The effect of a ceria coating on the H2S tolerance of a molten carbonate fuel cell

Hary Devianto, Sung Pil Yoon, Suk Woo Nam, Jonghee Han, Tae Hoon Lim

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)

Abstract

To enhance the performance of anodes in molten carbonate fuel cells (MCFCs), in terms of their sulfur tolerance, we modified the surface characteristics of a conventional Ni-10 wt% Cr anode through dip coating using a ceria sol. The performance of the ceria-coated anode was 0.4 V higher than that of the uncoated anode when H2S (80 ppm) was introduced under a current density of 150 mA cm-2 for 180 h. H2S acted as a poison of the non-modified Ni electrode, regardless of its operating conditions, to form Ni3S2, which caused the voltage drop. The ceria-coated anode had the ability to suppress such a voltage drop because ceria can react with H2S to form Ce2O2S. Our results suggest that the presence of a CeO2 coating layer can reduce the degree of sulfur poisoning of the anode under the operating conditions - e.g., a reducing atmosphere and a high temperature - experienced by MCFCs.

Original languageEnglish
Pages (from-to)1147-1152
Number of pages6
JournalJournal of Power Sources
Volume159
Issue number2
DOIs
Publication statusPublished - 2006 Sep 22

Keywords

  • Anode
  • Ceria
  • MCFC
  • Sulfur
  • Surface modification
  • Wettability

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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