Pure and Praseodymium (Pr)-doped CoFe2O4 magnetic nanoparticles (MNPs) were prepared by chemical oxidation method with optimized experimental parameters. The structural change with increasing doping concentration of Pr was observed from the X-ray diffraction analysis. The spherical morphology of the MNPs was confirmed from field emission scanning electron microscopy and transmission electron microscopy. Magnetic properties of the pure and Pr-doped CoFe2O4 are analyzed by vibrating sample magnetometer and thermomagnetic analysis measurements. The maximum saturation magnetization of 77 emu/g was observed for pure CoFe2O4 MNPs and decreasing with increasing Pr doping concentration. The curie temperature of CoFe2O4 MNPs is observed around 520 degrees C from TMA measurements. The increase in the current from the cyclic voltammetry results with increasing doping fraction of Pr is observed. The Galvanostatic charge/discharge results revealed that the higher specific capacitance of 121 F/g was achieved for the electrode prepared with 5% of Pr-doped CoFe2O4 MNPs. The cyclic stability test suggested that the 5% of Pr-doped CoFe2O4 MNPs electrode can show more than 97% of capacity retention even up to 5000 cycles. The observed electrochemical characteristics of the pure and Pr-doped CoFe2O4 MNPs suggested that the doping on CoFe2O4 MNPs could be adopted to tune the capacitance of the electrode for supercapacitor applications. C1 [Manikandan, V. S.; Abarzua, Carolina Venegas; Thirumurugan, Arun] Univ Atacama, Sede Vallenar, Costanera 105, Vallenar 1612178, Chile. [Kumar, T. Kavin] Karpagam Acad Higher Educ, Dept Phys, Coimbatore 641021, India. [Kumar, T. Kavin] Karpagam Acad Higher Educ, Ctr Energy & Environm, Coimbatore 641021, India. [Poobalan, Ranjith Kumar] Indian Inst Technol Indore, Dept Met Engn & Mat Sci MEMS, Khandwa Rd, Indore 453552, India. [Sakthivel, P.] Karpagam Acad Higher Educ, Fac Engn, Ctr Mat Sci, Dept Phys, Coimbatore 641021, Tamil Nadu, India. [Chidhambaram, N.] Rajah Serfoji Govt Coll, Dept Phys, Thanjavur 613005, Tamil Nadu, India. [Dineshbabu, N.] Karpagam Acad Higher Educ, Fac Engn, Dept Sci & Humanities Phys, Coimbatore 641021, Tamil Nadu, India. [Dhanabalan, Shanmuga Sundar] RMIT Univ, Funct Mat & Microsyst Res Grp, Melbourne, Vic 3000, Australia. [Morel, Mauricio J.] Univ Atacama, Fac Ciencias Nat, Dept Quim & Biol, Copiapo 1531772, Chile. C3 Universidad de Atacama; Karpagam Academy of Higher Education (KAHE); Karpagam Academy of Higher Education (KAHE); Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Indore; Karpagam Academy of Higher Education (KAHE); Karpagam Academy of Higher Education (KAHE); Royal Melbourne Institute of Technology (RMIT); Universidad de Atacama