Polymeric architectures (PAs) for H2 capture: A review on the mechanism, synthesis approach, and physicochemical traits

•Techniques and mechanisms involving H2 capturing via adsorption and separation.•Polymeric membranes, POF, and sieves can be utilized for H2 capturing.•Blended PBI shows a 4–9 folds increment in permeability of H2.•Benzene-derived HCP with an H2 intake ∼3.68 wt%, is a viable commercial option.•The functionalization of CMSM will enhance the permeability of H2 by up to ∼40 %.