Journal
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
Volume 31, Issue 4, Pages 527-535Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2021.06.002
Keywords
Zeolitic imidazolate framework; Mesoporous carbon shell; N-doped porous carbon; Metal-macrocycle; Oxygen reduction reaction
Funding
- National Natural Science Foundation of China [21606219, 21503081]
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FeCo/MCS-NPCS demonstrates superior oxygen reduction reaction performance, attributed to Fe and/or Co-based nitrides and carbides, as well as N-doped carbon matrixes modified with mesoporous carbon shells.
FeCo-based non-noble metal electrocatalysts (NNMEs) of FeCo/MCS-NPCS was fabricated by immobilization of hemin on mesoporous carbon shells modified N-doped porous carbon spheres (MCS-NPCS). The obtained FeCo/ MCS-NPCS exhibits a half-wave potential (E1/2) of 0.851 V versus the reversible hydrogen electrode (vs. RHE) and a limited-diffusion current density (JL) of 5.45 mA cm-2. In addition, FeCo/MCS-NPCS shows comparable oxygen reduction reaction (ORR) performances to 20 wt% Pt/C in terms of E1/2 and JL and better electrochemical properties, including the methanol tolerance and durability in alkaline solution. Such outstanding electrochemical activities of FeCo/MCS-NPCS can be ascribed to Fe and/or Co-based nitrides and carbides as well as N-doped carbon matrixes modified with mesoporous carbon shells. This research introduces a promising path to design and synthesize highly efficient FeCo-N-C electrocatalysts towards ORR.
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