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

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    64 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 Sept 22

    Bibliographical note

    Copyright:
    Copyright 2008 Elsevier B.V., All rights reserved.

    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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