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FeCo nanoalloys embedded in nitrogen-doped carbon nanosheets/bamboo-like carbon nanotubes for the oxygen reduction reaction
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2020-10-22 , DOI: 10.1039/d0qi01037e
Xiao-Wei Song 1, 2, 3, 4, 5 , Shuwei Zhang 1, 2, 3, 4, 5 , Haihong Zhong 1, 2, 3, 4, 5 , Yuan Gao 1, 2, 3, 4, 5 , Luis A. Estudillo-Wong 6, 7, 8, 9, 10 , Nicolas Alonso-Vante 11, 12, 13, 14, 15 , Xin Shu 1, 2, 3, 4, 5 , Yongjun Feng 1, 2, 3, 4, 5
Affiliation  

Herein, FeCo bimetallic organic frameworks (MOFs) with different compositions were fabricated by controlling the initial molar ratio of Fe3+/Co2+ ions. Through a one-step carbonization treatment of FeCo MOFs and the melamine mixture, a series of FeCo nanoalloys encapsulated in bamboo-like N-doped carbon nanotubes (CNTs), entangled with N-doped carbon nanosheet nanocomposites (FexCoy–N–C), were prepared. The FexCoy–N–C materials presented an excellent ORR performance in alkaline medium. X-ray photoelectron spectroscopy (XPS) studies revealed the existence of ORR-active centers, such as Co–Nx, pyridinic-N and graphitic-N, which were responsible for the enhanced ORR activity. Besides, the synergistic coupling between FeCo alloy and N-doped carbon nanotubes favors the enhancement of the electrocatalytic performance. Among FexCoy–N–C electrocatalysts, the optimized Fe1Co3–N–C and Fe3Co1–N–C catalysts showed higher ORR performance. In addition, both Fe1Co3–N–C and Fe3Co1–N–C showed superior stability compared to the benchmark commercial Pt/C catalyst.

中文翻译:

嵌入氮掺杂碳纳米片/类竹碳纳米管中的FeCo纳米合金用于氧还原反应

本文中,通过控制Fe 3+ / Co 2+离子的初始摩尔比,制备了具有不同组成的FeCo双金属有机骨架(MOF)。通过FeCo MOF和三聚氰胺混合物的一步碳化处理,一系列包裹在竹状N掺杂碳纳米管(CNT)中的FeCo纳米合金与N掺杂碳纳米片纳米复合材料缠结在一起(Fe x Co y –N– C),准备。Fe x Co y –N–C材料在碱性介质中具有出色的ORR性能。X射线光电子能谱(XPS)研究表明存在ORR活性中心,例如Co–N x,吡啶-N和石墨-N负责增强ORR活性。此外,FeCo合金与N掺杂碳纳米管之间的协同偶联有利于增强电催化性能。在Fe x Co y –N–C电催化剂中,经过优化的Fe 1 Co 3 –N–C和Fe 3 Co 1 –N–C催化剂显示出更高的ORR性能。此外,与基准商用Pt / C催化剂相比,Fe 1 Co 3 -NC和Fe 3 Co 1 -NC均显示出优异的稳定性。
更新日期:2020-11-06
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