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Issue 18, 2018
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An ethynyl-linked Fe/Co heterometallic phthalocyanine conjugated polymer for the oxygen reduction reaction

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Abstract

The Sonogashira–Hagihara coupling reaction is utilized to fabricate ethynyl-linked phthalocyanine (Pc) 2D conjugated polymers (CPs), affording the unprecedented heterometallic compound Fe0.5Co0.5Pc-CP and homometallic analogues MPc-CPs (M = Fe, Co) for comparison. It is confirmed that Fe and Co ions are well-defined/distributed with one metal ion encircled by four neighboring ions of the second metal in close proximity in the heterometallic conjugated polymer. Compared to the homometallic analogues, the bimetallic polymer Fe0.5Co0.5Pc-CP is more highly efficient for the oxygen reduction reaction (ORR), indicating that the interaction of Fe and Co ions may provide a synergistic effect on the activity. Fe0.5Co0.5Pc-CP exhibits similar ORR catalytic activity and superior stability compared to commercial Pt/C in alkaline media. Density functional theory calculations reveal that a fast 2 × 2e synergistic catalytic reaction pathway is essential for the excellent ORR in Fe0.5Co0.5Pc-CP.

Graphical abstract: An ethynyl-linked Fe/Co heterometallic phthalocyanine conjugated polymer for the oxygen reduction reaction

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Publication details

The article was received on 16 Jan 2018, accepted on 03 Apr 2018 and first published on 05 Apr 2018


Article type: Paper
DOI: 10.1039/C8TA00516H
Citation: J. Mater. Chem. A, 2018,6, 8349-8357
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    An ethynyl-linked Fe/Co heterometallic phthalocyanine conjugated polymer for the oxygen reduction reaction

    W. Liu, Y. Hou, H. Pan, W. Liu, D. Qi, K. Wang, J. Jiang and X. Yao, J. Mater. Chem. A, 2018, 6, 8349
    DOI: 10.1039/C8TA00516H

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