A new nickel-ceria composite for direct-methane solid oxide fuel cells

被引：35
作者：
Zhu, Huaiyu [1 ]
Wang, Wei [1 ]
Ran, Ran [1 ]
Shao, Zongping [1 ,2 ]
机构：
[1] Nanjing Univ Technol, Coll Chem & Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China
[2] Monash Univ, Dept Chem Engn, Clayton, Vic 3800, Australia
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 09期
基金：
美国国家科学基金会;
关键词：
Solid oxide fuel cells; Anode; Ni-based catalysts; Ceria; Steam reforming of methane; Carbon deposition; DIRECT OXIDATION; DOPED CERIA; CARBON DEPOSITION; FUNCTIONAL LAYER; BUFFER LAYER; ANODE; SOFC; PERFORMANCE; CATALYST; ELECTROLYTE;
D O I：
10.1016/j.ijhydene.2013.01.032
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Various Ni-LaxCe1-xOy composites were synthesized and their catalytic activity, catalytic stability and carbon deposition properties for steam reforming of methane were investigated. Among the catalysts, Ni-La0.1Ce0.9Oy showed the highest catalytic performance and also the best coking resistance. The Ni-LaxCe1-xOy catalysts with a higher Ni content were further sintered at 1400 degrees C and investigated as anodes of solid oxide fuel cells for operating on methane fuel. The Ni-La(0.1)Ce(0.9)Oy anode presented the best catalytic activity and coking resistance in the various Ni-LaxCe1-xOy catalysts with different ceria contents. In addition, the Ni-La0.1Ce0.9Oy also showed improved coking resistance over a Ni-SDC cermet anode due to its improved surface acidity. A fuel cell with a Ni-La0.1Ce0.9Oy anode and a catalyst yielded a peak power density of 850 mW cm(-2) at 650 degrees C while operating on a CH4-H2O gas mixture, which was only slightly lower than that obtained while operating on hydrogen fuel. No obvious carbon deposition or nickel aggregation was observed on the Ni-La0.1Ce0.9Oy anode after the operation on methane. Such remarkable performances suggest that nickel and La-doped CeO2 composites are attractive anodes for direct hydrocarbon SOFCs and might also be used as catalysts for the steam reforming of hydrocarbons. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：3741 / 3749
页数：9
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