Selected paper and featured on the cover of

The following is an abstract from an article co-authored by Arash Badakhsh, R&D engineer and hydrogen specialist at PNDC. Learn more about Arash in our Meet the Team feature.


Hydrogen can be used as fuel in a fuel cell to generate electricity and/or in a burner to produce heat with no carbon emissions. However, pure hydrogen is rarely found in nature and is generally produced from other sources, such as water and/or methane. Hence, part of the process to produce pure hydrogen is the separation from other species like oxygen, carbon dioxide or water vapour. The state-of-the-art, i.e., PSA, uses gigantic columns filled with adsorbents to separate heavier gases from hydrogen by applying high pressure (10-40 bar). This renders PSA highly energy-consuming and space-occupying.

Catalytic membranes are being developed as an alternative to alleviate these problems and lower the required pressure and volume and, in turn, the required energy. In this paper, Arash and his team have investigated the facile synthesis and permeability performance of an alloy membrane system, which offers a lower price and longer durability against decay by thermal, chemical, and mechanical loads.

Graphical abstract of dissociation mechanism of the hydrogen molecule and comparative stability of membranes

Read the full article at

Ryu, S.; Badakhsh, A.; Oh, J.G.; Ham, H.C.; Sohn, H.; Yoon, S.P.; Choi, S.H. Experimental and Numerical Study of Pd/Ta and PdCu/Ta Composites for Thermocatalytic Hydrogen Permeation. Membranes 2023, 13, 23.