Fig. 3: Fuel cell performance under H2 and NH3 fuels.
From: Ammonia-fed reversible protonic ceramic fuel cells with Ru-based catalyst

a Fuel-cell polarization under dry H2 fuel; 3% humidified air was used as oxidant gas. b Fuel-cell polarization curves under dry cracked NH3 fuel. Ammonia cracking temperature was 650 °C. The 3% humidified air was used as oxidant gas.