Metal Phthalocyanine‐Porphyrin‐based Conjugated Microporous Polymer‐derived Bifunctional Electrocatalysts for Zn‐Air Batteries

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, F...

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Bibliographic Details
Published in:Chemistry, an Asian journal an Asian journal, 2020-07, Vol.15 (13), p.1970-1975
Main Authors: Li, Yan, Tao, Xisheng, Wei, Juncheng, Lv, Xiaoling, Wang, Heng‐Guo
Format: Article
Language:English
Subjects:
Bifunctional electrocatalyst
Catalysts
Catalytic activity
Chemistry
Doped graphene
Electrocatalysts
Graphene
Iron
Metal air batteries
Metal phthalocyanines
Nitrogen
Phthalocyanine
Polymers
Porous materials
Porphyrin
Prepolymers
Zinc
Zn-air battery
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Summary: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−2 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. Phthalocyanine‐porphyrin‐based conjugated microporous polymers were used to derive Co, Fe, N tri‐doped graphene, which could be used as high‐performance bifunctional oxygen electrocatalysts for rechargeable Zn‐air batteries.
ISSN:1861-4728
1861-471X
DOI:10.1002/asia.202000438