期刊
JOURNAL OF POWER SOURCES
卷 196, 期 15, 页码 6177-6185出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2011.03.018
关键词
Solid oxide fuel cells; Nicke /ceria-zirconia; Ethanol steam reforming; Carbon deposition; Hydrogen production; Catalyst layer
资金
- National Science Foundation for Distinguished Young Scholars of China [51025209]
- NSFC-Guangdong [U0834004]
- Outstanding Young Scholar Grant at Jiangsu Province [2008023]
- program for New Century Excellent Talents
- Fok Ying Tung Education Foundation [111073]
Inexpensive 20 wt.% Ni-Ce0.8Zr0.2O2 catalysts are synthesized by a glycine nitrate process (GNP) and an impregnation process (IMP). The catalytic activity for ethanol steam reforming (ESR) at 400-650 degrees C, catalytic stability and carbon deposition properties are investigated. Ni-Ce0.8Zr0.2O2 (GNP) shows a higher catalytic performance than Ni-Ce0.8Zr0.2O2 (IMP), especially at lower temperatures. It also presents a better coking resistance and a lower graphitization degree of the deposited carbon. The superior catalytic activity and coke resistance of Ni-Ce0.8Zr0.2O2 (GNP) is attributed to the small particle size of the active metallic nickel phase and the strong interaction between the nickel and the Ce0.8Zr0.2O2 support, as evidenced by the XRD and H-2-TPR. The Ni-Ce0.8Zr0.2O2 (GNP) is further applied as an anode functional layer in solid oxide fuel cells operating on ethanol steam. The cell yields a peak power density of 536 mW cm(-2) at 700 degrees C when operating on EtOH-H2O gas mixtures, which is only slightly lower than that of hydrogen fuel, whereas the cell without the functional layer failed for short-term operations. Ni-Ce0.8Zr0.2O2 (GNP) is promising as an active and highly coking-resistant catalyst layer for solid-oxide fuel cells operating on ethanol steam fuel. (C) 2011 Elsevier B.V. All rights reserved.
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