Metal Phthalocyanine-Porphyrin-based Conjugated Microporous Polymer-derived Bifunctional Electrocatalysts for Zn-Air Batteries.,Chemistry - An Asian Journal

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Metal Phthalocyanine-Porphyrin-based Conjugated Microporous Polymer-derived Bifunctional Electrocatalysts for Zn-Air Batteries.
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-05-10 , DOI: 10.1002/asia.202000438
Yan Li ₁ , Xisheng Tao ₁ , Juncheng Wei ₁ , Xiaoling Lv ₁ , Heng-Guo Wang _{1,

2}

Affiliation

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.

中文翻译：

基于金属酞菁-卟啉的共轭微孔聚合物衍生的锌-空气电池双功能电催化剂。

共轭微孔聚合物（CMPs）是新兴的具有多种结构和可调结构单元的多孔材料，在电化学领域引起了广泛的关注。在此，我们设计了基于酞菁-卟啉的共轭微孔聚合物，作为制造Co，Fe，N三掺杂石墨烯复合材料的前体，以实现氧还原和析出反应（ORR / OER）。正如预期的那样，钴和铁元素很好地分散在石墨烯碳中并与氮位点相互作用，从而提供了额外的电催化活性位点并增强了其总体电导率。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的正起始电势为0.957 V，OER的低过电势为0.36V。更吸引人的是^-2和20000 s的良好循环稳定性。酞菁-卟啉基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。

更新日期：2020-07-01

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