(418f) Facile One Pot Synthesis of Palladium-Based Alloy Wavy Nanowires for Hydrogen Separation
Palladium and palladium alloy nanowires (PdM; M= Ag, Cu, Y) of varying composition were synthesized using a facile and scalable one-pot polyol reduction of metallic salts using poly(vinylpyrrolidone) (PVP) as a capping agent. The alloy nanowires with high surface area and interconnected dendritic network structure could provide efficient transport pathways for hydrogen through a membrane. Incorporation of an appropriate amount of a metal like Ag, Cu, or Y can increase the permeability of hydrogen through the metal while reducing the usage of palladium. Mixed-matrix membranes containing the palladium alloy nanowires dispersed in poly(benzimidazole) (PBI) polymer and their separation performance was tested at 150 Ö¯C and 100 psig for separation of hydrogen from a 1:1 mixture of H2 and CO2. Initial test results show increased permeability of H2 up to 52.7 barrer and with pure PBI membrane containing 50 weight percent Pd0.76Ag0.24 alloy nanowires 43.9 barrer as compared to just 25 barrer of pure PBI membrane.