材料科学
铋
氧还原
兴奋剂
阴极
氧还原反应
氧化物
燃料电池
固体氧化物燃料电池
氧气
还原(数学)
化学工程
无机化学
纳米技术
光电子学
电化学
电极
冶金
物理化学
电解质
有机化学
化学
几何学
数学
工程类
作者
Fangjun Jin,Xiaowei Liu,Yunfeng Tian,Yihan Ling
标识
DOI:10.1002/adfm.202400519
摘要
Abstract Layered perovskite related oxides, LnBaCo 2 O 5+ δ (Ln = rare‐earth element) are potential ceramic cathodes for intermediate temperature solid oxide fuel cells. Herein, a simple way to tune the performance of NdBaCo 2 O 5+ δ (NBC) perovskite as a cathode by doping the Co‐site with bismuth cation is reported. Compared with the parent oxide, the obtained stabilized double perovskites NdBaCo 2− x Bi x O 5+ δ ( x = 0.1 and 0.2) show a much improved electrocatalytic activity, achieving area‐specific resistance of 0.268, 0.107 and 0.152 Ω cm 2 at 700 °C in air for NBC, x = 0.1, and 0.2, respectively. Density functional theory results demonstrate that bismuth doping effectively reduces the formation energy of oxygen vacancies. Moreover, the bismuth doping of NdBaCo 2− x Bi x O 5+ δ cathode is much more robust against CO 2 than that of NBC cathode. This work indicates that bismuth doping in the B‐site of LnBaCo 2 O 5+ δ may be a highly attractive strategy for the future development of cathode materials.
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