Hierarchical construction of hollow NiCo<inf>2</inf>S<inf>4</inf> nanotube@NiCo<inf>2</inf>S<inf>4</inf> nanosheet arrays on Ni foam as an efficient and durable electrocatalyst for hydrogen evolution reaction

Bai, L; Song, A; Lei, X; Zhang, T; Song, S; Tian, H; Liu, H; Qin, X; Wang, G; Shao, G

Hierarchical construction of hollow NiCo<inf>2</inf>S<inf>4</inf> nanotube@NiCo<inf>2</inf>S<inf>4</inf> nanosheet arrays on Ni foam as an efficient and durable electrocatalyst for hydrogen evolution reaction

Bai, L Song, A Lei, X Zhang, T Song, S Tian, H

Liu, H

Qin, X Wang, G Shao, G

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: International Journal of Hydrogen Energy, 2022, 47, (91), pp. 38524-38532
Issue Date:: 2022-11-15

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Field	Value	Language
dc.contributor.author	Bai, L
dc.contributor.author	Song, A
dc.contributor.author	Lei, X
dc.contributor.author	Zhang, T
dc.contributor.author	Song, S
dc.contributor.author	Tian, H https://orcid.org/0000-0002-9581-0027
dc.contributor.author	Liu, H https://orcid.org/0000-0003-0266-9472
dc.contributor.author	Qin, X
dc.contributor.author	Wang, G
dc.contributor.author	Shao, G
dc.date.accessioned	2023-06-05T04:24:51Z
dc.date.available	2023-06-05T04:24:51Z
dc.date.issued	2022-11-15
dc.identifier.citation	International Journal of Hydrogen Energy, 2022, 47, (91), pp. 38524-38532
dc.identifier.issn	0360-3199
dc.identifier.issn	1879-3487
dc.identifier.uri	http://hdl.handle.net/10453/170636
dc.description.abstract	Ternary transition metal chalcogenide (TTMC) with multicomponent, different phases and unique electronic structures have been studied in electrocatalytic hydrogen evolution reaction (HER). However, the strong interaction between adsorbed H (H∗) and sulfur leads to the unfavorable hydrogen desorption properties of considerable TTMC. Herein, we constructed the hierarchical hollow NiCo2S4 nanotube@NiCo2S4 nanosheet arrays on Ni foam substrate (NT-NiCo2S4@NS-NiCo2S4/NF) by ion-exchange method. Homogeneous anion diffusion facilitates the formation of regular ultrathin nanosheets on hollow NiCo2S4 nanotube arrays, which presents hierarchical architecture with more surface area and channels to active site exposure, electrolyte diffusion, and gas desorption for HER. As-synthesized optimal NT-NiCo2S4@NS-NiCo2S4/NF electrode demonstrates an excellent HER activity, especially an overpotential of 221 mV, a Tafel slope of 108 mV dec−1, and remarkable stability at current densities of 100 mA cm−2 in 1.0 M NaOH electrolyte.
dc.language	English
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	International Journal of Hydrogen Energy
dc.relation.isbasedon	10.1016/j.ijhydene.2022.09.020
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Energy
dc.title	Hierarchical construction of hollow NiCo<inf>2</inf>S<inf>4</inf> nanotube@NiCo<inf>2</inf>S<inf>4</inf> nanosheet arrays on Ni foam as an efficient and durable electrocatalyst for hydrogen evolution reaction
dc.type	Journal Article
utslib.citation.volume	47
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	closed_access	*
dc.date.updated	2023-06-05T04:24:49Z
pubs.issue	91
pubs.publication-status	Published
pubs.volume	47
utslib.citation.issue	91

Abstract:

Ternary transition metal chalcogenide (TTMC) with multicomponent, different phases and unique electronic structures have been studied in electrocatalytic hydrogen evolution reaction (HER). However, the strong interaction between adsorbed H (H∗) and sulfur leads to the unfavorable hydrogen desorption properties of considerable TTMC. Herein, we constructed the hierarchical hollow NiCo2S4 nanotube@NiCo2S4 nanosheet arrays on Ni foam substrate (NT-NiCo2S4@NS-NiCo2S4/NF) by ion-exchange method. Homogeneous anion diffusion facilitates the formation of regular ultrathin nanosheets on hollow NiCo2S4 nanotube arrays, which presents hierarchical architecture with more surface area and channels to active site exposure, electrolyte diffusion, and gas desorption for HER. As-synthesized optimal NT-NiCo2S4@NS-NiCo2S4/NF electrode demonstrates an excellent HER activity, especially an overpotential of 221 mV, a Tafel slope of 108 mV dec−1, and remarkable stability at current densities of 100 mA cm−2 in 1.0 M NaOH electrolyte.

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http://hdl.handle.net/10453/170636