Electrolyte effect on the catalytic performance of Ni-based catalysts for direct internal reforming molten carbonate fuel cell
- Electrolyte effect on the catalytic performance of Ni-based catalysts for direct internal reforming molten carbonate fuel cell
- ZhenLan Li; Hary Devianto; 윤성필; 한종희; 임태훈; 이호인
- Molten carbonate fuel cell; Steam reforming; Ni catalyst; Electrolyte
- Issue Date
- International journal of hydrogen energy
- VOL 35, NO 23, 13041-13047
- An active and tolerant Ni-based catalyst for methane steam reforming in direct internal
reforming molten carbonate fuel cells (DIR-MCFCs) was developed. Deactivation of
reforming catalysts by alkali metals from the electrolyte composed of Li2CO3 and K2CO3 is
one of the major obstacles to be overcome in commercialization of DIR-MCFCs. Newly
developed Ni/MgSiO3 and Ni/Mg2SiO4 reforming catalysts show activities of ca. 80%
methane conversion. Subsequent to electrolyte addition to the catalyst, however, the
activity of Ni/Mg2SiO4 decreases to ca. 50% of its initial value, whereas Ni/MgSiO3 catalyst
retains its initial activity. Results obtained from temperature-programmed reduction and
X-ray photoelectron spectroscopy identify unreduced Ni3þ as a decisive factor in keeping
catalytic activity from the electrolyte.
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