Electrodeposition-derived defect-rich heterogeneous trimetallic sulfide/hydroxide nanotubes/nanobelts for efficient electrocatalytic oxygen production
[Display omitted] •Heterogeneous Ni-Fe-Co-based nanotubes/nanobelts (nNFCS NTs/NBs) are fabricated.•The nNFCS catalyst for OER achieves an ultralow overpotential and Tafel slop.•The crystalline sulfide/amorphous hydroxide heterostructures enhance the catalytic activity.•The incorporation of Fe, Co,...
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Published in | Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 430; p. 133073 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
15.02.2022
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Subjects | |
Online Access | Get full text |
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Summary: | [Display omitted]
•Heterogeneous Ni-Fe-Co-based nanotubes/nanobelts (nNFCS NTs/NBs) are fabricated.•The nNFCS catalyst for OER achieves an ultralow overpotential and Tafel slop.•The crystalline sulfide/amorphous hydroxide heterostructures enhance the catalytic activity.•The incorporation of Fe, Co, Ni improves the catalytic activity.•One-dimensional NTs/NBs structure with rich defects boosts the catalytic activity.
Developing heterogeneous polymetallic sulfide/hydroxide nanotubes or nanobelts as highly efficient and noble-free electrocatalysts for oxygen evolution reaction (OER) with sluggish kinetics is rarely reported. Herein, defect-rich heterogeneous crystalline (Ni, Fe, Co)S2/amorphous NiFeCo(OH)y nanotubes/nanobelts (nNFCS NTs/NBs) are fabricated mainly by a facile cyclic voltammetry electrodeposition. By enriching exposing active sites and optimizing coordination environment via the construction of crystalline sulfide/amorphous hydroxide heterostructures, incorporation of Fe, Co, Ni, rich surface defects, and one-dimensional NTs/NBs structure, the nNFCS catalyst presents a fascinating OER electrocatalytic activity. Ultralow overpotentials of 193 and 225 mV at 10 and 150 mA cm−2, respectively, are achieved with a small Tafel slop of 36.9 mV dec−1, which excels most reported sulfide, hydroxide catalysts and IrO2. This work offers a significant guidance for designing advanced earth-abundant OER catalysts by incorporating several strategies of enriching surface defects and elevating catalytic activity properly. |
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ISSN: | 1385-8947 1873-3212 |
DOI: | 10.1016/j.cej.2021.133073 |