Magnetically modified electrocatalysts for oxygen evolution reaction in proton exchange membrane (PEM) water electrolyzers

Green hydrogen production can only be realized via water electrolysis using renewable energy sources. Proton exchange membrane electrolyzers have been demonstrated as the technology of choice for mass green due to their scalability and potential high efficiency. However, is still relatively expensive catalyst materials cost operational limitations transfer activation polarizations. During oxygen evolution reaction, bubbles stick electrode surface this causes a low reaction rate losses. In study, commonly used electrocatalyst reactions; IrO2, modified by introducing magnetic Fe3O4 achieve greater bubble separation at anode during operation. The prepared composite catalysts were characterized Scanning Electron Microscope, Energy Dispersive X-Ray Analysis, Powder Diffraction, X-ray photoelectron spectroscopy Brunauer–Emmett–Teller characterization methods. samples are magnetized investigate field effect on performance in proton electrolyzers. 90% IrO2 - 10% 80% 20% tested linear sweep voltammetry both ex-situ in-situ electrolyzer single cell. According tests, magnetization sample resulted 15% increase maximum current density. Moreover, cell test showed four-fold density employing catalyst.