One-step preparation of cobalt-doped NiS@MoS2 core-shell nanorods as bifunctional electrocatalyst for overall water splitting

Published on May 1, 2021in Electrochimica Acta6.901
· DOI :10.1016/J.ELECTACTA.2021.138051
Hongwei Gao12
Estimated H-index: 12
(Yanshan University),
Jianbing Zang22
Estimated H-index: 22
(Yanshan University)
+ 5 AuthorsWei Li16
Estimated H-index: 16
(Yanshan University)
Sources
Abstract
Abstract Development of transition metal-based catalysts to replace precious metal catalysts has significant meaning for overall water splitting. Here, we prepared cobalt-doped NiS@MoS2 core-shell nanorods (Co-NiS@MoS2) as bifunctional catalyst through a simple one-step hydrothermal method. Co-NiS@MoS2 catalyst could achieve brilliant electrocatalytic performance for hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and overall water splitting. And Co-NiS@MoS2 catalyst manifested small overpotentials at 50 mA cm−2 for both HER (139.9 mV) and OER (170.6 mV) catalytic performance in 1 M KOH solution. In addition, it displayed a cell voltage of 1.54 V at 50 mA cm−2 for overall water splitting, which is comparable with or surpasses the reported catalysts in the literatures. And Co-NiS@MoS2 catalyst had superior stabilities for HER, OER and overall water splitting in 1 M KOH due to its unique core-shell structure and synergistic effects of NiS nanorods and MoS2 nanosheets.
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References45
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#1Wei Liu (LYU: Linyi University)H-Index: 2
#2Hongxiu Zhang (LYU: Linyi University)H-Index: 2
Last. Xingwang Zhang (ZJU: Zhejiang University)H-Index: 39
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#1Rushuo Li (Yanshan University)H-Index: 3
#2Jianbing Zang (Yanshan University)H-Index: 22
Last. Yanhui Wang (Yanshan University)H-Index: 23
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Developing low-cost electrocatalysts with superior activity and durability for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) poses a huge challenge to water splitting. Herein, a simple and scalable strategy was proposed to fabricate three-dimensional (3D) heteronanorods on nickel foam, of which the nickel-molybdenum phosphide nanorods were covered with cobalt-iron phosphides (P-NM-CF HNRs). Based on the rational design, P-NM-CF HNRs exhibited large surface area, tigh...
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Abstract null null The property of an active material is not only influenced by its morphology and size, but also by its crystal phase. The present phase regulation of nickel sulfide is mainly achieved by controlling the participation of sulfur source in reaction. Thus, new perspectives direct at phase control need to be explored and supplemented. Herein, we proposed a novel coordination agent-dominated phase modulation strategy assisted by a hydrothermal process. It is found that increasing the...
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#9Qing Li (SWU: Southwest University)H-Index: 36
Abstract null null Ni3S2 and NiS supported on carbon spheres are successfully synthesized by a facile hydrothermal method. And then a series of physical characterizations included XRD (X-ray diffraction), EDS (energy dispersive spectroscopy), FESEM (field emission scanning electron microscopy) and XPS (X-ray photo-electron spectroscopy) were used to analyze the samples. XRD was used to confirm that Ni3S2 and NiS were successfully fabricated. FESEM indicated that Ni3S2 and NiS disperse well on ca...
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