Nanowire-Directed Templating Synthesis of Metal-Organic Framework Nanofibers and Their Derived Porous Doped Carbon Nanofibers for Enhanced Electrocatalysis
Nanowire-Directed Templating Synthesis of Metal-Organic Framework Nanofibers and Their Derived Porous Doped Carbon Nanofibers for Enhanced Electrocatalysis
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纳米线定向模板合成金属有机框架纳米纤维及其衍生的多孔掺杂碳纳米纤维用于增强电催化
DOI：
10.1021/ja5084128
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发表时间：
2014-10-15
影响因子：
15
通讯作者：
Yu, Shu-Hong
中科院分区：
文献类型：
--
作者：
Zhang, Wang;Wu, Zhen-Yu;Yu, Shu-Hong
金属有机骨架（MOF）纳米纤维的定向模板合成已经被证明，其中具有优异分散性的碲纳米线（TeNW）可以充当用于定向生长和组装ZIF-8纳米晶体（一种典型的MOF）的模板，导致形成均匀的ZIF-8纳米纤维。所得ZIF-8纳米纤维可以通过煅烧方便地转化为高度多孔的掺杂碳纳米纤维。与直接碳化法制备的多孔碳相比，掺杂碳纳米纤维具有复杂的网络结构、多级孔结构和较高的比表面积。进一步掺杂磷物种，共掺杂的碳纳米纤维表现出优异的电催化性能的氧还原反应，甚至优于基准Pt/C催化剂。
A nanowire-directed templating synthesis of metalorganic framework (MOF) nanofibers has been demonstrated, where ultrathin tellurium nanowires (TeNWs) with excellent dispersivity can act as templates for directed growth and assembly of ZIF-8 nanocrystals (one typical MOF), resulting in the formation of uniform ZIF-8 nanofibers. The as-obtained ZIF-8 nanofibers can be conveniently converted into highly porous doped carbon nanofibers by calcination. Compared with bulk porous carbon by direct carbonization of MOF crystals, these doped carbon nanofibers exhibit complex network structure, hierarchical pores, and high surface area. Further doped by phosphorus species, the co-doped carbon nanofibers exhibit excellent electrocatalytic performance for oxygen reduction reaction, even better than the benchmark Pt/C catalyst.