1. 分级孔结构的 Fe-N-C 催化剂用于高效电催化氧还原.
- Author
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郑锐雪, 孟庆磊, 张 丽, 刘长鹏, 邢 巍, and 肖梅玲
- Subjects
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PROTON exchange membrane fuel cells , *METAL catalysts , *OXYGEN reduction , *CHARGE exchange , *CATALYSTS , *LITHIUM-air batteries - Abstract
Oxygen reduction reaction (ORR) is an important cathode reaction for metal-air batteries and proton exchange membrane fuel cells (PEMFCs). It is of great significance to study non-noble metal catalysts with high activity and stability. In this paper, MIL-101(- Al-Fe) with hierarchical porous structure is innovatively used as the metal precursor template, and Fe-N-C catalysts with rich mesoporous structure are successfully prepared. Electrochemical test results show that Fe-N-C-MIL-900 shows the best ORR activity with half-wave potential of 0. 905 V in 0. 1 mol/L KOH electrolyte. The ORR electron transfer number of Fe-N-C-MIL-900 catalyst is 3. 98, and the H2O2 yield is less than 3%, demonstrating an obvious 4-electron ORR pathway. This work provides a new way to prepare hierarchically porous Fe-N-C catalysts with high ORR activity. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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