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

doi:10.1016/j.jpowsour.2005.11.092

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 journal › Article › peer-review

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 language	English
Pages (from-to)	1147-1152
Number of pages	6
Journal	Journal of Power Sources
Volume	159
Issue number	2
DOIs	https://doi.org/10.1016/j.jpowsour.2005.11.092
Publication status	Published - 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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2005.11.092

Cite this

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title = "The effect of a ceria coating on the H2S tolerance of a molten carbonate fuel cell",

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.",

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AU - Devianto, Hary

AU - Yoon, Sung Pil

AU - Nam, Suk Woo

AU - Han, Jonghee

AU - Lim, Tae Hoon

PY - 2006/9/22

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N2 - 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.

AB - 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.

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