Shape-controtled growth of platinum nanoparticles

The synthesis of platinum nanoparticles of varying shape and size through the control of simple variables is discussed. The shape and morphology of platinum nanocrystals have been found to be highly dependent on several variables including reaction temperature, concentration, and time. Platinum acetylacetonate could be decomposed under a mild hydrogen pressure to form platinum rods, tripods, extended tripods, octapods, polypods, cubes, and uniform triangular prisms through control of these reactions conditions. The different particle morphologies obtained could be understood by consideration of nucleation and growth of the particles and HRTEM images. The design and synthesis of controlled shapes and sizes of platinum nanoparticles is critical for the future application of these nanocrystals as catalysts. These results and further understanding of shape control for platinum can also lead to strategies for the shape control of nanocrystals in other fcc systems.