Abstract: We prepared ZIF-67 metal organic framework with copper partially replacing cobalt, and introduced Pt nanoparticles into ZIF-67 pore c
hannels. The samples were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Xray diffraction (XRD), and the electrochemical sensing performance was tested. The results show that the electrode modified by the noble metal and copper comodified ZIF-67 metalorganic framework has good crystallinity and uniform size. The enzymefree electrochemical sensors has good detection performance for hydrogen peroxide, such as high sensitivity, wide detection range, excellent selectivity and good repeatability.

Key words: metalorganic framework, noble metal catalysis, copper doping, hydrogen peroxide, electrochemical detection