A palladium composite membrane was prepared via electroless plating technique using organic-inorganic method during activation process. The ceramic support surface was modified by two TiO2-boehmite and one γ-alumina layers to avoid Pd penetration in support pores. Thin and defect-free Pd composite membrane was obtained by creating a relative smoothness on the ceramic support and using Pd nanopa...

High-purity hydrogen continues to receive attention as a promising energy source for fuel cells in portable power applications. On-demand hydrogen generation via fuel reforming offers a convenient alternative to hydrogen storage, but the concomitant CO generation is deleterious to the fuel cell catalyst. Of the possible hydrogen purification options, palladium membranes allow a compact design s...

A new approach to enhancing proton conductivity of ceramics is demonstrated by aligning proton conductive pathways and eliminating resistive grain boundaries. Hydroxyapatite (HAP) membranes are synthesized by multistage crystallization onto palladium. The synthesis involves three steps: electrochemical deposition of HAP seeds, secondary hydrothermal crystallization onto the seed layer to promot...

B.D. Morreale, M.V. Ciocco, K.S. Rothenberger, B.H. Howard, A.V. Cugini, R.M. Enick Considerable interest in hydrogen separation and membrane reactors has motivated the research and development of hydrogen permeable materials. One particular interest in membrane technology is the application to processes that can benefit from operation at elevated temperatures (up to 1173 K) and pressures (up t...

Thin Pd–40%Cu films were obtained via the classical melting and rolling method, magnetron sputtering, modified with nanostructured functional coatings to intensify process of hydrogen transportation. The by electrodeposition, according method obtaining palladium black “Pd–Au nanoflowers” spherical pentagonal particles, respectively. experiment results demonstrated highest catalytic activity (89...

The present work is focused on the investigation of the performance and long-term stability of two composite palladium membranes under different operating conditions. One membrane (Pd/porous stainless steel (PSS)) is characterized by a ~10 µm-thick palladium layer on a porous stainless steel substrate, which is pretreated by means of surface modification and oxidation; the other membrane (Pd/Al...

This paper focused on a novel method of electroless plating ruthenium (Ru) on solid or porous substrates like porous stainless steel (PSS) discs or ceramic tubes. A novel complexing plating bath of Ru was developed. It is proven that Ru can be deposited directly on these substrates by the bath at a temperature of 328 K and strong alkaline environment. TGA, SEM, EDX and XRD confirmed the success...