Recent progress in Pd-based composite membranes

Pd-based composite membranes have received great attention from both academia and industry as they exhibit significant potential in several important fields, such as hydrogen purification and small-scale hydrogen generation as well as CO2 capture. Thin and defect-free Pd-based membranes must have high hydrogen flux, strong thermal stability and resistance to poisoning species. This work critically reviews both the experimental and modeling studies of Pd-based composite membranes over the last few decades, particularly focusing on the critical issues of thermal and chemical stability, which are the main obstacles blocking their commercial applications.