Enhancing Alkaline Water Electrolysis Performance with Magnetic Field Assistance

Green hydrogen from water electrolysis is pivotal for decarbonizing hard-to-electrify sectors and, as a core energy carrier in Power-to-X (PtX) system, for buffering variability in renewable electricity. However, alkaline water electrolysis (AWE) suffers efficiency penalties from bubble-induced polarization and sluggish dynamic response, elevating energy demand and levelized cost of hydrogen. This project advances a magneto-electrochemical strategy that applies magnetic-field assistance to accelerate bubble detachment, increase the accessible active area, and lower overpotential under dynamic operation. A microstructured electrode with built-in magnetic functionality will be engineered and a lab-scale AWE prototype validated, targeting a 20–40% gain in H₂ production efficiency. The anticipated improvements will reduce cost and enable responsive PtX integration, strengthening Denmark’s leadership in green energy and contributing to a faster global transition to a low-carbon system.