Cost‐Effective Passive Ammonia Fuel Cells via Synergistic Integration of Optimized Membrane Electrode Assembly and Prototype

and an open circuit voltage (OCV) of 0.87 V (outperforming Pt-based PAFCs). Stable discharge can be sustained by the present PAFC for 9 h by replenishing the ammonia supply. This work establishes a prototype-to-performance strategy for cost-effective PAFC, highlighting the potential of non-noble metal catalysts in ammonia electrochemical energy conversion.