Nitrogen-doped carbon nanotubes derived from Zn-Fe-ZIF nanospheres and their application as efficient oxygen reduction electrocatalysts with in situ generated iron species
Nitrogen-doped carbon nanotubes derived from Zn-Fe-ZIF nanospheres and their application as efficient oxygen reduction electrocatalysts with in situ generated iron species
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DOI：
10.1039/c3sc51052b
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发表时间：
2013-01-01
期刊：
影响因子：
8.4
通讯作者：
Yang, Qihua
中科院分区：
文献类型：
--
作者：
Su, Panpan;Xiao, Hui;Yang, Qihua
采用Zn-Fe-ZIF直接固相热解法成功制备了氮掺杂碳纳米管（NCNTs），并通过将Zn-Fe-ZIF与适量的双氰胺（DCDA）混合，对NCNTs的N含量、N掺杂状态、直径和形成温度进行了微调。DCDA作为额外的氮源，由于其对石墨结构的诱导作用，有利于在相对较低的温度下形成NCNTs。所合成的碳纳米管具有铁物种和高含量的石墨态氮，在碱性溶液中作为氧还原电催化剂表现出比商业Pt/C更高的催化活性。
Nitrogen-doped carbon nanotubes (NCNTs) have been successfully synthesized via the direct solid pyrolysis of Zn-Fe-ZIF and the N content, N doped state, diameter and formation temperature of the NCNTs can be finely tuned by mixing Zn-Fe-ZIF with proper amounts of dicyandiamide (DCDA). DCDA serves as the extra nitrogen supplier and favors the formation of NCNTs at relatively low temperature due to its inducing effect for graphitic structure. The synthesized NCNTs, with iron species and high amounts of graphitic N, exhibit higher catalytic activity than commercial Pt/C as oxygen reduction electrocatalysts in alkaline solution.