Hydrazine fuel cell is one of the promising liquid fuel cells because of high theoretical voltage, high energy density, and no green gas emission. However, hydrazine can be decomposed chemically or electrochemically as a function of the type of catalyst used. Platinum, despite a noble metal, is an ambiguous catalyst due to faradaic reaction catalyst of hydrazine as well non-faradaic reaction. Therefore, in the aspect of the fuel efficiency, platinum is not suitable for hydrazine catalyst. Nickel, which is the same family with platinum, is non-noble metal and has quite good performance for hydrazine oxidation due to its similar structure to platinum. In these aspects, hydrazine fuel cell is further important, not requiring the expensive noble metal. Here, we synthesized Ni nanoparticles via polyol method changing the type of Ni precursor, since chemical, physical, and electro-chemical properties of a metal nanoparticle depend on its morphology and size. When using nickel nitrate, Ni nanoparticle size is smallest with shapeless morphology, whereas using nickel chloride, size is somewhat big but particles are well-spreaded on carbon support. Then, in order to confirm hydrazine electro-oxidation performance, catalyst ink was loaded on the rotating disk electrode (RDE), and cyclic voltammetry (CV) and linear sweep voltammetry (LSV) were carried out.