School of Chemical Engineering, The University of Queensland , St. Lucia, Queensland 4072, Australia.
Jiangsu National Synergetic Innovation Center for Advanced Materials, State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University , No. 5 Xin Mofan Road, Nanjing 210009, P. R. China.
ACS Appl Mater Interfaces. 2017 Jan 25;9(3):2326-2333. doi: 10.1021/acsami.6b12606. Epub 2017 Jan 12.
Susceptibility to CO is one of the major challenges for the long-term stability of the alkaline-earth-containing cathodes for intermediate-temperature solid oxide fuel cells. To alleviate the adverse effects from CO, we incorporated samarium-stabilized ceria (SDC) into a SrCoTaO (SCT15) cathode by either mechanical mixing or a wet impregnation method and evaluated their cathode performance stability in the presence of a gas mixture of 10% CO, 21% O, and 69% N. We observed that the CO tolerance of the hybrid cathode outperforms the pure SCT15 cathode by over 5 times at 550 °C. This significant enhancement is likely attributable to the low CO adsorption and reactivity of the SDC protective layer, which are demonstrated through thermogravimetric analysis, energy-dispersive spectroscopy, and electrical conductivity study.
对于中温固体氧化物燃料电池中含碱土金属的阴极的长期稳定性而言，对 CO 的敏感性是主要挑战之一。为了减轻 CO 的不利影响，我们通过机械混合或湿浸渍法将钐稳定氧化铈（SDC）掺入 SrCoTaO（SCT15）阴极中，并在含有 10%CO、21%O 和 69%N 的混合气体中评估了它们的阴极性能稳定性。我们发现，在 550°C 时，混合阴极的 CO 耐受性比纯 SCT15 阴极高出 5 倍以上。这种显著的增强可能归因于 SDC 保护层的低 CO 吸附和反应性，这通过热重分析、能量色散光谱和电导率研究得到了证明。
