Abstract
The morphology of cyanide-bridged palladium−cobalt (Pd−Co) gels, synthesized from aqueous solutions of Na2PdCl4 and K3[Co(CN)6], is elucidated using nitrogen and carbon dioxide adsorption, permeability measurements, electron microscopy, and small-angle X-ray scattering. The aerogels formed from the Pd−Co hydrogels possess both micro- and mesoporosity. Electron microscopy indicates that the aerogels are constituted of spherical microporous particles; the interstices between these particles constitute the mesopores. The aerogel surfaces are found to be fractal as analyzed by gas adsorption and small-angle X-ray scattering. Both these techniques yield, within experimental error, the same surface fractal dimension of 2.6 ± 0.2 for the aerogels. The Pd−Co xerogels, unlike the aerogels, are predominantly microporous with a narrow microporosity. Transmission electron microscopy reveals that the xerogels are constituted of particles of an average size of ∼10 nm. Unlike the aerogels, the xerogels do not possess su...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
