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Issue 24, 2019
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Carbon nanotube-linked hollow carbon nanospheres doped with iron and nitrogen as single-atom catalysts for the oxygen reduction reaction in acidic solutions

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Abstract

Non-noble metal electrocatalysts toward the oxygen reduction reaction (ORR) are highly required to substitute expensive Pt/C as the cathode of proton exchange membrane fuel cells. However, the relatively low ORR activity of Pt-free catalysts under acidic conditions is the major issue. Herein, we engineered a three-dimensional structure consisting of atomically dispersed Fe, N-doped hollow carbon nanospheres linked by carbon nanotubes as an electrocatalyst for the ORR. Benefiting from the unique structure and high-density atomic Fe–Nx sites, this new type of electrocatalyst showed an impressive ORR half-wave potential of 0.84 V and kinetic current density of 13.1 mA cm−2 at a potential of 0.8 V in acidic media, which was even better those of commercial Pt/C.

Graphical abstract: Carbon nanotube-linked hollow carbon nanospheres doped with iron and nitrogen as single-atom catalysts for the oxygen reduction reaction in acidic solutions

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Publication details

The article was received on 15 Jan 2019, accepted on 24 May 2019 and first published on 28 May 2019


Article type: Communication
DOI: 10.1039/C9TA00508K
J. Mater. Chem. A, 2019,7, 14478-14482

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    Carbon nanotube-linked hollow carbon nanospheres doped with iron and nitrogen as single-atom catalysts for the oxygen reduction reaction in acidic solutions

    J. Li, M. Cheng, T. Li, L. Ma, X. Ruan, D. Liu, H. Cheng, C. Liu, D. Du, Z. Wei, Y. Lin and M. Shao, J. Mater. Chem. A, 2019, 7, 14478
    DOI: 10.1039/C9TA00508K

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