Wu Yinlong, Liang Guofeng, Chen Di, Li Zilong, Xu Jinchang, Huang Guoju, Yang Muzi, Zhang Hao, Chen Jian, Xie Fangyan, Jin Yanshuo, Wang Nan, Sun Shuhui, Meng Hui
Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong 510632, China.
Instrumental Analysis & Research Center, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.
ACS Appl Mater Interfaces. 2021 Oct 20;13(41):48923-48933. doi: 10.1021/acsami.1c15554. Epub 2021 Oct 10.
The earth-abundant iron and nitrogen doped carbon (Fe-N-C) catalyst has great potential to substitute noble metal catalysts for oxygen reduction reaction (ORR) in H-O proton exchange membrane fuel cells (PEMFCs). Herein, we report the preparation of Fe-N moiety doped carbon nanotubes (CNTs) by ball milling and two-step pyrolysis with dual metal-organic frameworks (MOFs) as the precursor. This catalyst shows high ORR catalytic performance and stability. Different from traditional inorganic iron sources, the MOF structure can effectively prevent the iron metal from aggregating during pyrolysis. In PEMFC, the catalyst shows high current density (0.39 A/cm at 0.7 V) and power density (850 mW/cm). Such a method brings inspiration for the reasonable design of FeNC catalysts with high catalytic activity for H-O PEMFCs.
地球上储量丰富的铁氮掺杂碳（Fe-N-C）催化剂在氢氧质子交换膜燃料电池（PEMFC）中替代贵金属催化剂用于氧还原反应（ORR）具有巨大潜力。在此，我们报道了以双金属有机框架（MOF）为前驱体，通过球磨和两步热解制备铁氮部分掺杂的碳纳米管（CNT）。该催化剂表现出高的ORR催化性能和稳定性。与传统无机铁源不同，MOF结构可有效防止铁金属在热解过程中聚集。在PEMFC中，该催化剂表现出高电流密度（在0.7 V时为0.39 A/cm）和功率密度（850 mW/cm）。这种方法为合理设计对氢氧PEMFC具有高催化活性的FeNC催化剂带来了启发。
