A New Anderson‐Type Polyoxometalate‐Based Metal‐Organic Complex for Multi‐Functional Electrochemical Application

Abstract A new Anderson‐type polyoxometalate(POM)‐based one‐dimensional metal‐organic complex, namely, H 2 [Cu 2 [AlMo 6 (OH) 6 O 18 ] 2 (3‐bpah) 4 (H 2 O) 4 ] ⋅ 6H 2 O ( 1 ) (3‐bpah=N−N′‐bis(3‐pyridinecarboxamide)‐1,2‐cyclohexane) was synthesized by hydrothermal method. Implement basic characterization operations of single crystal X‐ray diffraction, IR spectroscopy, X‐ray powder diffraction and thermogravimetric analysis were performed. Complex 1 possesses not only the typical electrochemical behavior of the Anderson‐type polyoxoanion, but also excellent electrochemical stability. The carbon paste electrode bulk modified by complex 1 ( 1 ‐CPE) can be used as an ampere sensor to detect potassium nitrite. The carbon cloth‐based electrode fabricated by complex 1 ( 1 ‐CC)was capable of being used as electrocatalyst for hydrogen evolution reaction, the overpotential is 480 mV at the current density of 10 mA cm −2 . 1 ‐CC can also be used as capacitor electrode, which shows an area capacitance of 293 mF cm −2 in 0.1 M H 2 SO 4 solution and up to 10 hours of life stability. It can maintain 89.7 % of the capacitance after 1000 cycles of constant current charge/discharge.