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Ultrafine NiCoP-decorated N,S,P-codoped hierarchical porous carbon nanosheets as an efficient bifunctional electrocatalyst for oxygen reduction and oxygen evolution

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Abstract

It is a great challenge to explore novel bifunctional electrocatalysts with low cost, high activity and improved stability for metal–air batteries. In this work, ultrafine NiCoP nanoparticles decorated on N,S,P-codoped hierarchical porous carbon nanosheets (NiCoP/NSP-HPCNS) were fabricated via a simple yet effective pyrolysis strategy. Herein, thiourea and phytic acid (PA) served as S and P sources, cobalt acetate (CA) and nickel phthalocyanine (NiPc) as the metal, C and N precursors. The NiCoP/NSP-HPCNS displayed extraordinary enhancement in oxygen reduction reaction (ORR), with a half-wave potential of 0.84 V (vs. RHE) and enhanced limiting current density of 6 mA cm−2 in 0.1 M KOH, outperforming commercial Pt/C (0.84 V vs. RHE and 5.1 mA cm−2). Furthermore, the catalyst exhibited outstanding catalytic performance for oxygen evolution reaction (OER), with a low overpotential of 299 mV at the current density of 10 mA cm−2 in 1 M KOH. This work opens up a new avenue to prepare highly effective, low cost and bifunctional electrocatalysts for sustainable energy applications.

Graphical abstract: Ultrafine NiCoP-decorated N,S,P-codoped hierarchical porous carbon nanosheets as an efficient bifunctional electrocatalyst for oxygen reduction and oxygen evolution

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Publication details

The article was received on 13 Jun 2019, accepted on 25 Jun 2019 and first published on 27 Jun 2019


Article type: Research Article
DOI: 10.1039/C9QM00385A
Mater. Chem. Front., 2019, Advance Article

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    Ultrafine NiCoP-decorated N,S,P-codoped hierarchical porous carbon nanosheets as an efficient bifunctional electrocatalyst for oxygen reduction and oxygen evolution

    H. Niu, A. Wang, L. Zhang, J. Guo and J. Feng, Mater. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QM00385A

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