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Highly crumpled nanocarbons as efficient metal-free electrocatalysts for zinc–air batteries

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Abstract

The rational design of an efficient and robust oxygen reduction reaction (ORR) electrocatalyst is vital for energy conversion and storage systems, especially for metal–air batteries. Herein, we report a highly nanocrumpled and nitrogen, phosphorus-codoped nanocarbon (NC-NPC) synthesized by direct pyrolysis of melamine and triphenylphosphine. With the rich nano-crumpled structure and codoping of heteroatoms, this low-cost catalyst exhibits an excellent ORR performance, and possesses a half-wave potential of 0.84 V vs. RHE, a small Tafel slope of 70.2 mV dec−1, and good electrocatalytic stability. More importantly, it can also be applied in zinc–air batteries as an efficient electrode which delivers an open-circle voltage of 1.38 V, a specific capacity of 782 mA h gZn−1, and a long cycling life of 210 h, superior to the commercial Pt/C catalyst.

Graphical abstract: Highly crumpled nanocarbons as efficient metal-free electrocatalysts for zinc–air batteries

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Publication details

The article was received on 19 May 2018, accepted on 11 Jul 2018 and first published on 18 Jul 2018


Article type: Paper
DOI: 10.1039/C8NR04068K
Citation: Nanoscale, 2018, Advance Article
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    Highly crumpled nanocarbons as efficient metal-free electrocatalysts for zinc–air batteries

    Y. Xiao, Z. Cheng, Y. Zhao and L. Qu, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR04068K

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