This research on the production of hydrogen gas using Proton Exchange Membrane (PEM) water electrolysis method with and without Microporous Layer (MPL) utilizing Cu2O/C catalyst on both cathode and anode sides, as well as Nafion-212 membrane. The Membrane Electrode Assembly (MEA) consists of a Nafion membrane sandwiched between two electrodes (cathode and anode) placed in the electrolyzer stack…