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N, P‑Doped Carbon with Encapsulated Co Nanoparticles as Efficient Electrocatalyst for Oxygen Reduction Reaction

Abstract

Exploring of efficient non-noble ORR catalysts alternative to Pt-based catalysts are highly demanded for fuel cells and rechargeable metal-air batteries. Herein, we demonstrate a rational design and synthesis of a N, P‑doped carbon with encapsulated Co nanoparticles as efficient electrocatalyst for ORR. The catalyst is derived from a mixture of Co-MOF and triphenylphosphine with mass ratio of 3:1 by pyrolysis in N2 atomsphere at 700 oC. The catalyst exhibits a superior ORR catalytic performance among its counterparts in 0.1 M KOH with onset and half-wave potentials of 0.88 and 0.80 V, much larger limiting current density of –5.93 mA cm-2 that surpasses the commercial 20 % Pt/C, in addition to the durability and resistance to methanol. The enhanced ORR activity of the catalyst can be attributed to the synergistic effect between Co NPs and N, P atoms, the relative large contact surface, more exposed active sites and good electrical conductivity. This work would provide some new ideas for designing and constructing promising carbon based non-precious metal electrocatalysts for future practical fuel-cell applications.

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Publication details

The article was received on 24 Nov 2018, accepted on 09 Jan 2019 and first published on 09 Jan 2019


Article type: Paper
DOI: 10.1039/C8DT04650F
Citation: Dalton Trans., 2019, Accepted Manuscript
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    N, P‑Doped Carbon with Encapsulated Co Nanoparticles as Efficient Electrocatalyst for Oxygen Reduction Reaction

    L. Fan, X. Du, Y. Zhang, M. Li, M. Wen, X. Ge, Z. Kang and D. Sun, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C8DT04650F

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