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

作者：Wang, Guangning; Chen, Tingting; Li, Shaobin; Pang, Haijun^*; Ma, Huiyuan^*

来源：Dalton Transactions, 2017, 46(40): 13897-13902.

DOI：10.1039/c7dt02230a

• METAL-ORGANIC FRAMEWORKS
• REDUCED GRAPHENE OXIDE
• POLYOXOMETALATE
• PROTON
• NANOCOMPOSITE
• FOAM
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A new coordination polymer, (H(2)bpe)(Hbpe)(2){[Cu(pzta)(H2O)][P2W18O62]}center dot 5H(2)O (1) (pztaH = 5-(2- pyrazinyl) tetrazolate, bpe = bis(4- pyridyl) ethylene), was synthesized by the hydrothermal method. The structure was determined by single crystal X- ray diffraction analyses and further characterized by the SEM, EDS, BVS, FTIR, and PXRD techniques. In 1, the [P2W18O62](6-) (P2W18) clusters as bidentate connectors link [Cu(pzta) (H2O)](2)(4+) dinuclear copper(II) complexes to form inorganic-organic chains. These chains and the [H(2)bpe](2+) counter-cations are fused together via hydrogen bonding to form a 3D supramolecular architecture. While 1 was employed as the electrode in a 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 are better than those of the parent alpha-K6P2W18O62-based electrode, demonstrating more outstanding electrochemical performances of 1. Besides, the 1-based electrode showed excellent electrocatalytic activities towards the reduction of H2O2 and KIO3.

• 出版日期2017-10-28
• 单位黑龙江大学; 哈尔滨学院; 齐齐哈尔大学; 哈尔滨师范大学