Anisotropic catalytic activity of the orientation controlled Nd₂NiO_4 + δ/YSZ hetero-epitaxial system for SOFC cathode

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• 作者：Atsuo Yamada ; Kazuyuki Saka ; Makiko Uehara ; Sou Taminato ; Ryoji Kanno ; Fabrice Mauvy ; Claude Grenier
• 关键词：K₂NiF₄ ; Solid oxide fuel cell ; Epitaxial film ; Oxygen reduction ; Anisotropy
• 刊名：Electrochemistry Communications
• 出版年：2010
• 出版时间：December 2010
• 年：2010
• 卷：12
• 期：12
• 页码：1690-1693
• 全文大小：871 K

文摘

Electrode–electrolyte hetero-epitaxial systems for solid oxide fuel cells (SOFCs) with two different configuration of Nd₂NiO_4 + δ(110)//YSZ(100) and Nd₂NiO_4 + δ(100)//YSZ(110) were successfully fabricated by pulsed laser deposition. Thin films of Nd₂NiO_4 + δ approximately 20 nm thick were grown on a commercial single crystal of YSZ. The preferred two-dimensional diffusion paths of the oxide ions were perpendicular to the substrate for both configurations and showed oxygen reduction capability different from each other. This opens up new research direction focusing on the details of anisotropic catalytic activity of SOFC cathode depending on the crystalline surface.