Degradation of Pd/Nb30Ti35Co35/Pd hydrogen permeable membrane: A numerical description

Abstract

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Improved High-Temperature Stability and Hydrogen Penetration through a Pd/Ta Composite Membrane with a TaTiNbZr Intermediate Layer

“…The EDS spectrum in Figure 3f scanned the distribution of Pd elements; only the surface had a high Pd content, and there was no Pd element inside the sample. In the reported Pd/NbTiCo/Pd film, Pd diffused significantly into the substrate after annealing at 600 °C [11,29]. This shows that TaTiNbZr barrier layers can effectively prevent Pd diffusion.…”

“…After annealing, the multi-layer structure remains intact, the interlayer interface is clear, and the structure is stable. The Pd/NbTiCo/Pd prepared by Xiao et al formed a boundary layer between the Pd layer and Nb30Ti35Co35 substrate after annealing at high temperatures, which contributes to the fast declination of hydrogen flux from the beginning of the permeation process [11,29]. This indicates that after annealing at 600 • C for 24 h, the TaTiNbZr barrier layer with a thickness of 50 nm can effectively prevent the interdiffusion of Pd and Ta.…”

“…Therefore, the development of new ultrathin films with good mechanical properties is the main goal of many researchers in this field. This goal is usually achieved by incorporating a thin Pd layer on the surface of the alloy [3][4][5][6][11][12][13][14][15]. Group V transition metals theoretically have a higher permeability to hydrogen atoms than Pd, a feature that has been experimentally demonstrated in a number of systems [4].…”