Efficient OER nanocomposite electrocatalysts based on Ni and/or Co supported on MoSe2 nanoribbons and MoS2 nanosheets

It is well known that the benchmark electrocatalysts for OER in alkaline solution are RuO2 and IrO2; however, the high cost, scarcity, and instability of these metal oxides impede their ample use in OER processes, and this has fueled the search for cheap Earth-abundant elements which are equally eff...

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Autores principales:	Bibiana K. Martini, Leticia S. Bezerra, Sofya Artemkina, Vladimir Fedorov, Purna K. Boruah, Manash R. Das, Gilberto Maia
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Oer Nanocomposites Nanosheets Nanoribbons Ni Co Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/d2cf7e752ab64ae5a350e95cb786558b
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spelling	oai:doaj.org-article:d2cf7e752ab64ae5a350e95cb786558b2021-11-30T04:17:53ZEfficient OER nanocomposite electrocatalysts based on Ni and/or Co supported on MoSe2 nanoribbons and MoS2 nanosheets2666-821110.1016/j.ceja.2021.100206https://doaj.org/article/d2cf7e752ab64ae5a350e95cb786558b2022-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121001216https://doaj.org/toc/2666-8211It is well known that the benchmark electrocatalysts for OER in alkaline solution are RuO2 and IrO2; however, the high cost, scarcity, and instability of these metal oxides impede their ample use in OER processes, and this has fueled the search for cheap Earth-abundant elements which are equally efficient for application as electrocatalysts in OER. The present work reports the use of hydrothermal and calcination methods for the synthesis of nanocomposites made up of Ni and/or Co salts and urea in combination with MoSe2 and MoS2 and their application as efficient and stable electrocatalysts for OER in alkaline solution. The NiCoMoSe, NiCoMo, CoMoSeS, and CoMo nanocomposites constructed in the present study presented high OER electrocatalytic activity and stability mainly as a result of the following: the combination of N atoms bonded to Ni and/or Co (and Mo); the electrons released from the oxidation of Co from the 2+ to 3+state, Ni oxidation from the 2+ to 3+state, and Mo oxidation from the 4+ to 6+state; and the metal oxides (CoMoO4, NiCo2O4, Co2Mo3O8, and Co3O4) supported on MoS2 nanosheets and MoSe2 nanoribbons which contributed to a decrease in charge transfer resistance, apart from keeping the ECSA values relatively low.Bibiana K. MartiniLeticia S. BezerraSofya ArtemkinaVladimir FedorovPurna K. BoruahManash R. DasGilberto MaiaElsevierarticleOerNanocompositesNanosheetsNanoribbonsNiCoChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 9, Iss , Pp 100206- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Oer Nanocomposites Nanosheets Nanoribbons Ni Co Chemical engineering TP155-156
spellingShingle	Oer Nanocomposites Nanosheets Nanoribbons Ni Co Chemical engineering TP155-156 Bibiana K. Martini Leticia S. Bezerra Sofya Artemkina Vladimir Fedorov Purna K. Boruah Manash R. Das Gilberto Maia Efficient OER nanocomposite electrocatalysts based on Ni and/or Co supported on MoSe2 nanoribbons and MoS2 nanosheets
description	It is well known that the benchmark electrocatalysts for OER in alkaline solution are RuO2 and IrO2; however, the high cost, scarcity, and instability of these metal oxides impede their ample use in OER processes, and this has fueled the search for cheap Earth-abundant elements which are equally efficient for application as electrocatalysts in OER. The present work reports the use of hydrothermal and calcination methods for the synthesis of nanocomposites made up of Ni and/or Co salts and urea in combination with MoSe2 and MoS2 and their application as efficient and stable electrocatalysts for OER in alkaline solution. The NiCoMoSe, NiCoMo, CoMoSeS, and CoMo nanocomposites constructed in the present study presented high OER electrocatalytic activity and stability mainly as a result of the following: the combination of N atoms bonded to Ni and/or Co (and Mo); the electrons released from the oxidation of Co from the 2+ to 3+state, Ni oxidation from the 2+ to 3+state, and Mo oxidation from the 4+ to 6+state; and the metal oxides (CoMoO4, NiCo2O4, Co2Mo3O8, and Co3O4) supported on MoS2 nanosheets and MoSe2 nanoribbons which contributed to a decrease in charge transfer resistance, apart from keeping the ECSA values relatively low.
format	article
author	Bibiana K. Martini Leticia S. Bezerra Sofya Artemkina Vladimir Fedorov Purna K. Boruah Manash R. Das Gilberto Maia
author_facet	Bibiana K. Martini Leticia S. Bezerra Sofya Artemkina Vladimir Fedorov Purna K. Boruah Manash R. Das Gilberto Maia
author_sort	Bibiana K. Martini
title	Efficient OER nanocomposite electrocatalysts based on Ni and/or Co supported on MoSe2 nanoribbons and MoS2 nanosheets
title_short	Efficient OER nanocomposite electrocatalysts based on Ni and/or Co supported on MoSe2 nanoribbons and MoS2 nanosheets
title_full	Efficient OER nanocomposite electrocatalysts based on Ni and/or Co supported on MoSe2 nanoribbons and MoS2 nanosheets
title_fullStr	Efficient OER nanocomposite electrocatalysts based on Ni and/or Co supported on MoSe2 nanoribbons and MoS2 nanosheets
title_full_unstemmed	Efficient OER nanocomposite electrocatalysts based on Ni and/or Co supported on MoSe2 nanoribbons and MoS2 nanosheets
title_sort	efficient oer nanocomposite electrocatalysts based on ni and/or co supported on mose2 nanoribbons and mos2 nanosheets
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/d2cf7e752ab64ae5a350e95cb786558b
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Efficient OER nanocomposite electrocatalysts based on Ni and/or Co supported on MoSe2 nanoribbons and MoS2 nanosheets

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