Hydrogen permeation characteristics of V-15Ni membrane with Pd/Ag overlayer by sputtering

Dense inorganic membranes for production of hydrogen from methane and coal with carbon dioxide sequestration

“…Common methods for deposition of palladium-silver alloys include sputtering [19][20][21], electroless deposition [22,23], and vapor deposition [24]. At Eltron Research Inc. palladium-silver alloy catalysts are prepared by vapor deposition of alternating layers of palladium and silver followed by interdiffusion.…”

“…Oxygen vacancies in the bulk crystal lattice of perovskites containing metal ions with formal charges of 3 + , for example, are increased by doping with metal ions possessing lower www.elsevier.com/locate/cattod Catalysis Today 118 (2006) [12][13][14][15][16][17][18][19][20][21][22][23] formal charges of 2 + . The net lower total positive charge of the cations in the lattice requires less oxygen of formal charge 2 À needed for charge balance.…”

Effect of elements addition on hydrogen permeability and ductility of Nb40Ti18Zr12Ni30 alloy

“…Therefore, it is desirable to develop a new low-cost membrane by minimum addition or absence of Pd with high hydrogen permeability (Φ), ductility and resistance to the hydrogen embrittlement. In recent years, researchers have investigated the V-based [3][4][5], Nb-Ti-Ni (or Co) [6,7] and some amorphous alloy membranes [8][9][10] and resistance to the hydrogen embrittlement [11]. However, hydrogen permeation could not be measured due to the hydrogen embrittlement if the thickness of this alloy membrane is lower than 0.3 mm.…”

Preparation and characterization of Pd–Cu/V–15Ni composite membrane for hydrogen permeation

“…However, V-15Ni membrane is easy to oxidize and not active to hydrogen molecule dissociation, deposition a thin overlayer of Pd or Pd-Ag alloys on V-15Ni to form a composite membrane is proved to be a good solution, and the cost of these composite membranes is greatly reduced than that of pure Pd or Pd-Ag alloys. Zhang [11][12][13] and Ozaki et al [14,15] did a lot of works on Pd/V-15Ni and Pd-Ag/V-15Ni composite membranes and higher hydrogen permeability than pure Pd and Pd-Ag alloy membranes was obtained. In comparison with Pd and Pd-Ag alloys, Pd-Cu alloys (wt.% Pd > 60) membranes have similar hydrogen permeability [16], it is cheaper that Pd and Pd-Ag alloys, furthermore, they shows better resistance to poisoning and deactivation by H 2 S, the most common impurity in hydrogen mixed gas [17,18].…”