Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 878, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.160388
Keywords
Mn-doped; Oxygen evolution reaction; 3D network porous nanostructure; Outstanding stability
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Funding
- Natural Science Foundation of Hubei Province [2019CFB569]
- Science and Technology Foundation for Creative Research Group of Hubei Normal University [2019CZ08]
- Science and Technology Research Project of the Hubei Provincial Department of Education [Q20192503]
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The development of a 3D porous nanosphere Mn-NiCo2S4/NF catalyst with simple Mn doping strategy leads to good OER electrocatalytic performance and outstanding stability. The catalyst only requires a small overpotential and exhibits incredible corrosion resistance in 1 M KOH solution, showcasing potential for low-cost, efficient, and corrosion resistant transition metal electrocatalysts for oxygen evolution.
The development of self-supported nanosheet materials with porous multiple active sites has enormous potential for the application of oxygen evolution reaction (OER). Herein, we reported a three-dimensional (3D) porous nanosphere Mn-NiCo2S4/NF catalyst for OER. As a result, the simple Mn doping strategy results in good electrocatalytic performance and outstanding stability. During the OER, the Mn-NiCo2S4/NF only needs a small overpotential of 220 mV (40 mV lower than pure NiCo2S4/NF) to achieve the current density of 10 mA cm(-2), which is mainly due to a large number of exposed active sites and adequate pathways for mass diffusion and oxygen gas release. Moreover, Mn doping optimizes the electronic structure and thus facilitates electron transport, leading to superior electrocatalytic performance. The catalyst exhibits incredible corrosion resistance in 1 M KOH solution for 60 h or more. This work provides a valuable method to synthesize a low cost, high-efficiency, and corrosion resistant transition metal electrocatalyst for oxygen evolution using heteroatom doping strategy. (C) 2021 Elsevier B.V. All rights reserved.
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