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Proton-exchange membrane (PEM) water electrolysis is a promising technology for hydrogen production. Meanwhile, recently, hydrogen water production has attracted great attention owing to the increasing demand in healthcare market. Therefore, hydrogen water production via PEM water electrolysis has also gained much interest. The PEM is the key component dominating the hydrogen production efficiency in the system. Although a Nafion meets the criteria for a number of key physical properties required for the operation in PEM water electrolysis, it is too expensive for commercial applications. In this work, therefore, we have developed the membrane electrode assembly (MEA) prepared with cost-effective pore-filled PEMs via a nonequilibrium impregnation-reduction (I-R) method.
