Platinum Metals Rev., 1999, 43, (2), 61
Porous Platinum Nanofibres
A new way to produce nanostructures replicating the structure and shape of a base has been developed by researchers from Toyota Central R&D Labs in Japan. They synthesised platinum (Pt) fibres, reproducing the porous structure and fibrous shape of an activated carbon-fibre (C) base (H. Wakayama and Y. Fukushima, Chem. Commun ., 1999, (4), 391-392).
The Pt precursor, Pt(acac)2, and acetone were placed in a vessel with activated C fibres and pressurised under supercritical carbon dioxide. The Pt precursor dissolves, and is adsorbed onto the C. Oxidation then removes the C and reduces Pt(acac), to Pt metal, which sinters, Thus control of nanostuctural shape has been achieved and porous Pt fibres of high-surface area with potential catalytic use have been made.