阳极
催化作用
材料科学
氨
耐久性
钯
非阻塞I/O
化学工程
氧化物
陶瓷
极化(电化学)
无机化学
复合材料
冶金
电极
化学
有机化学
物理化学
工程类
作者
Heon Jun Jeong,Wanhyuk Chang,Beum Geun Seo,Yun Sung Choi,Keun Hee Kim,Dong Hwan Kim,Joon Hyung Shim
出处
期刊:Small
[Wiley]
日期:2023-03-03
卷期号:19 (22)
被引量:9
标识
DOI:10.1002/smll.202208149
摘要
This study reports the performance and durability of a protonic ceramic fuel cells (PCFCs) in an ammonia fuel injection environment. The low ammonia decomposition rate in PCFCs with lower operating temperatures is improved relative to that of solid oxide fuel cells by treatment with a catalyst. By treating the anode of the PCFCs with a palladium (Pd) catalyst at 500 °C under ammonia fuel injection, the performance (peak power density of 340 mW cm-2 at 500 °C) is approximately two-fold higher than that of the bare sample not treated with Pd. Pd catalysts are deposited through an atomic layer deposition post-treatment process on the anode surface, in which nickel oxide (NiO) and BaZr0.2 Ce0.6 Y0.1 Yb0.1 O3-δ (BZCYYb) are mixed, and Pd can penetrate the anode surface and porous interior. Impedance analysis confirmed that Pd increased the current collection and significantly reduced the polarization resistance, particularly in the low-temperature region (≈500 °C), thereby improving the performance. Furthermore, stability tests showed that superior durability is achieved compared with that of the bare sample. Based on these results, the method presented herein is expected to represent a promising solution for securing high-performance and stable PCFCs based on ammonia injection.
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