中温H2S-空气燃料电池阴极催化剂的研究

CIESC Journal

• REACTION KINETICS, CATALYSIS • 下一篇

中温H₂S-空气燃料电池阴极催化剂的研究

钟理^a; 罗京莉^b; K.Chuang^b

^aCollege of Chemical and Energy Engineering, South China University of Technology,
Guangzhou 510640, China
^b Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G
2G6, Canada

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-06-28 发布日期:2007-06-28
通讯作者: 钟理

Investigation of Cathode Catalysts for Intermediate-temperature
H₂S-Air Fuel Cells

ZHONG Li^a; LUO Jingli^b; K.Chuang^b

^a College of Chemical and Energy Engineering, South China University of Technology,
Guangzhou 510640, China
^b Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G
2G6, Canada

Received:1900-01-01 Revised:1900-01-01 Online:2007-06-28 Published:2007-06-28
Contact: ZHONG Li

摘要/Abstract

摘要： Cathode catalysts comprising composite NiO, NiO-Pt, or LiNiO2 have been developed for electrochemical oxidation of hydrogen sulfide in intermediate-temperature solid oxide fuel cells (ITSOFCs). All catalysts exhibited good electrical conductivity and catalytic activity at operating temperature. Composite NiO catalysts were found to be more active and have lower over potential and higher current density than pure Pt although the electrical conductivity of NiO itself is lower than that of Pt. This problem has been overcome by either admixing as high as 10% (by mass) Ag powder into NiO cathode layer or using composite NiO catalysts such as NiO-Pt and LiNiO2 catalysts. Composite catalysts like NiO with Ag, electrolyte and starch admixed, NiO-Pt, which was prepared from a mixture of NiO and Pt powders, by admixing electrolyte and starch, and LiNiO2, which is derived from the reac-tion of LiOH?H2O and NiO with electrolyte and starch admixed have been shown to be feasible and effective in an intermediate-temperature H2S-air fuel cell. A fuel cell using Li2SO4-based proton-conducting membrane as electro-lyte, metal sulfides as anode catalysts, and composite NiO as cathode catalysts produced a maximum current density about 300mA?cm－2 and maximum power density over 80 mW?cm－2 at 680℃.

关键词: cathode;catalyst;fuel cell;hydrogen sulfide

Abstract:

Cathode catalysts comprising composite NiO, NiO-Pt, or LiNiO2 have been developed for electrochemical oxidation of hydrogen sulfide in intermediate-temperature solid oxide fuel cells (ITSOFCs). All catalysts exhibited good electrical conductivity and catalytic activity at operating temperature. Composite NiO catalysts were found to be more active and have lower over potential and higher current density than pure Pt although the electrical conductivity of NiO itself is lower than that of Pt. This problem has been overcome by either admixing as high as 10% (by mass) Ag powder into NiO cathode layer or using composite NiO catalysts such as NiO-Pt and LiNiO2 catalysts. Composite catalysts like NiO with Ag, electrolyte and starch admixed, NiO-Pt, which was prepared from a mixture of NiO and Pt powders, by admixing electrolyte and starch, and LiNiO2, which is derived from the reac-tion of LiOH?H2O and NiO with electrolyte and starch admixed have been shown to be feasible and effective in an intermediate-temperature H2S-air fuel cell. A fuel cell using Li2SO4-based proton-conducting membrane as electro-lyte, metal sulfides as anode catalysts, and composite NiO as cathode catalysts produced a maximum current density about 300mA?cm－2 and maximum power density over 80 mW?cm－2 at 680℃.

Key words: cathode, catalyst, fuel cell, hydrogen sulfide

钟理, 罗京莉, K.Chuang. 中温H₂S-空气燃料电池阴极催化剂的研究[J]. CIESC Journal.

ZHONG Li, LUO Jingli, K.Chuang. Investigation of Cathode Catalysts for Intermediate-temperature
H₂S-Air Fuel Cells
[J]. .

参考文献

1 Pujare, N.U., Semkow, K.W., Sammells, A.F., “A direct H2S/air solid oxide fuel
cell”, J. Electrochem. Soc., 134(10), 2639—2640 (1987).
2 Liu, M., He, P., Luo, J.L., Sanger, A.R., Chuang, K., “Per-formance of a solid
oxide fuel cell utilizing hydrogen sul-fide as fuel”, J. Power Sources, 94, 20—25(2001).
3 Pujare, N.U., Tsai, K.J., Sammells, A.F., “An electro-chemical Claus process for
sulfur recovery”, J. Electro-chem. Soc., 136(12), 3662—3679(1989).
4 Zhu, B., Lai, Z.H., Mellander, B.E., “Structure and ionic conductivity of lithium
sulphate-aluminum oxide ceram-ics”, Solid State Ionics, 70/71, 125—129(1994).
5 Peterson, D., Winnick, J., “Utilization of hydrogen sulfide in an intermediate-
temperature ceria-based solid oxide fuel cell”, J. Electrochem. Soc., 145(5), 1449—1453
(1998).
6 Zhong, L., Zhang, T.Y., Chen, J.J., Wei, G.L., Luo, J.L., Chuang, K., “Effect of
H2S flow rate and concentration on performance of H2S air solid oxide fuel cell”, Chin. J.
Chem. Eng., 12(2), 306—309(2004).
7 Zhong, L., Liu, M., Wei, G.L., Luo, J.L., Chuang, K., “In-fluence of metal
sulfides as anode catalysts on performance of H2S SOFC”, Chin. J. Chem. Eng., 11(3), 245—
248(2003).
8 Wei, G.L., Luo, J.L., Sanger, A.R., Chuang, K., “High-performance anode for H2S-
air SOFCS”, J. Elec-trochem. Soc., 151(2), A232—A237(2004).
9 Zhong, L., Qi, M., Wei, G.L., Luo, J.L., Chuang, K., “An intermediate-temperature
H2S fuel cell with a Li2SO4-based proton-conducting membrane”, Chin. J. Chem. Eng., 14(1),
51—55(2006).
10 Zhong, L., Zhang, T.Y., Wei, G.L., Luo, J.L., Chuang, K., “Performance of cell and
proton-conducting membranes used in a hydrogen sulfide fuel cell”, J. Chem. Eng. Chin.
Univ., 18(2), 208—211(2004). (in Chinese)
11 He, P., Liu, M., Luo, J.L., Sanger, A.R., Chuang, K., “Stabilization of platinum
anode catalyst in a H2S-O2 solid oxide fuel cell with an intermediate TiO2 layer”, J.
Electrochem. Soc., 149(7), A808—A814(2002).

中温H₂S-空气燃料电池阴极催化剂的研究

Investigation of Cathode Catalysts for Intermediate-temperature
H₂S-Air Fuel Cells

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价