Electrolyte effect on the catalytic performance of Ni-based catalysts for direct internal reforming molten carbonate fuel cell

Zhenlan Li, Hary Devianto, Sung Pil Yoon, Jonghee Han, Tae Hoon Lim, Ho In Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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/Mg 2SiO4 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 Ni3+ as a decisive factor in keeping catalytic activity from the electrolyte.

Original languageEnglish
Pages (from-to)13041-13047
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number23
DOIs
Publication statusPublished - 2010 Dec

Keywords

  • Electrolyte
  • Molten carbonate fuel cell
  • Ni catalyst
  • Steam reforming

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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