FeCo nanoalloys embedded in nitrogen-doped carbon nanosheets/bamboo-like carbon nanotubes for the oxygen reduction reaction

Xiao-Wei Song, Shuwei Zhang, Haihong Zhong, Yuan Gao, Luis A. Estudillo-Wong, Nicolas Alonso-Vante, Xin Shu, Yongjun Feng

Research output: Contribution to journalArticlepeer-review

Abstract

Herein, FeCo bimetallic organic frameworks (MOFs) with different compositions were fabricated by controlling the initial molar ratio of Fe 3+ /Co 2+ ions. Herein, FeCo bimetallic organic frameworks (MOFs) with different compositions were fabricated by controlling the initial molar ratio of Fe 3+ /Co 2+ 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 (Fe x Co y –N–C), were prepared. The Fe x Co y –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–N x , 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 Fe x Co y –N–C electrocatalysts, the optimized Fe 1 Co 3 –N–C and Fe 3 Co 1 –N–C catalysts showed higher ORR performance. In addition, both Fe 1 Co 3 –N–C and Fe 3 Co 1 –N–C showed superior stability compared to the benchmark commercial Pt/C catalyst.
Original languageAmerican English
Pages (from-to)109
Number of pages121
JournalInorganic Chemistry Frontiers
DOIs
StatePublished - 2021

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