Synthesis of one-dimensional vanadium-doped Co@CNT for highly efficient methanol oxidation reaction by oxygen vacancies engineering

Synthesis of highly active and durable electrocatalysts is very important to enhance the reaction rate of methanol oxidation reaction (MOR). Herein, we reported the synthesis of vanadium-doped cobalt nanoparticles trapped in carbon nanotube ([email protected]), which was realized through one-step calcination of Zeolitic Imidazolate Framework-67 (ZIF-67) grown on V2O5 nanorods (V2O5@ZIF-67) with the assistance of dicyandiamide (DCDA). The results of experiment verified that because of the appearance of lower valence vanadium during the carbonization of DCDA, the synthesized [email protected] shows better MOR performance than [email protected] (direct carbonization of V2O5@ZIF-67 without using DCDA) in 1 M KOH + 1 M CH3OH. For the MOR||HER test, at 1.45 V, [email protected] shows an excellent stable current density of 7 mA/cm2.