Pristine carbon nanotube/iron phthalocyanine hybrids with a well-defined nanostructure show excellent efficiency and durability for the oxygen reduction reaction
Pristine carbon nanotube/iron phthalocyanine hybrids with a well-defined nanostructure show excellent efficiency and durability for the oxygen reduction reaction
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DOI：
10.1039/c6ta07882f
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发表时间：
2017-01
影响因子：
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通讯作者：
Jun Yang;F. Toshimitsu;Zehui Yang;T. Fujigaya;N. Nakashima
中科院分区：
文献类型：
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作者：
Jun Yang;F. Toshimitsu;Zehui Yang;T. Fujigaya;N. Nakashima
开发用于燃料电池和电池的高性能、耐用、可扩展的非铂电催化剂是下一代生态友好型能源社会的强烈社会需求。在这里，我们提出了一种原始的多壁碳纳米管/铁酞菁(MWNT/FePc)杂化催化剂，具有定义良好的纳米结构，用于碱性介质中的氧还原反应(ORR)，以满足这一要求。通过仔细调整沉积在多壁碳纳米管载体高度结晶的石墨表面的FePc堆积层的微观结构，获得了超高的ORR活性和优异的耐久性。此外，采用优化后的MWNT/−正极材料制作的锌-空气电池在室温下的功率密度为185mW cm FeP2。基于密度泛函理论的MWNT/FePc纳米结构的计算表明，沉积在MWNTs弯曲的石墨化表面，显著改变了源于π-π相互作用的FePc的几何结构和电子结构，从而提高了电催化活性和耐久性。
Development of non-platinum electrocatalysts with high performance, durability, and scalability for fuel cells and batteries is a strong social demand for a next-generation eco-friendly energy society. Here, we present a pristine multi-walled carbon nanotube/iron phthalocyanine (MWNT/FePc) hybrid catalyst with a well-defined nanostructure for the oxygen reduction reaction (ORR) in alkaline media that meets this demand. By carefully tuning the microstructure of the FePc stack layer deposited on the highly crystallized graphitic surface of a MWNT support, an ultra-high ORR activity as well as excellent durability are obtained. Moreover, a power density of 185 mW cm−2 at 0.8 V was obtained for a zinc–air battery using this optimized MWNT/FePc cathode at room temperature. Density functional theory-based calculations of such a well-defined nanostructure of MWNT/FePc have suggested that deposition on the bent graphitic surface of MWNTs significantly changes the geometric and electronic structures of FePc that originated from π–π interactions, leading to such enhanced electrocatalytic activity and durability.