Nowadays, proton exchange membrane fuel cells (PEMFCs) are the most promising green
energy conversion devices for portable and stationary applications. Traditionally, these
devices were based onperfluoro-sulfonic acid electrolytes membranes, given the
commercial name Nafion. Nafion is the mostused electrolyte membrane till now; because of
its high electrochemical properties such as high protonconductivity, good mechanical and
chemical stability at fuel cell conditions, and.... However, its high cost, reducing the …

The need to reduce greenhouse gas emissions dictates the search for new methods and
materials. Here, a novel type of inorganic–organic hybrid materials Fe@ MWCNT-
OH/SPEEK (with a new type of CNT characterized by increased iron content, 5.80 wt%) for
CO2 separation is presented. The introduction of nanofillers into a polymer matrix has
significantly improved hybrid membrane gas transport (D, P, S, and αCO2/N2), and
magnetic, thermal, and mechanical parameters. It was found that magnetic casting has …