TY - JOUR
T1 - FeCo nanoalloys embedded in nitrogen-doped carbon nanosheets/bamboo-like carbon nanotubes for the oxygen reduction reaction
AU - Song, Xiao-Wei
AU - Zhang, Shuwei
AU - Zhong, Haihong
AU - Gao, Yuan
AU - Estudillo-Wong, Luis A.
AU - Alonso-Vante, Nicolas
AU - Shu, Xin
AU - Feng, Yongjun
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
UR - https://www.mendeley.com/catalogue/4f0b38a4-cc1e-3f51-9d0c-953f6793d776/
U2 - 10.1039/d0qi01037e
DO - 10.1039/d0qi01037e
M3 - Article
SP - 109
JO - Inorganic Chemistry Frontiers
JF - Inorganic Chemistry Frontiers
SN - 2052-1545
ER -