Enhancement of anode activity and stability by Cr addition at Ni/Sm-doped CeO2 cermet anodes in NH3-fueled solid oxide fuel cells

被引：33

作者：

Hashinokuchi, Michihiro ^{[1
]}

Zhang, Mengjia ^{[1
]}

Doi, Takayuki ^{[1
]}

Inaba, Minoru ^{[1
]}

机构：

[1] Doshisha Univ, Dept Mol Chem & Biochem, Kyoto 6100321, Japan

来源：

SOLID STATE IONICS | 2018年 / 319卷

关键词：

Nickel; Chromium; Ammonia; SOFC; Sm-doped ceria; PROTON CONDUCTING ELECTROLYTE; AMMONIA DECOMPOSITION; PERFORMANCE; CATALYSTS; HYDROGEN; ENERGY; SOFCS;

D O I：

10.1016/j.ssi.2018.02.015

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：

Chromium was added to nickel/Sm2O3-doped ceria (Ni/SDC) cermets by a CrCl3 impregnation method, and the activity of the resulting Ni-Cr/SDC cermets was evaluated as anodes in ammonia-fueled solid oxide fuel cells (SOFCs) in the temperature range of 773 to 1173 K. It has been revealed that the addition of Cr was effective for the catalytic activity for NH3 reforming, followed by hydrogen oxidation. The optimum amount of Cr was 3 at.% of the total metal in the Ni-Cr/SDC cermets. In addition, we demonstrated the improved stability of the Ni-97-Cr-3/SDC cermets in NH3 atmosphere at 873 K. The addition of Cr suppressed the agglomeration of Ni, and promoted the anode durability. XRD analysis suggested the formation of a nitride CrN during operation in the Ni-97-Cr-3/SDC anode, and the role of the nitride was discussed in detail.

引用

页码：180 / 185

页数：6

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