Ammonia-fed reversible protonic ceramic fuel cells with Ru-based catalyst.

ABSTRACT: The intermediate operating temperatures (~400-600 °C) of reversible protonic ceramic fuel cells (RePCFC) permit the potential use of ammonia as a carbon-neutral high energy density fuel and energy storage medium. Here we show fabrication of anode-supported RePCFC with an ultra-dense (~100%) and thin (4 μm) protonic ceramic electrolyte layer. When coupled to a novel Ru-(BaO)₂(CaO)(Al₂O₃) (Ru-B2CA) reversible ammonia catalyst, maximum fuel-cell power generation reaches 877 mW cm^-2 at 650 °C under ammonia fuel. We report relatively stable operation at 600 °C for up to 1250 h under ammonia fuel. In fuel production mode, ammonia rates exceed 1.2 × 10^-8 NH₃ mol cm^-2 s^-1at ambient pressure with H₂ f

SUBMITTER: Zhu L 

PROVIDER: S-EPMC9814555 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature