Development of a direct ammonia-fueled molten hydroxide fuel cell

作者：Yang Jun; Muroyama Hiroki; Matsui Toshiaki; Eguchi Koichi^*

来源：Journal of Power Sources, 2014, 245: 277-282.

DOI：10.1016/j.jpowsour.2013.06.143

• Direct ammonia fuel cells
• Molten hydroxides
• Ammonia oxidation
• Platinum electrode
• Gas diffusion electrode

A fundamental study on direct ammonia fuel cells with a molten hydroxide electrolyte was conducted. The electrochemical oxidation of ammonia on Pt electrode in a molten NaOH-KOH electrolyte was investigated by cyclic voltammetry and mass spectrometry. Ammonia was proved to be oxidized to N-2 on the Pt electrode during anodic polarization in the molten hydroxide electrolyte. Furthermore, the direct ammonia fuel cell, i.e., Pt gas diffusion electrodelmolten NaOH-KOH electrolyte vertical bar Pt gas diffusion electrode, was assembled and operated at 200-220 degrees C. The cell achieved the maximum power density of ca. 16 mW cm(-2) at 220 degrees C with the supply of NH3 and humidified O-2 to the anode and cathode, respectively. The mechanism of ammonia oxidation over Pt electrodes in a molten hydroxide electrolyte was discussed based on the results obtained.

• 出版日期2014-1-1