© 2021At present, monometallic Sn/MWCNT nanocatalyst and bimetallic PdSn/MWCNT nanocatalysts are synthesized by the NaBH4 reduction method to investigate their activities in hydrazine electrooxidation (HEO) reaction. 5% Pd80Sn20/MWCNT nanocatalysts are characterized via N2 adsorption desorption, X-ray diffractometer (XRD), and transmission electron microscopy (TEM). Electrochemical activities and charge transfer resistances (Rct) of all prepared nanocatalysts are studied via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Results reveal that Sn addition to Pd improves HEO activities. In addition, 5% Pd80Sn20/MWCNT nanocatalyst shows the highest activity with 13.70 mA cm−2 (4029.58 mA mg−1 PdSn) current density value in HEO. Furthermore, 5% Pd80Sn20/MWCNT nanocatalyst displays the lowest charge transfer resistance. Results reveal PdSn/MWCNT nanocatalysts with high current values than literature reported values are promising nanocatalysts for hydrazine fuel cells.