文章基本信息

标题：Electrochemical performance and carbon deposition resistance of M-BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3-δ (M = Pd, Cu, Ni or NiCu) anodes for solid oxide fuel cells
本地全文：下载
作者：Meng Li ; Bin Hua ; Jian Pu 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep07667
出版社：Springer Nature
摘要：Pd-, Cu-, Ni- and NiCu-BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3-δanodes, designated as M-BZCYYb, were prepared by impregnating M-containing solution into BZCYYb scaffold, and investigated in the aspects of electrocatalytic activity for the reactions of H₂ and CH₄ oxidation and the resistance to carbon deposition. Impregnation of Pd, Ni or NiCu significantly reduced both the ohmic (R_Ω) and polarization (R_P) losses of BZCYYb anode exposed to H₂ or CH₄, while Cu impregnation decreased only R_Ωin H₂ and the both in CH₄. Pd-, Ni- and NiCu-BZCYYb anodes were resistant to carbon deposition in wet (3 mol. % H₂O) CH₄ at 750°C. Deposited carbon fibers were observed in Pd- and Ni-BZCYYb anodes exposed to dry CH₄ at 750°C for 12 h, and not observed in NiCu-BZCYYb exposed to dry CH₄ at 750°C for 24 h. The performance of a full cell with NiCu-BZCYYb anode, YSZ electrolyte and La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ-Gd doped CeO₂ (LSCF-GDC) cathode was stable at 750°C in wet CH₄ for 130 h, indicating that NiCu-BZCYYb is a promising anode for direct CH₄ solid oxide fuel cells (SOFCs).