Abstract

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.

• Keywords: Liquid phase reduction process;Platinum nano particle;Metal salt;Shape control;