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In this work,the framework of Co nanoparticles and nitrogen-doped carbon nanotubes (Co/NCNTs) derived from metal-organic frameworks (MOFs) through solid pyrolysis was successfully synthesized in the atmosphere of H2 and Ar gases.The Co/NCNTs composites exhibited superior electrocatalytic performance for tert-butyl hydroquinone (TBHQ) oxidation due to the synergistic effect between chemical composition and the specific structure of Co nanoparticles and nitrogen-doped carbon nanotubes.It was found that the reaction underwent a quasi-reversible redox reaction with 37-fold higher anodic current for TBHQ at Co/NCNT-modified electrode when compared to bare glassy carbon electrode (GCE).In optimal condition,Co/NCNTs/GCE exhibited a linear range of 0.05-80.00 μmol·L-1 for detecting TBHQ,and the limit of detection (LOD) was estimated to be as low as 10 nmol·L-1 (signal/noise of S/N =3).Moreover,the asobtained modified electrode was successfully used to assay the content of TBHQ in edible oil samples.