Li Yan, Tao Xisheng, Wei Juncheng, Lv Xiaoling, Wang Heng-Guo
School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, China.
Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun, 130103, China.
Chem Asian J. 2020 Jul 1;15(13):1970-1975. doi: 10.1002/asia.202000438. Epub 2020 May 25.
Conjugated microporous polymers (CMPs) as emerging porous materials with diverse structures and tunable building-units have attracted much attention in the electrochemical field. Herein, we designed phthalocyanine-porphyrin-based conjugated microporous polymers as precursors for fabrication of Co, Fe, N tri-doped graphene composites towards oxygen reduction and evolution reaction (ORR/OER). As expected, the elements cobalt and iron are well dispersed in graphene carbon and interact with the nitrogen sites, thereby providing extra electrocatalytic active sites and enhancing its overall conductivity. Benefiting from its unique design and structure, the obtained catalyst affords a superior bifunctional catalytic activity with a positive onset potential of 0.957 V for ORR, and a low overpotential of 0.36 V for OER. More attractively, the CoFeNG is employed as an air cathode catalyst in Zn-air batteries, showing a maximum current density of 215 mA cm and good cycle stability for 20000 s. The rational design of phthalocyanine-porphyrin-based derivatives provides a feasible route for the construction of high-performance ORR/OER catalysts.
共轭微孔聚合物（CMPs）作为具有多样结构和可调节构筑单元的新型多孔材料，在电化学领域备受关注。在此，我们设计了基于酞菁 - 卟啉的共轭微孔聚合物作为前驱体，用于制备钴、铁、氮三掺杂石墨烯复合材料，以用于氧还原和析氧反应（ORR/OER）。正如预期的那样，钴和铁元素在石墨烯碳中良好分散，并与氮位点相互作用，从而提供额外的电催化活性位点并提高其整体导电性。得益于其独特的设计和结构，所获得的催化剂具有优异的双功能催化活性，ORR的正起始电位为0.957 V，OER的低过电位为0.36 V。更具吸引力的是，CoFeNG被用作锌空气电池的空气阴极催化剂，显示出215 mA cm的最大电流密度和20000 s的良好循环稳定性。基于酞菁 - 卟啉的衍生物的合理设计为构建高性能ORR/OER催化剂提供了一条可行的途径。
