Textured NiSe2 Film: Bifunctional Electrocatalyst for Full Water Splitting at Remarkably Low Overpotential with High Energy Efficiency

Abstract Herein we have shown that electrodeposited NiSe2 can be used as a bifunctional electrocatalyst under alkaline conditions to split water at very low potential by catalyzing both oxygen evolution and hydrogen evolution reactions at anode and cathode, respectively, achieving a very high electr...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Abdurazag T. Swesi, Jahangir Masud, Wipula P. R. Liyanage, Siddesh Umapathi, Eric Bohannan, Julia Medvedeva, Manashi Nath
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2017
Materias:
R
Q
Acceso en línea:https://doaj.org/article/a8140dd58614487c95c75d4a8f06eab2
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:a8140dd58614487c95c75d4a8f06eab2
record_format dspace
spelling oai:doaj.org-article:a8140dd58614487c95c75d4a8f06eab22021-12-02T16:07:58ZTextured NiSe2 Film: Bifunctional Electrocatalyst for Full Water Splitting at Remarkably Low Overpotential with High Energy Efficiency10.1038/s41598-017-02285-z2045-2322https://doaj.org/article/a8140dd58614487c95c75d4a8f06eab22017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02285-zhttps://doaj.org/toc/2045-2322Abstract Herein we have shown that electrodeposited NiSe2 can be used as a bifunctional electrocatalyst under alkaline conditions to split water at very low potential by catalyzing both oxygen evolution and hydrogen evolution reactions at anode and cathode, respectively, achieving a very high electrolysis energy efficiency exceeding 80% at considerably high current densities (100 mA cm−2). The OER catalytic activity as well as electrolysis energy efficiency surpasses any previously reported OER electrocatalyst in alkaline medium and energy efficiency of an electrolyzer using state-of-the-art Pt and RuO2 as the HER and OER catalyst, respectively. Through detailed electrochemical and structural characterization, we have shown that the enhanced catalytic activity is attributed to directional growth of the electrodeposited film that exposes a Ni-rich lattice plane as the terminating plane, as well as increased covalency of the selenide lattice which decreases the Ni(II) to Ni(III) oxidation potential. Thereby, the high efficiency along with extended stability makes NiSe2 as the most efficient water electrolyzer known to-date.Abdurazag T. SwesiJahangir MasudWipula P. R. LiyanageSiddesh UmapathiEric BohannanJulia MedvedevaManashi NathNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Abdurazag T. Swesi
Jahangir Masud
Wipula P. R. Liyanage
Siddesh Umapathi
Eric Bohannan
Julia Medvedeva
Manashi Nath
Textured NiSe2 Film: Bifunctional Electrocatalyst for Full Water Splitting at Remarkably Low Overpotential with High Energy Efficiency
description Abstract Herein we have shown that electrodeposited NiSe2 can be used as a bifunctional electrocatalyst under alkaline conditions to split water at very low potential by catalyzing both oxygen evolution and hydrogen evolution reactions at anode and cathode, respectively, achieving a very high electrolysis energy efficiency exceeding 80% at considerably high current densities (100 mA cm−2). The OER catalytic activity as well as electrolysis energy efficiency surpasses any previously reported OER electrocatalyst in alkaline medium and energy efficiency of an electrolyzer using state-of-the-art Pt and RuO2 as the HER and OER catalyst, respectively. Through detailed electrochemical and structural characterization, we have shown that the enhanced catalytic activity is attributed to directional growth of the electrodeposited film that exposes a Ni-rich lattice plane as the terminating plane, as well as increased covalency of the selenide lattice which decreases the Ni(II) to Ni(III) oxidation potential. Thereby, the high efficiency along with extended stability makes NiSe2 as the most efficient water electrolyzer known to-date.
format article
author Abdurazag T. Swesi
Jahangir Masud
Wipula P. R. Liyanage
Siddesh Umapathi
Eric Bohannan
Julia Medvedeva
Manashi Nath
author_facet Abdurazag T. Swesi
Jahangir Masud
Wipula P. R. Liyanage
Siddesh Umapathi
Eric Bohannan
Julia Medvedeva
Manashi Nath
author_sort Abdurazag T. Swesi
title Textured NiSe2 Film: Bifunctional Electrocatalyst for Full Water Splitting at Remarkably Low Overpotential with High Energy Efficiency
title_short Textured NiSe2 Film: Bifunctional Electrocatalyst for Full Water Splitting at Remarkably Low Overpotential with High Energy Efficiency
title_full Textured NiSe2 Film: Bifunctional Electrocatalyst for Full Water Splitting at Remarkably Low Overpotential with High Energy Efficiency
title_fullStr Textured NiSe2 Film: Bifunctional Electrocatalyst for Full Water Splitting at Remarkably Low Overpotential with High Energy Efficiency
title_full_unstemmed Textured NiSe2 Film: Bifunctional Electrocatalyst for Full Water Splitting at Remarkably Low Overpotential with High Energy Efficiency
title_sort textured nise2 film: bifunctional electrocatalyst for full water splitting at remarkably low overpotential with high energy efficiency
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/a8140dd58614487c95c75d4a8f06eab2
work_keys_str_mv AT abdurazagtswesi texturednise2filmbifunctionalelectrocatalystforfullwatersplittingatremarkablylowoverpotentialwithhighenergyefficiency
AT jahangirmasud texturednise2filmbifunctionalelectrocatalystforfullwatersplittingatremarkablylowoverpotentialwithhighenergyefficiency
AT wipulaprliyanage texturednise2filmbifunctionalelectrocatalystforfullwatersplittingatremarkablylowoverpotentialwithhighenergyefficiency
AT siddeshumapathi texturednise2filmbifunctionalelectrocatalystforfullwatersplittingatremarkablylowoverpotentialwithhighenergyefficiency
AT ericbohannan texturednise2filmbifunctionalelectrocatalystforfullwatersplittingatremarkablylowoverpotentialwithhighenergyefficiency
AT juliamedvedeva texturednise2filmbifunctionalelectrocatalystforfullwatersplittingatremarkablylowoverpotentialwithhighenergyefficiency
AT manashinath texturednise2filmbifunctionalelectrocatalystforfullwatersplittingatremarkablylowoverpotentialwithhighenergyefficiency
_version_ 1718384676895195136