Bimetallic nanoparticles consisting of discrete domains of different metals are attractive candidates as advanced functional catalysts. They can integrate several different functionalities in one structure, which may be difficult to accomplish in single-component materials. They may also exhibit novel electrochemical properties at the interfaces or boundary regions of the heteronanostructures. The wet-chemistry approach in a non-hydrolytic system offers good controls over the nucleation and growth of nanoparticles and is a good method in making materials with extended hierarchy. Herein, we present the synthesis of platinum-based heteronanostructures via a sequential process. Platinum nanoparticles were reduced on solid supports through the reduction of Pt acetylacetonate (Pt(acac)2) at elevated temperatures. Long chain amines were used as capping reagents as well as mild reducing reagents. The electrochemical properties of these nanoparticles were characterized. They showed enhanced performances in catalyzing oxygen reduction reaction (ORR), methanol oxidation reaction (MOR) and formic acid oxidation reaction (FAOR) in comparison with pure Pt catalysts. These new heterogeneous systems may have advantages in designing and preparing novel catalysts.