Density Functional Theory Study of Sulfur Poisoning on Nickel Anode in Solid Oxide Fuel Cells: Effects of Surface and Subsurface Sulfur Atoms
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- Ogura Teppei
- INAMORI Frontier Research Center, Kyushu University International Institute for Carbon-Neutral Research, Kyushu University
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- Ishimoto Takayoshi
- INAMORI Frontier Research Center, Kyushu University
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- Koyama Michihisa
- INAMORI Frontier Research Center, Kyushu University International Institute for Carbon-Neutral Research, Kyushu University
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Impurities such as sulfur compounds cause performance degradation in solid oxide fuel cells (SOFCs). We have studied the sulfur poisoning mechanism on an SOFC nickel anode using density functional theory method, focusing on the effects of surface and subsurface sulfur atoms. The binding energy of surface sulfur atoms decreases with an increase in sulfur coverage on the nickel surface. Subsurface sulfur atoms become stable relative to surface sulfur atoms at high sulfur coverage. A subsurface sulfur phase also appears between sulfur adsorption phase and nickel sulfide phase in the calculated phase diagram for Ni–S systems. Influences of sulfur atoms on intermediate adsorbates during surface reactions are also investigated. Sulfur hinders the reaction by destabilizing the reaction intermediates on the nickel surface.
収録刊行物
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- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
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JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 47 (11), 793-800, 2014
公益社団法人 化学工学会
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詳細情報 詳細情報について
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- CRID
- 1390282679546243840
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- NII論文ID
- 130003361298
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- NII書誌ID
- AA00709658
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- ISSN
- 18811299
- 00219592
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- NDL書誌ID
- 026001431
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可