A N-, Fe- and Co-tridoped carbon nanotube/nanoporous carbon nanocomposite with synergistically enhanced activity for oxygen reduction in acidic media
A N-, Fe- and Co-tridoped carbon nanotube/nanoporous carbon nanocomposite with synergistically enhanced activity for oxygen reduction in acidic media
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N、Fe、Co三掺杂碳纳米管/纳米孔碳纳米复合材料，在酸性介质中协同增强氧还原活性
DOI：
10.1039/c5ta03523f
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发表时间：
2015-01-01
影响因子：
11.9
通讯作者：
Wu, Qing-Sheng
中科院分区：
文献类型：
--
作者：
Wang, Gan;Wang, Wan-hua;Wu, Qing-Sheng
酸性介质中氧还原反应的电催化剂在质子交换膜(PEM)燃料电池和其他电化学设备中是至关重要的。在酸性介质中实现理想的ORR活性和耐久性仍然是一个挑战。在这里，我们开发了一种新的NFeCo-CNT/NC纳米复合电催化剂，该催化剂以高度可用和可回收的植物香椿为原料，采用一种易于扩展的方法。该电催化剂具有优良的ORR活性、优异的稳定性和在酸性介质中对甲醇中毒的耐受性。典型产物的起始电位值和半峰电位值分别比铂碳电极低70 mV和65 mV。纳米复合材料中的NFeCo-CNT和NFeCo-NC具有协同增强的ORR活性。该催化剂可能在燃料电池中有实际应用。这项工作的一个重要成果是发现了以三聚氰胺为碳纳米管前驱体时，痕量Fe3+和Co2+可以协同催化碳纳米管的生长。
Electrocatalysts for the oxygen reduction reaction (ORR) in acidic media are crucial in proton-exchange membrane (PEM) fuel cells and other electrochemical devices. Achieving ideal ORR activity and durability in acidic media remains a challenge. Here, we developed a new NFeCo-CNT/NC nanocomposite electrocatalyst from the highly available and recyclable plant biomass Typha orientalis using a readily scalable approach. The electrocatalyst exhibits excellent ORR activity, superior stability and tolerance to methanol poisoning effects in acidic media. The value of the onset potential and half-peak potential of the typical product is only 70 mV and 65 mV less than that of Pt/C, respectively. The NFeCo-CNT and NFeCo-NC in the nanocomposite have synergistically enhanced ORR activities. The catalyst may have practical applications in fuel cells. One of the important accomplishments of this work is the discovery that trace Fe3+ and Co2+ can synergistically catalyze the growth of the carbon nanotubes when melamine serves as the CNT precursor.