In this study, a PtPdCu catalyst for formic acid oxidation was synthesized through a one-pot synthesis method. The PtPdCu nanoparticles with truncated-octahedral morphology were obtained by reducing Pt(acac)(2), Pd(acac)(2) and Cu(acac)(2) in ethylene glycol solution under the effects of PVP and KBr. To determine the electrocatalytic performance of the PtPdCu nanoparticles with truncated-octahedral morphology, cyclic voltammetry was carried out in solutions of 0.5M H2SO4 and 0.5M H2SO4 containing 1M HCOOH. According to the electrochemical results, the PtPdCu nanoparaticles possessed higher activity and stability toward the oxidation of formic acid than commercial Pt black due to the addition of Cu and Pd elements. [GRAPHICS] .