Shape Control of Platinum Nanoparticles Using a Metal Salt

AgNO 3 has the characteristic is controlling the inhibition or promotion of particle growth by adsorbing onto specific facets of platinum nanoparticles. Therefore, in this study, AgNO 3 was added to control the shape of platinum nanoparticles during the liquid phase reduction process. Consequently, platinum cubes were synthesized when AgNO 3 of 1.1 mol% (with respect to the Pt concentration) was added into the solution. Platinum octahedrons were synthesized when 32 mol% (with respect to the Pt concentration) was added into the solution. These results demonstrate that the metal salt AgNO 3 , effectively controlled the relative growth rates of each facet of Pt nano particles.