Influence of Metal Sulfides as Anode Catalysts on Performance of H2S SOFC

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Influence of Metal Sulfides as Anode Catalysts on Performance of H₂S SOFC

ZHONG Li^a; LIU Man^b; WEI Guolin^b; CHUANG Karl^b

a College of Chemical Engineering, South China University of Technology, Guangzhou 510640,
China
b Department of Chemical and Materials Engineering, University of Alberta, Edmonton,
Alberta, Canada

Received:1900-01-01 Revised:1900-01-01 Online:2003-06-28 Published:2003-06-28
Contact: ZHONG Li

金属硫化物作为阳极材料对H₂S固体氧化物燃料电池性能研究

钟理^a; 刘曼^b; 韦国林^b; CHUANG Karl^b

^a College of Chemical Engineering, South China University of Technology, Guangzhou 510640,
China
^b Department of Chemical and Materials Engineering, University of Alberta, Edmonton,
Alberta, Canada

通讯作者: 钟理

Abstract

Abstract: Two anode catalysts with Pt, MoS2 and composite metal sulfides (MoS2+NiS), are investigated
forelectrochemical oxidation of hydrogen sulfide in solid oxide fuel cell (SOFC) at
temperatures 750-850℃. Thecatalysts comprising MoS2 and MoS2+NiS exhibited good electrical
conductivity and catalytic activity. MoS2 andcomposite catalysts were found to be more
active than Pt, a widely used catalyst for high temperature H2S/O2fuel cell at 750-850℃.
However, MoS2 itself sublimes above 450℃. In contrast, composite catalysts containingboth
Mo and transition metal (Ni) are shown to be stable and effective in promoting the
oxidation of H2S in SOFCup to 850℃. However, electric contact is poor between the platinum
current collecting layer and the compositemetal sulfide layer, so that the cell performance
becomes worse. This problem is overcome by adding conductiveAg powder into the anode layer
(forming MoS2+NiS+Ag anode material) to increase anode electrical conductanceinstead of
applying a thin layer of platinum on the top of anode.

Key words: solid oxide fuel cell (SOFC), hydrogen sulfide, metal sulfide, anode

摘要： Two anode catalysts with Pt, MoS2 and composite metal sulfides (MoS2+NiS), are investigated
forelectrochemical oxidation of hydrogen sulfide in solid oxide fuel cell (SOFC) at
temperatures 750-850℃. Thecatalysts comprising MoS2 and MoS2+NiS exhibited good electrical
conductivity and catalytic activity. MoS2 andcomposite catalysts were found to be more
active than Pt, a widely used catalyst for high temperature H2S/O2fuel cell at 750-850℃.
However, MoS2 itself sublimes above 450℃. In contrast, composite catalysts containingboth
Mo and transition metal (Ni) are shown to be stable and effective in promoting the
oxidation of H2S in SOFCup to 850℃. However, electric contact is poor between the platinum
current collecting layer and the compositemetal sulfide layer, so that the cell performance
becomes worse. This problem is overcome by adding conductiveAg powder into the anode layer
(forming MoS2+NiS+Ag anode material) to increase anode electrical conductanceinstead of
applying a thin layer of platinum on the top of anode.

关键词: solid oxide fuel cell (SOFC);hydrogen sulfide;metal sulfide;anode

ZHONG Li, LIU Man, WEI Guolin, CHUANG Karl. Influence of Metal Sulfides as Anode Catalysts on Performance of H₂S SOFC[J]. .

钟理, 刘曼, 韦国林, CHUANG Karl. 金属硫化物作为阳极材料对H₂S固体氧化物燃料电池性能研究[J]. CIESC Journal.

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Influence of Metal Sulfides as Anode Catalysts on Performance of H₂S SOFC

金属硫化物作为阳极材料对H₂S固体氧化物燃料电池性能研究

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