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Bioinspired fiber-like porous Cu/N/C electrocatalyst facilitating electron transportation toward oxygen reaction for metal–air batteries

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Abstract

Laccase is one of the most effective biocatalysts for oxygen reduction under physiological conditions. Its unique Cu- and N-based active sites with direct electrical pathways for electrons can guarantee rapid oxygen exchange and reduction. Inspired by this specific structure, we designed and fabricated porous fiber-like Cu/N/C based on MOFs as an ORR catalyst. Precision morphology control of fibers contributed to an increase in the electron transport rate compared with that of Cu/N/C nanoparticles, which could minimize interparticle ohmic contacts and provide direct electrical pathways along with sufficient active sites to catalyze oxygen reduction. The designed Cu/N/C catalyst exhibited similar electrochemical activity to that of a commercially available 20 wt% Pt/C ORR catalyst. Moreover, after being employed as the cathode of aluminium–air batteries, the catalyst outperformed a commercial 5 wt% Pt/C catalyst.

Graphical abstract: Bioinspired fiber-like porous Cu/N/C electrocatalyst facilitating electron transportation toward oxygen reaction for metal–air batteries

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Publication details

The article was received on 17 May 2018, accepted on 02 Aug 2018 and first published on 03 Aug 2018


Article type: Paper
DOI: 10.1039/C8NR03981J
Citation: Nanoscale, 2018, Advance Article
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    Bioinspired fiber-like porous Cu/N/C electrocatalyst facilitating electron transportation toward oxygen reaction for metal–air batteries

    Q. Wang, Z. Zhang, M. Wang, F. Liu, L. Jiang, B. Hong, J. Li and Y. Lai, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR03981J

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