CPC B01D 53/228 (2013.01) [B01D 67/0069 (2013.01); B01D 69/04 (2013.01); B01D 71/0221 (2022.08); B01D 71/02231 (2022.08); C25D 3/567 (2013.01); C25D 5/34 (2013.01); C25D 7/04 (2013.01)] | 17 Claims |
1. A palladium-gold alloy coated vanadium or vanadium alloy-based gas separation membrane, comprising a palladium-gold alloy coating on a vanadium or vanadium alloy-based gas separation membrane, the coating having a thickness of between 100 nm and 5 microns and having a composition of from Pd60Au40 to Pd95Au5,
wherein the palladium-gold alloy coating has a bulbous and/or cauliflower shaped morphology having a lightness of less than 50, where a lightness of 100 represents the lightest of whites and a lightness of 0 represents the darkest of blacks, measured using a Chroma Meter; and
wherein the palladium-gold alloy coated vanadium or vanadium alloy-based gas separation membrane has a hydrogen permeability of at least 1×10−7 mol/m/s/Pa0.5 at temperatures between 325 to 350° C.
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