Effect of the precursor and reduction methods on the synthesis of supported Pt nanostructures in zeolite mordenite

In this article, the effect of the metal precursor and of the reduction methods in the formation of anisotropic nanostructures using zeolite mordenite as template is explored. Reducing agents in the gas, liquid, and solid phase were studied in some cases at various temperatures. In general, HPtCl(6) has a tendency to form anisotropic Pt structures but on the surface of the zeolite regardless of the reduction method, while Pt(NH(3))(4)(NO(3))(2) lead to diverse Pt nanostructures inside the pores of the zeolite. It was evident that the anisotropy of the platinum nanostructures formed increased following the sequence of Gas < Liquid < Solid. Overall, the formation of Pt nanostructures that include dispersed nanoclusters, nanoparticles, multipods, nanoflowers, and nanowires obtained with the different reduction methods is discussed.