The synthesis of a lanthanum metal–organic framework and its sensitivity electrochemical detection of H2O2

A lanthanum metal–organic framework, [La(BTC)(H2O)(DMF)] (H3BTC = 1, 3, 5-benzenetricarboxylic acid), was synthesized under mild hydrothermal conditions. The synthesized [La(BTC)(H2O)(DMF)] was characterized by scanning electron microscopy in combination with energy dispersive X-ray spectroscopy (SEM/EDS), transmission electron microscopy (TEM), X-ray diffraction (XRD), and fourier transform infrared spectroscopy (FT-IR). Its electrochemical properties and electrocatalytic activity towards H2O2 reduction in acidic media were studied by cyclic voltammetry (CV) and amperometric current–time response. The [La(BTC)(H2O)(DMF)] modified electrode shows good electrochemical behavior and performs well electrocatalytic activity towards hydrogen peroxide (H2O2) reduction at ca. −0.7 V. The modified electrode displays a linear range from 5 μM to 2.67 mM and a limit of detection of 0.73 μM to H2O2. The [La(BTC)(H2O)(DMF)] modified electrode also possesses good selectivity and stability. Thus, [La(BTC)(H2O)(DMF)] will be a promising material for non-enzymatic H2O2 sensor.