“…For example, Pt-based multicomponent nanoparticles have been extensively utilized in the chemical industry. , Pt presents remarkable catalytic activity, which may be further enhanced by the addition of another metallic component such as Au or Pd. − Many studies focusing on bimetallic systems of these three elements (especially segregated systems with core@shell configurations) indicate a drastic enhancement of catalytic activity in various reactions and excellent electrochemical properties in general. − It was, therefore, expected that a suitable combination of these three noble metals would favorably modify the electronic structure of the nanoparticles and provide more active sites for enhanced catalytic activity. − Various studies focused on the Au–Pt–Pd system developed by some chemical route: by typical reduction of precursors and adjustment of decomposition kinetics to form multishell particles, , sol-immobilization, , fabrication from a poly(vinylpyrrolidone)-based aqueous solution, electroless deposition, etc. These syntheses enabled the formation of spherical, multishell Au@Pd@Pt nanoparticles, nanoalloys, Au@Pd@Pt nanocubes, or even interesting trimetallic “nanoflowers” . Experimental studies clearly demonstrated these trimetallic clusters’ improved chemical stability for fuel cell reactions , and impressive catalytic activity for the methanol oxidation reaction, ,,, glucose oxidation, selective oxidation of benzyl alcohol, formic acid electro-oxidation, electrochemical performance for oxygen reduction reaction, , etc.…”