Hydrogen, seen as a sustainable energy source, is crucial for the future energy landscape. Water electrolysis for 'green hydrogen' production faces challenges due to high energy consumption from the oxygen evolution reaction. A shift towards organics oxidation reactions (OOR) coupled with hydrogen evolution shows promise in reducing energy consumption and producing valuable chemicals. Recent research focusing on low-potential aldehyde oxidation (LP-AOR) on copper-based catalysts indicates a path to lower anodic reaction potential and enhance green hydrogen production. Investigations into Cu catalyst deactivation during LP-AOR led to the development of a stable PdCu catalyst that improves catalytic stability through an inactivation and reactivation loop. The PdCu catalyst, validated by in-situ Raman and multi-potential electrolysis, demonstrates enhanced performance in catalyzing LP-AOR. This advancement enables the assembly of a hydrogen production device achieving high current density at a low cell voltage, marking progress in efficient green hydrogen production.