Direct solvent free synthesis of bare α-NiS, β-NiS and α-β-NiS composite as excellent electrocatalysts: Effect of self-capping on supercapacitance and overall water splitting activity

Abstract Nickel sulfide is regarded as a material with tremendous potential for energy storage and conversion applications. However, it exists in a variety of stable compositions and obtaining a pure phase is a challenge. This study demonstrates a potentially scalable, solvent free and phase selecti...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ginena Bildard Shombe, Malik Dilshad Khan, Camila Zequine, Chen Zhao, Ram K. Gupta, Neerish Revaprasadu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/922b9d8b9abf4a579724ecab41057ee6
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:922b9d8b9abf4a579724ecab41057ee6
record_format	dspace
spelling	oai:doaj.org-article:922b9d8b9abf4a579724ecab41057ee62021-12-02T14:28:21ZDirect solvent free synthesis of bare α-NiS, β-NiS and α-β-NiS composite as excellent electrocatalysts: Effect of self-capping on supercapacitance and overall water splitting activity10.1038/s41598-020-59714-92045-2322https://doaj.org/article/922b9d8b9abf4a579724ecab41057ee62020-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-59714-9https://doaj.org/toc/2045-2322Abstract Nickel sulfide is regarded as a material with tremendous potential for energy storage and conversion applications. However, it exists in a variety of stable compositions and obtaining a pure phase is a challenge. This study demonstrates a potentially scalable, solvent free and phase selective synthesis of uncapped α-NiS, β-NiS and α-β-NiS composites using nickel alkyl (ethyl, octyl) xanthate precursors. Phase transformation and morphology were observed by powder-X-ray diffraction (p-XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The comparative efficiency of the synthesized samples was investigated for energy storage and generation applications, in which superior performance was observed for the NiS synthesized from the short chain xanthate complex. A high specific capacitance of 1,940 F/g, 2,150 F/g and 2,250 F/g was observed at 2 mV/s for bare α-NiS, β-NiS and α-β-NiS composite respectively. At high current density of 1 A/g, α-NiS showed the highest capacitance of 1,287 F/g, with 100% of Coulombic efficiency and 79% of capacitance retention. In the case of the oxygen evolution reaction (OER), β-NiS showed an overpotential of 139 mV at a current density of 10 mA/cm2, with a Tafel slope of only 32 mV/dec, showing a fast and efficient process. It was observed that the increase in carbon chain of the synthesized self-capped nickel sulfide nanoparticles decreased the overall efficiency, both for energy storage and energy generation applications.Ginena Bildard ShombeMalik Dilshad KhanCamila ZequineChen ZhaoRam K. GuptaNeerish RevaprasaduNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-14 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ginena Bildard Shombe Malik Dilshad Khan Camila Zequine Chen Zhao Ram K. Gupta Neerish Revaprasadu Direct solvent free synthesis of bare α-NiS, β-NiS and α-β-NiS composite as excellent electrocatalysts: Effect of self-capping on supercapacitance and overall water splitting activity
description	Abstract Nickel sulfide is regarded as a material with tremendous potential for energy storage and conversion applications. However, it exists in a variety of stable compositions and obtaining a pure phase is a challenge. This study demonstrates a potentially scalable, solvent free and phase selective synthesis of uncapped α-NiS, β-NiS and α-β-NiS composites using nickel alkyl (ethyl, octyl) xanthate precursors. Phase transformation and morphology were observed by powder-X-ray diffraction (p-XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The comparative efficiency of the synthesized samples was investigated for energy storage and generation applications, in which superior performance was observed for the NiS synthesized from the short chain xanthate complex. A high specific capacitance of 1,940 F/g, 2,150 F/g and 2,250 F/g was observed at 2 mV/s for bare α-NiS, β-NiS and α-β-NiS composite respectively. At high current density of 1 A/g, α-NiS showed the highest capacitance of 1,287 F/g, with 100% of Coulombic efficiency and 79% of capacitance retention. In the case of the oxygen evolution reaction (OER), β-NiS showed an overpotential of 139 mV at a current density of 10 mA/cm2, with a Tafel slope of only 32 mV/dec, showing a fast and efficient process. It was observed that the increase in carbon chain of the synthesized self-capped nickel sulfide nanoparticles decreased the overall efficiency, both for energy storage and energy generation applications.
format	article
author	Ginena Bildard Shombe Malik Dilshad Khan Camila Zequine Chen Zhao Ram K. Gupta Neerish Revaprasadu
author_facet	Ginena Bildard Shombe Malik Dilshad Khan Camila Zequine Chen Zhao Ram K. Gupta Neerish Revaprasadu
author_sort	Ginena Bildard Shombe
title	Direct solvent free synthesis of bare α-NiS, β-NiS and α-β-NiS composite as excellent electrocatalysts: Effect of self-capping on supercapacitance and overall water splitting activity
title_short	Direct solvent free synthesis of bare α-NiS, β-NiS and α-β-NiS composite as excellent electrocatalysts: Effect of self-capping on supercapacitance and overall water splitting activity
title_full	Direct solvent free synthesis of bare α-NiS, β-NiS and α-β-NiS composite as excellent electrocatalysts: Effect of self-capping on supercapacitance and overall water splitting activity
title_fullStr	Direct solvent free synthesis of bare α-NiS, β-NiS and α-β-NiS composite as excellent electrocatalysts: Effect of self-capping on supercapacitance and overall water splitting activity
title_full_unstemmed	Direct solvent free synthesis of bare α-NiS, β-NiS and α-β-NiS composite as excellent electrocatalysts: Effect of self-capping on supercapacitance and overall water splitting activity
title_sort	direct solvent free synthesis of bare α-nis, β-nis and α-β-nis composite as excellent electrocatalysts: effect of self-capping on supercapacitance and overall water splitting activity
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/922b9d8b9abf4a579724ecab41057ee6
work_keys_str_mv	AT ginenabildardshombe directsolventfreesynthesisofbareanisbnisandabniscompositeasexcellentelectrocatalystseffectofselfcappingonsupercapacitanceandoverallwatersplittingactivity AT malikdilshadkhan directsolventfreesynthesisofbareanisbnisandabniscompositeasexcellentelectrocatalystseffectofselfcappingonsupercapacitanceandoverallwatersplittingactivity AT camilazequine directsolventfreesynthesisofbareanisbnisandabniscompositeasexcellentelectrocatalystseffectofselfcappingonsupercapacitanceandoverallwatersplittingactivity AT chenzhao directsolventfreesynthesisofbareanisbnisandabniscompositeasexcellentelectrocatalystseffectofselfcappingonsupercapacitanceandoverallwatersplittingactivity AT ramkgupta directsolventfreesynthesisofbareanisbnisandabniscompositeasexcellentelectrocatalystseffectofselfcappingonsupercapacitanceandoverallwatersplittingactivity AT neerishrevaprasadu directsolventfreesynthesisofbareanisbnisandabniscompositeasexcellentelectrocatalystseffectofselfcappingonsupercapacitanceandoverallwatersplittingactivity
_version_	1718391266359640064

Direct solvent free synthesis of bare α-NiS, β-NiS and α-β-NiS composite as excellent electrocatalysts: Effect of self-capping on supercapacitance and overall water splitting activity

Ejemplares similares