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

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...

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Detalles Bibliográficos
Autores principales: Zhu, Liangzhu, Cadigan, Chris, Duan, Chuancheng, Huang, Jake, Bian, Liuzhen, Le, Long, Hernandez, Carolina H., Avance, Victoria, O’Hayre, Ryan, Sullivan, Neal P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9814555/
https://www.ncbi.nlm.nih.gov/pubmed/36697696
http://dx.doi.org/10.1038/s42004-021-00559-2
Descripción
Sumario: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)(Al(2)O(3)) (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) NH(3) mol cm(−2) s(−1)at ambient pressure with H(2) from electrolysis only, and 2.1 × 10(−6) mol NH(3) cm(−2) s(−1) at 12.5 bar with H(2) from both electrolysis and simulated recycling gas.

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