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A coordination polymer based on dinuclear (pyrazinyl tetrazolate) copper(II) cations and Wells-Dawson anions for high-performance supercapacitor electrodes

Abstract

A new coordination polymer (H2bpe)(Hbpe)2{[Cu(pzta)(H2O)][P2W18O62]}•5H2O (1) (pztaH = 5-(2-pyrazinyl) tetrazolate, bpe = bis(4-pyridyl)ethylene) was synthesized by hydrothermal method. The structure was determined by single-crystal X-ray diffraction analyses and further characterized by SEM, EDS, BVS, FTIR, and PXRD techniques. In 1, the [P2W18O62]6- (P2W18) clusters as bidentate connectors link [Cu(pzta)(H2O)]24+ dinuclear copper (II) complexes forming inorganic-organic chains. These chains and the [H2bpe]2+ counter-cations are fused together via hydrogen-bondings forming a 3D supramolecular architecture. While 1 was employed as electrode in supercapacitor, the cycling stability (90.7% capacitance retention after 1000 circles), and specific capacitance (168 F g-1 at a current density of 5 A g-1) of the 1-based electrode is better than the parent α-K6P2W18O62-based electrode, demonstrating more outstanding electrochemical performances of 1. Beside, 1-based electrode showed excellent electrocatalytic activities towards reduction of H2O2 and KIO3.

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Supplementary files

Publication details

The article was received on 20 Jun 2017, accepted on 03 Sep 2017 and first published on 04 Sep 2017


Article type: Paper
DOI: 10.1039/C7DT02230A
Citation: Dalton Trans., 2017, Accepted Manuscript
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    A coordination polymer based on dinuclear (pyrazinyl tetrazolate) copper(II) cations and Wells-Dawson anions for high-performance supercapacitor electrodes

    G. Wang, T. Chen, S. Li, H. Pang and H. Ma, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT02230A

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