Zhang Yanpei, Jiang Ruibin, Wang Zhongke, Xue Yanzhong, Sun Jie, Guo Yingjie
Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710119, China.
Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710119, China.
J Colloid Interface Sci. 2020 Nov 1;579:391-400. doi: 10.1016/j.jcis.2020.06.057. Epub 2020 Jun 15.
Transition metal- and N-codoped carbon nanotubes (CNTs) have superior catalytic activity because the curling surface enhances the bonding ability of atoms within CNTs to other species. However, it is a great challenge to prepare CNTs with transition metal- and N-doped at high level during the growth of CNTs. Here, (Fe,N-codoped CNT)/(Fe-based nanoparticle) (Fe,N-CNT/FeNP) hybrid nanostructures are for the first time prepared through the carbonization of Fe-doped g-CN. The doping of Fe and N is simultaneously realized during the formation of CNTs. Meanwhile, the abundant and homogeneous Fe and N in Fe-doped g-CN ensure high-level and uniform doping of Fe and N in CNTs. The Fe,N-CNT/FeNP hybrid nanostructures have several types of active components, including homogeneously distributed coordinating Fe moieties (FeCN or FeN) and CFe nanoparticles embedded in Fe,N-CNTs, towards oxygen reduction reaction (ORR). A superior ORR electrocatalytic performance is therefore obtained on the Fe,N-CNT/FeNP nanohybrids. Our preparation method opens an avenue to preparation of CNTs with transition metal- and N-doping at high-level, and the superior performance of Fe,N-CNT/FeNP nanostructures for ORR will be very helpful to the development of fuel cells and metal-air batteries.
过渡金属和氮共掺杂的碳纳米管（CNTs）具有优异的催化活性，因为卷曲表面增强了碳纳米管内原子与其他物种的键合能力。然而，在碳纳米管生长过程中制备高含量过渡金属和氮掺杂的碳纳米管是一项巨大的挑战。在此，首次通过铁掺杂的g-CN的碳化制备了（铁、氮共掺杂碳纳米管）/（铁基纳米颗粒）（Fe,N-CNT/FeNP）杂化纳米结构。在碳纳米管形成过程中同时实现了铁和氮的掺杂。同时，铁掺杂的g-CN中丰富且均匀的铁和氮确保了碳纳米管中铁和氮的高含量且均匀的掺杂。Fe,N-CNT/FeNP杂化纳米结构具有几种活性组分，包括均匀分布的配位铁部分（FeCN或FeN）以及嵌入Fe,N-碳纳米管中的CFe纳米颗粒，用于氧还原反应（ORR）。因此，在Fe,N-CNT/FeNP纳米杂化物上获得了优异的ORR电催化性能。我们的制备方法为制备高含量过渡金属和氮掺杂的碳纳米管开辟了一条途径，并且Fe,N-CNT/FeNP纳米结构对ORR的优异性能将对燃料电池和金属空气电池的发展非常有帮助。
