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Electrodeposition of nickel hydroxide nanoparticles on carbon nanotube electrodes : correlation of particle crystallography with electrocatalytic properties
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E, Sharel P., Liu, Danqing, Lazenby, Robert A., Sloan, Jeremy, Vidotti, Marcio, Unwin, Patrick R. and Macpherson, Julie V. (2016) Electrodeposition of nickel hydroxide nanoparticles on carbon nanotube electrodes : correlation of particle crystallography with electrocatalytic properties. The Journal of Physical Chemistry C, 120 (29). pp. 16059-16068. doi:10.1021/acs.jpcc.5b12741 ISSN 1932-7447.
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Official URL: http://dx.doi.org/10.1021/acs.jpcc.5b12741
Abstract
The use of two different electrodeposition approaches to form nickel hydroxide, Ni(OH)2, nanoparticles (NPs) of different crystallographic orientations on single-walled carbon nanotubes is demonstrated via: (i) the electrochemical generation of OH– (∼mM), in the presence of Ni2+, resulting in the formation of disordered α-phase Ni(OH)2 NPs by precipitation (direct approach); (ii) the electrodeposition of Ni NPs that are converted to Ni(OH)2 through potential cycling in alkaline media to form the more thermodynamically favorable, ordered β-phase Ni(OH)2 NPs (indirect approach). NPs produced by the direct approach exhibit remarkable electrocatalytic activity toward both methanol and ethanol oxidation, with excellent specific activities (SAs) of ∼2.8 kA g–1 for 0.5 M methanol and ∼3.7 kA g–1 for 0.5 M ethanol. In contrast, NPs produced by the indirect approach show SA values about an order of magnitude lower. This study demonstrates the capability of electrochemistry for the tailored synthesis of Ni(OH)2 nanostructures for electrocatalytic applications and a powerful, but simple, combinatorial approach for quick activity screening.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
Library of Congress Subject Headings (LCSH): | Electrocatalysis , Crystallography, Nanotubes, Nanoparticles | ||||||||
Journal or Publication Title: | The Journal of Physical Chemistry C | ||||||||
Publisher: | American Chemical Society | ||||||||
ISSN: | 1932-7447 | ||||||||
Official Date: | 27 May 2016 | ||||||||
Dates: |
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Volume: | 120 | ||||||||
Number: | 29 | ||||||||
Page Range: | pp. 16059-16068 | ||||||||
DOI: | 10.1021/acs.jpcc.5b12741 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 26 January 2017 | ||||||||
Date of first compliant Open Access: | 27 May 2017 | ||||||||
Funder: | European Research Council (ERC), Royal Society (Great Britain), University of Warwick Chancellor’s Interational Scholarship, China Scholarship Council (CSC), Brazil. Coordenação do Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Fundacao Araucária | ||||||||
Grant number: | ERC-2009-AdG247143-QUANTIF (ERC), 308/2014 (Fundacao Araucária) |
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