Display options
Share it on

ACS Appl Mater Interfaces. 2015 Apr 08;7(13):7406-12. doi: 10.1021/acsami.5b01048. Epub 2015 Mar 24.

Electrochemical and catalytic properties of Ni/BaCe0.75Y0.25O3-δ anode for direct ammonia-fueled solid oxide fuel cells.

ACS applied materials & interfaces

Jun Yang, Ahmed Fathi Salem Molouk, Takeou Okanishi, Hiroki Muroyama, Toshiaki Matsui, Koichi Eguchi

Affiliations

  1. Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.

PMID: 25804559 DOI: 10.1021/acsami.5b01048

Abstract

In this study, Ni/BaCe0.75Y0.25O3-δ (Ni/BCY25) was investigated as an anode for direct ammonia-fueled solid oxide fuel cells. The catalytic activity of Ni/BCY25 for ammonia decomposition was found to be remarkably higher than Ni/8 mol % Y2O3-ZrO2 and Ni/Ce0.90Gd0.10O1.95. The poisoning effect of water and hydrogen on ammonia decomposition reaction over Ni/BCY25 was evaluated. In addition, an electrolyte-supported SOFC employing BaCe0.90Y0.10O3-δ (BCY10) electrolyte and Ni/BCY25 anode was fabricated, and its electrochemical performance was investigated at 550-650 °C with supply of ammonia and hydrogen fuel gases. The effect of water content in anode gas on the cell performance was also studied. Based on these results, it was concluded that Ni/BCY25 was a promising anode for direct ammonia-fueled SOFCs. An anode-supported single cell denoted as Ni/BCY25|BCY10|Sm0.5Sr0.5CoO3-δ was also fabricated, and maximum powder density of 216 and 165 mW cm(-2) was achieved at 650 and 600 °C, for ammonia fuel, respectively.

Keywords: ammonia decomposition; ammonia fuel; gadolinium-doped ceria; proton-conducting oxide; solid oxide fuel cells; yttria-stabilized zirconia; yttrium-doped barium cerate

Publication Types