钯铂合金二十四面体的制备及其催化性能研究

Platinum-group metal nanomatrrials are widely used as catalysts applied in fuel cells,petrochemical industrial and other important fields. The key scientific and technological issue of platinum is to further improve their activity,stability and utilization efficiency. Fundamental studies of single-crystal model catalysts have demonstated that high-index planes of platinum-group metals exhibit planes,such as (111),(100),and even(110),because the high-index planes have a high density of atomic steps,ledges,and kinks,which usually serve as active sites for breaking chemical bonds. In this paper,THH Pd-Pt alloy nanocrystals are cucessfully synthesized by applying an electrochemical square-wave potential method.The catalysts show high activity towards formic acid electrooxidation.