This paper presents the synthesis and characterization of aluminum, cobalt, and molybdenum (Al-Co-Mo) nanocomposites for various applications in materials science and catalysts. The Al-Co-Mo nanoparticles were prepared using the salt synthesis method, which ensured their high stability and homogeneity. The main physicochemical properties of the nanocomposite, such as particle size, morphology, elemental composition, and their distribution at the microlevel, are investigated in this work. Scanning electron microscopy (SEM), infrared spectroscopy (IR), and elemental analysis (EDX) were used for the analysis. SEM studies showed that the obtained nanoparticles have a spherical or oval shape with a size of about 60–80 nm and are uniformly distributed over the sample, with little particle aggregation. IR spectroscopy confirmed the presence of oxide bonds between the metals, and elemental analysis showed the correct ratio of aluminum, cobalt, and molybdenum in the nanocomposite. The use of such nanomaterials as catalysts and in electronics promises significant advantages due to their high activity, stability and potential for further functionalization. The work provides important data for the development of new efficient materials with improved catalytic properties and potential in various fields, including energy technologies and ecology.