材料科学
阳极
钙钛矿(结构)
烧结
金属陶瓷
纳米颗粒
氧化物
化学工程
合金
催化作用
纳米技术
陶瓷
冶金
电极
化学
物理化学
工程类
生物化学
作者
Xiandong Xiong,Jian Yu,Xiaogu Huang,Dan Zou,Yufei Song,M. Xu,Ran Ran,Wei Wang,Wei Zhou,Zongping Shao
标识
DOI:10.1016/j.jmst.2022.02.031
摘要
Fuel flexibility is one of the most distinguished advantages of solid oxide fuel cells (SOFCs) over other low-temperature fuel cells. Furthermore, the combination of ammonia fuel and SOFCs technology should be a promising clean energy system after considering the high energy density, easy transportation/storage, matured synthesis technology and carbon-free nature of NH3 as well as high efficiency of SOFCs. However, the large-scale applications of direct-ammonia SOFCs (DA-SOFCs) are strongly limited by the inferior anti-sintering capability and catalytic activity for ammonia decomposition reaction of conventional nickel-based cermet anode. Herein, a slightly ruthenium (Ru) doping in perovskite oxides is proposed to promote the alloy nanoparticle exsolution, enabling better DA-SOFCs with enhanced power outputs and operational stability. After treating Ru-doped Pr0.6Sr0.4Co0.2Fe0.75Ru0.05O3-δ single-phase perovskite in a reducing atmosphere, in addition to the formation of two layered Ruddlesden-Popper perovskites and Pr2O3 nanoparticles (the same as the Ru-free counterpart, Pr0.6Sr0.4Co0.2Fe0.8O3-δ), the exsolution of CoFeRu-based alloy nanoparticles is remarkably promoted. Such reduced Pr0.6Sr0.4Co0.2Fe0.75Ru0.05O3-δ composite anode shows superior catalytic activity and stability for NH3 decomposition reaction as well as anti-sintering capability in DA-SOFCs to those of reduced Pr0.6Sr0.4Co0.2Fe0.8O3-δ due to the facilitated nanoparticle exsolution and stronger nanoparticle/substrate interaction. This work provides a facile and effective strategy to design highly active and durable anodes for DA-SOFCs, promoting large-scale applications of this technology.
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