Ultrafine Co:FeS<sub>2</sub>/CoS<sub>2</sub> Heterostructure Nanowires for Highly Efficient Hydrogen Evolution Reaction

Yan, Shancheng; Ka, Wang; Zhou, Fei; Lin, Shuren; Song, Haizeng; Shi, Yi; Yao, Jie

doi:10.1021/acsaem.9b01769

Cited by 36 publications

(17 citation statements)

References 47 publications

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“…There are also some peaks corresponding to CoS 2 (JCPDS#41-1471) [25][26][27], and bare carbon fiber shows peak located at 26.4 • [28]. Compared with pure NiS 2 , these peak positions are shifted by 0.04 • after Co doping, which indicates that Co is doped into the NiS 2 phase [29].…”

Section: Resultsmentioning

confidence: 99%

Effect of Co Doping on Electrocatalytic Performance of Co-NiS2/CoS2 Heterostructures

et al. 2021

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There are abundant water resources in nature, and hydrogen production from electrolyzed water can be one of the main ways to obtain green and sustainable energy. Traditional water electrolysis uses precious metals as catalysts, but it is difficult to apply in massive volumes due to low reserves and high prices. It is still a challenge to develop hydrogen electrocatalysts with excellent performance but low cost to further improve the efficiency of hydrogen production. This article reported a potential candidate, the Co-NiS2/CoS2 (material is based on NiS2, and after Co doping, The NiS2/CoS2 heterostructure is formed) heterostructures, prepared by hydrothermal method with carbon paper as the substrate. In a 0.5 M sulfuric acid solution, the hydrogen evolution reaction with Co-NiS2/CoS2 as the electrode showed excellent catalytic performance. When the Co (Cobalt) doping concentration is increased to 27%, the overpotential is −133.3 mV, which is a drop of 81 mV compared with −214.3 mV when it is not doped. The heterostructure formed after doping also has good stability. After 800 CV cycles, the difference in overpotential is only 3 mV. The significant improvement of the catalytic performance can be attributed to the significant changes in the crystal structure and properties of the doped heterostructures, which provide an effective method for efficient electrocatalytic hydrogen production.

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Section: Resultsmentioning

confidence: 99%

Effect of Co Doping on Electrocatalytic Performance of Co-NiS2/CoS2 Heterostructures

et al. 2021

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“…Figure 8b presents Tafel curves for all the synthesized electrodes. The Tafel slope is a crucial indication of reaction kinetics and rate in the HER process 57 . In other words, it is an intrinsic factor for the assessment of the rate-determining steps in the course of HER 58 .…”

Section: Resultsmentioning

confidence: 99%

Metal doped layered MgB2 nanoparticles as novel electrocatalysts for water splitting

Sadeghi

Peighambardoust

Khatamian

et al. 2021

Sci Rep

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Growing environmental problems along with the galloping rate of population growth have raised an unprecedented challenge to look for an ever-lasting alternative source of energy for fossil fuels. The eternal quest for sustainable energy production strategies has culminated in the electrocatalytic water splitting process integrated with renewable energy resources. The successful accomplishment of this process is thoroughly subject to competent, earth-abundant, and low-cost electrocatalysts to drive the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), preferably, in the same electrolyte. The present contribution has been dedicated to studying the synthesis, characterization, and electrochemical properties of newfangled electrocatalysts with the formal composition of Mg1−xTMxB2 (x = 0.025, 0.05, and 0.1; TM (transition metal) = Fe and Co) primarily in HER as well as OER under 1 M KOH medium. The electrochemical tests revealed that among all the metal-doped MgB2 catalysts, Mg0.95Co0.05B2 has the best HER performance showing an overpotential of 470 mV at − 10 mA cm−2 and a Tafel slope of 80 mV dec−1 on account of its high purity and fast electron transport. Further investigation shed some light on the fact that Fe concentration and overpotential for HER have adverse relation meaning that the highest amount of Fe doping (x = 0.1) displayed the lowest overpotential. This contribution introduces not only highly competent electrocatalysts composed of low-cost precursors for the water-splitting process but also a facile scalable method for the assembly of highly porous electrodes paving the way for further stunning developments in the field.

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“…Figure 7b presents Tafel curves for all the synthesized electrodes. The Tafel slope is a crucial indication of reaction kinetics and rate in the HER process 51 . In other words, it is an intrinsic factor for the assessment of the rate-determining steps in the course of HER 52 .…”

Section: Resultsmentioning

confidence: 99%

Metal Doped Layered MgB2 Nanoparticles as Novel Electrocatalysts for Water Splitting

Sadeghi

Peighambardoust

Khatamian

et al. 2020

Preprint

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Growing environmental problems along with the galloping rate of population growth have raised an unprecedented challenge to look for an ever-lasting alternative source of energy for fossil fuels. The eternal quest for sustainable energy production strategies has culminated in the electrocatalytic water splitting process integrated with renewable energy resources. The successful accomplishment of this process is thoroughly subject to highly efficient, earth-abundant, and cost-effective electrocatalysts to drive the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), preferably, in the same electrolyte. The present contribution has been dedicated to studying the synthesis, characterization, and electrochemical properties of newfangled electrocatalysts with the formal composition of Mg1-xTmxB2 (x = 0.025, 0.05, and 0.1; Tm (transition metal) = Fe and Co) primarily in HER as well as OER under 1 M KOH medium. The electrochemical tests revealed that among all the metal-doped MgB2 catalysts, Mg0.95Co0.05B2 has the best HER performance showing an overpotential of 470 mV at -10 mA cm-2 and a Tafel slope of 80 mV dec-1 on account of its high purity and fast electron transport. Further investigation shed some light on the fact that Fe concentration and overpotential for HER have adverse relation meaning that the highest amount of Fe doping (x = 0.1) displayed the lowest overpotential. This contribution introduces not only highly competent electrocatalysts composed of low-cost precursors for the water-splitting process but also a facile scalable method for the assembly of highly porous electrodes paving the way for further stunning developments in the field.

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Ultrafine Co:FeS₂/CoS₂ Heterostructure Nanowires for Highly Efficient Hydrogen Evolution Reaction

Cited by 36 publications

References 47 publications

Effect of Co Doping on Electrocatalytic Performance of Co-NiS2/CoS2 Heterostructures

Effect of Co Doping on Electrocatalytic Performance of Co-NiS2/CoS2 Heterostructures

Metal doped layered MgB2 nanoparticles as novel electrocatalysts for water splitting

Metal Doped Layered MgB2 Nanoparticles as Novel Electrocatalysts for Water Splitting

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Ultrafine Co:FeS2/CoS2 Heterostructure Nanowires for Highly Efficient Hydrogen Evolution Reaction

Cited by 36 publications

References 47 publications

Effect of Co Doping on Electrocatalytic Performance of Co-NiS2/CoS2 Heterostructures

Effect of Co Doping on Electrocatalytic Performance of Co-NiS2/CoS2 Heterostructures

Metal doped layered MgB2 nanoparticles as novel electrocatalysts for water splitting

Metal Doped Layered MgB2 Nanoparticles as Novel Electrocatalysts for Water Splitting

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Ultrafine Co:FeS₂/CoS₂ Heterostructure Nanowires for Highly Efficient Hydrogen Evolution Reaction