Boron leaching: Creating vacancy-rich Ni for enhanced hydrogen evolution

Han, C; Li, W; Wang, J; Huang, Z

Boron leaching: Creating vacancy-rich Ni for enhanced hydrogen evolution

Han, C Li, W Wang, J Huang, Z

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Publisher:: Springer Science and Business Media LLC
Publication Type:: Journal Article
Citation:: Nano Research, 2021, pp. 1-6
Issue Date:: 2021-01-01

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Field	Value	Language
dc.contributor.author	Han, C
dc.contributor.author	Li, W
dc.contributor.author	Wang, J
dc.contributor.author	Huang, Z https://orcid.org/0000-0003-1985-0884
dc.date.accessioned	2021-10-10T10:07:25Z
dc.date.available	2021-10-10T10:07:25Z
dc.date.issued	2021-01-01
dc.identifier.citation	Nano Research, 2021, pp. 1-6
dc.identifier.issn	1998-0124
dc.identifier.issn	1998-0000
dc.identifier.uri	http://hdl.handle.net/10453/150961
dc.description.abstract	Creating vacancy is often highly effective in enhancing the hydrogen evolution performance of transition metal-based catalysts. Vacancy-rich Ni nanosheets have been fabricated via topochemical formation of two-dimentional (2D) Ni2B on graphene precursor followed by boron leaching. Anchored on graphene, a few atomic layered Ni2B nanosheets are first obtained by reduction and annealing. Large number of atomic vacancies are then generated in the Ni2B layer via leaching boron atoms. When used for hydrogen evolution reaction (HER), the vacancy-rich Ni/Ni(OH)2 heterostructure nanosheets demonstrate remarkable performance with a low overpotential of 159 mV at a current density of 10 mA·cm−2 in alkaline solution, a dramatic improvement over 262 mV of its precursor. This enhancement is associated with the formation of vacancies which introduce more active sites for HER along Ni/Ni(OH)2 heterointerfaces. This work offers a facile and universal route to introduce vacancies and improve catalytic activity. [Figure not available: see fulltext.]
dc.language	en
dc.publisher	Springer Science and Business Media LLC
dc.relation	http://purl.org/au-research/grants/arc/FT190100658
dc.relation	http://purl.org/au-research/grants/arc/DP170101773
dc.relation.ispartof	Nano Research
dc.relation.isbasedon	10.1007/s12274-021-3787-z
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Boron leaching: Creating vacancy-rich Ni for enhanced hydrogen evolution
dc.type	Journal Article
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2022-01-01T00:00:00+1000Z
dc.date.updated	2021-10-10T10:07:20Z
pubs.publication-status	Published

Abstract:

Creating vacancy is often highly effective in enhancing the hydrogen evolution performance of transition metal-based catalysts. Vacancy-rich Ni nanosheets have been fabricated via topochemical formation of two-dimentional (2D) Ni2B on graphene precursor followed by boron leaching. Anchored on graphene, a few atomic layered Ni2B nanosheets are first obtained by reduction and annealing. Large number of atomic vacancies are then generated in the Ni2B layer via leaching boron atoms. When used for hydrogen evolution reaction (HER), the vacancy-rich Ni/Ni(OH)2 heterostructure nanosheets demonstrate remarkable performance with a low overpotential of 159 mV at a current density of 10 mA·cm−2 in alkaline solution, a dramatic improvement over 262 mV of its precursor. This enhancement is associated with the formation of vacancies which introduce more active sites for HER along Ni/Ni(OH)2 heterointerfaces. This work offers a facile and universal route to introduce vacancies and improve catalytic activity. [Figure not available: see fulltext.]

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http://hdl.handle.net/10453/150961