PdAu membranes supported on top of vacuum-assisted ZrO2-modified

ANA TARDITI,CAMILA GERBONI,LAURA CORNAGLIA

JOURNAL OF MEMBRANE SCIENCE

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2013 vol. 428 p. 1 - 10

0376-7388

To enable the formation of defect-free PdAu composites by electroless plating, the vacuum-assisted ZrO2-modified method was optimized on top of porous stainless steel disks. Both the ZrO2-modified supports and the PdAu synthesized membranes were characterized by XRD (X-ray diffraction), SEM (Scanning Electron Microscopy), EDS (Energy Dispersive X-ray analysis) and XPS (X-ray photoelectron spectroscopy). SEM cross-section results showed that dense, continuous, defect-free PdAu films were deposited on top of the ZrO2-modified PSS disks, and the EDS data indicated that no significant concentration gradient was present on the thickness. At 400 °C and 100 kPa, the pure hydrogen permeation flux for a 10 mm thick PdAu membrane was about 0.14 mol s-1 m-2 and the H2/N2 ideal selectivity was higher than 10,000.