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Abstract: A new Cu metal–organic framework (Cu-MOF), [Cu(adp)(BIB)(H2O)] n (BIB=1,4-bisimidazolebenzene; H2adp=adipic acid), is synthesised under hydrothermal conditions. Single-crystal X-ray analysis reveals a three-dimensional supramolecular architecture with channels originating from two-dimensional layers extended by hydrogen bonds. The cyclic voltammogram of a [Cu(adp)(BIB)(H2O)] n -modified electrode shows a pair of redox peaks at ca. 0.43V in 0.1M NaOH solution corresponding to CuIII(OH)-MOF/CuII(H2O)-MOF couple. The Cu-MOF-modified electrode shows high electrocatalytic activity towards H2O2 oxidation with a linear range from 0.1μM to 2.75μM and a detection limit of 0.068μM. Thus, Cu-MOF is a promising material for H2O2 detection. [Copyright &y& Elsevier]