| Fe/N/C三维气凝胶自支撑催化剂的氧还原性能 | |
| Oxygen reduction performance of self-supported Fe/N/C three-dimensional aerogel catalyst layers | |
| 摘要: 以过硫酸铵引发吡咯单体原位聚合形成的三维多孔气凝胶为载体，以二茂铁为金属前驱体，在氩气气氛下通过高温热解法制备出系列不同铁负载量的Fe/N/C催化剂。结果表明，基于气凝胶载体制备的催化剂在酸性介质中展现出优异的氧还原反应(ORR)活性及稳定性。当二茂铁载量为12 mg时制得的催化剂性能最佳，其半波电位达0.691 V (vs RHE)，平均电子转移数为3.97，表明反应过程接近理想的四电子路径。另外，该催化剂经10 000圈循环伏安测试后，半波电位仅衰减11 mV，展现出较好的电化学耐久性。 | |
| 关键词: 非贵金属催化剂 Fe/N/C催化剂 气凝胶 氧还原反应 燃料电池 | |
| 基金项目: 湖北省自然科学基金(青年类)(No.2023AFB052)、 国家重点研发计划项目(No.2021YFB3800400)、 “新能源汽车与智慧交通” 湖北省优势特色学科群(No.TSXKQ003)资助。 | |
| Abstract: Using ammonium persulfate-initiated in-situ polymerization of pyrrole monomer to form a threedimensional porous aerogel as the carrier, and ferrocene as the metal precursor, a series of Fe/N/C catalysts with different iron loadings were prepared via high-temperature pyrolysis under argon atmosphere. The results demonstrated that the aerogel-supported catalysts exhibited excellent oxygen reduction reaction (ORR) activity and stability in acidic media. The optimal catalyst performance was achieved when the ferrocene loading was 12 mg, showing a half-wave potential of 0.691 V (vs RHE) and an average electron transfer number of 3.97, indicating a reaction pathway approaching the ideal four-electron process. Moreover, after 10 000 cycles of cyclic voltammetry testing, the half -wave potential of this catalyst only decayed by 11 mV, highlighting its superior electrochemical durability. | |
| Keywords: non-precious metal catalyst Fe/N/C catalyst aerogel oxygen reduction reaction fuel cell | |
| 投稿时间：2024-10-24 修订日期：2025-05-08 | |
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