Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (4): 961-967.doi: 10.1007/s40242-021-1199-y

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Highly Active Electrocatalyst Derived from ZIF-8 Decorated with Iron(III) and Cobalt(III) Porphyrin Toward Efficient Oxygen Reduction in Both Alkaline and Acidic Media

ZHENG Ruonan, ZHAI Zihui, QIU Chenxi, GAO Rui, LV Yang, SONG Yujiang   

  1. State Key Laboratory of Fine Chemicals &Dalian Key Laboratory of Core Materials and Units for Hydrogen Energy and Fuel Cells, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
  • Received:2021-04-30 Revised:2021-05-30 Online:2022-08-01 Published:2022-07-01
  • Contact: SONG Yujiang E-mail:yjsong@dlut.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.22090050, 22090053, 21974126, 21874121, 51803194), the Zhejiang Provincial Natural Science Foundation, China(No.LY19B030001), the Open-end Funds from the Engineering Research Center of Nano-Geomaterials of Ministry of Education, China(No.NGM2019KF013) and the Fundamental Research Funds for National Universities, China University of Geosciences(Wuhan).

Abstract: Zeolite imidazole frameworks 8(ZIF-8) and modified ones after pyrolysis are highly promising toward oxygen reduction reaction(ORR). Especially, the compositional modification of ZIF-8 is crucial to the enhancement of ORR performance, yet limited to the substitution of skeletal Zn(II) with other cations or simple physical adsorption of cations. Herein, we report the decoration of ZIF-8 with ORR active hemin(FeP) and Co(III) protoporphyrin(CoP) via the coordination between the peripheral carboxylic group of FeP and CoP with skeletal Zn(II). This allows well control over the quantity of loaded FeP and CoP, critical to the synthesis of advanced electrocatalysts. Subsequent pyrolysis of FeP and CoP co-decorated ZIF-8 leads to highly active ORR electrocatalysts with a half-wave potential(E1/2) of 0. 913 V(vs. RHE) in 0.1 mol/L KOH aq. and an E1/2 of 0.803 V(vs. RHE) in 0.1 mol/L HClO4 aq. Moreover, our electrocatalyst shows much more improved and comparable durability in alkaline and acidic media, respectively, during 3000 cycles of cyclic voltammetry(CV) scanning relative to commercial Pt/C.

Key words: Non-noble metal electrocatalyst, ZIF-8, Porphyrin, Oxygen reduction reaction(ORR)