溦老师在电催化剂表面结构的优化中取得了新的突破！一项最新研究采用溶胶-凝胶方法成功合成了Fe-Fe3N复合三维掺氮碳框架（Fe-Fe3N/3DNC），并将其成功应用于锌空气电池的电催化剂。这一复合材料具备独特的多维交联框架结构，由一维和二维交联组成，极大地降低了氧在电极中的扩散平均自由路径。铁氮位点和富固氮碳底物在氧还原反应（ORR）中展现出卓越的电催化活性。在传统液体锌-空气电池中，采用该材料作为空气阴极催化剂，最大功率密度达到了242.8 mW cm−2，超越了商用的Pt/C。这一研究为氧还原反应电催化剂的开发提供了宝贵的见解，为新一代电池技术的发展打开了新的方向。
Taking into consideration the sluggish kinetics of the oxygen reduction reaction (ORR) and the distinct three phase environment of the electrode, it is crucial to optimize the surface structure of the electrocatalyst. This study employs a sol–gel approach to synthesize a Fe-Fe3N composite three-dimensional nitrogen-doped carbon framework (Fe-Fe3N/3DNC) and utilize it as the electrocatalyst for a zinc-air battery. The material possesses a multi-dimensional cross-linking frame structure comprised of one-dimensional and two-dimensional crosslinks, which effectively reduce the diffusion mean-free path of oxygen. Moreover, the iron–nitrogen site and nitrogen rich carbon substrate both exhibit exceptional electrocatalytic activity for ORR. Consequently, a conventional liquid zinc-air battery utilizing this material as the air cathode catalyst exhibits a maximum power density of 242.8 mW cm−2 , surpassing that of commercial Pt/C. Additionally, DFT calculations further confirm the crucial enhancing influence of Fe3N in the Fe-Fe3N/3DNC composite on ORR. This research provides valuable insights for the development of ORR electrocatalysts with outstanding efficiency.
论文题目：Fe-Fe3N composite nitrogen-doped carbon framework: Multi-dimensional cross-linked structure boosting performance for the oxygen reduction reaction electrocatalysis and zinc-air batteries
论文作者：Wei Wang , Jialin Gong , Qing Long , Haitao Wang , Junlin Huang , Wei Dang , Liang Chen , Gangyong Li , Zhaohui Hou , Wenyuan Xu .
