The effect of temperature on ionic liquid modified Fe-N-C catalysts for alkaline oxygen reduction reaction

被引:16
作者
Wolker, Thomas [1 ]
Brunnengraeber, Kai [1 ]
Martinaiou, Ioanna [2 ,3 ,4 ]
Lorenz, Nick [1 ]
Zhang, Gui-Rong [1 ,5 ]
Kramm, Ulrike, I [2 ,3 ,4 ]
Etzold, Bastian J. M. [1 ]
机构
[1] Tech Univ Darmstadt, Ernst Berl Inst Tech & Makromolekulare Chem, Dept Chem, D-64287 Darmstadt, Germany
[2] Tech Univ Darmstadt, Catalysts & Electrocatalysts Grp, Dept Chem, D-64287 Darmstadt, Germany
[3] Tech Univ Darmstadt, Grad Sch Excellence Energy Sci & Engn, D-64287 Darmstadt, Germany
[4] Tech Univ Darmstadt, Dept Mat & Earth Sci, D-64287 Darmstadt, Germany
[5] Tiangong Univ, Sch Chem Engn & Technol, Tianjin 300387, Peoples R China
来源
JOURNAL OF ENERGY CHEMISTRY | 2022年 / 68卷
基金
欧洲研究理事会;
关键词
Oxygen reduction reaction; Non-precious metal catalyst; Ionic liquid; Fe-N-C catalyst; Temperature effect; WATER-ADSORPTION; METAL-CATALYSTS; CARBON; PERFORMANCE; ELECTROCATALYSTS; COMPOSITE; SULFUR;
D O I
10.1016/j.jechem.2021.11.042
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Modifying solid catalysts with an ionic liquid layer is an effective approach for boosting the performance of both Pt-based and non-precious metal catalysts toward the oxygen reduction reaction. While most studies operated at room temperature it remains unclear whether the IL-associated boosting effect can be maintained at elevated temperature, which is of high relevance for practical applications in low temperature fuel cells. Herein, Fe-N-C catalysts were modified by introducing small amounts of hydrophobic ionic liquid, resulting in boosted electrocatalytic activity towards the alkaline oxygen reduction reaction at room temperature. It is demonstrated that the boosting effect can be maintained and even strengthened when increasing the electrolyte temperature up to 70 degrees C. These findings show for the first time that the incorporation of ionic liquid is a suited method to obtain advanced noble metal-free electrocatalysts that can be applied at operating temperature condition.CO 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
引用
收藏
页码:324 / 329
页数:6
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