Hard-templating synthesis of macroporous platinum microballs (MPtM)
Journal
Materials Letters
Journal Volume
164
Pages
488-492
Date Issued
2016
Author(s)
Shirai, H.
Huang, Y.-Y.
Yonezawa, T.
Tokunaga, T.
Chang, W.-C.
Alshehri, S.M.
Jiang, B.
Yamauchi, Y.
Wu, K.C.-W.
Abstract
Platinum (Pt) is widely applied for electrochemical catalysis, thus creating porosity in Pt-based materials would enhance their catalytic efficacy. This study demonstrates a new route to synthesize a Pt material with macropores and spherical morphology by the combination of evaporation induced self-assembly of a hard template (i.e., silica nanoparticles) and infiltration/reduction of Pt species in micro-emulsion systems. The synthesized macroporous Pt microballs (denoted as MPtM) are characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), and it is found that MPtM exhibits uniform macropores (diameter of 300 nm) and Pt crystalline framework, which would be potential for enhanced catalytic reactions.
Type
journal article