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Functional Nickel Oxide Nanostructures for Ethanol Oxidation in Alkaline Media
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan. Department of Chemistry, Shaheed Benazir Bhutto University, Shaheed Benazirabad, Sindh Pakistan.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-6777-5642
National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Institute for Microelectronics and Microsystems, National Research Council, Bologna, Italy.ORCID iD: 0000-0003-4598-9556
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2020 (English)In: Electroanalysis, ISSN 1040-0397, E-ISSN 1521-4109, Vol. 32, no 5, p. 1052-1059Article in journal (Refereed) Published
Abstract [en]

Nickel oxide (NiO) nanostructures are employed in the basic medium for the oxidation of ethanol. A variety of NiO nanostructures are synthesized by wet chemical growth method, using different hydroxide (OH−) ion sources, particularly from ammonia, hexamethylenetetramine, urea and sodium hydroxide. The use of urea as (OH−) ion source results in flower‐like NiO structures composed by extremely thin nanowalls (thickness lower than 10 nm,), which demonstrated to be the most active for ethanol oxidation. All the samples exhibit NiO cubic phase, and no other impurity was detected. The cyclic voltammetry (CV) curves of NiO nanostructures were found linear over the concentration range 0.1–3.5 mM (R2=0.99) of ethanol, with the limit of detection estimated to be 0.013 mM for ethanol. The NiO nanostructures exhibit a selective signal towards ethanol oxidation in the presence of different members of alcohol family. The proposed NiO nanostructures showed a significant practicality for the reproducible and sensitive determination of ethanol from brandy, whisky, mixture of brandy and rum, and vodka samples. The nanomaterial was used as a surface modifying agent for the glassy carbon electrode and it showed a stable electro‐oxidation activity for the ethanol for 16 days. These findings indicate that the presented NiO nanomaterial can be applied in place of noble metals for ethanol sensing and other environmental applications (like fuel cells).

Place, publisher, year, edition, pages
John Wiley & Sons, 2020. Vol. 32, no 5, p. 1052-1059
Keywords [en]
NiO nanostructures, (OH−) ion source, ethanol oxidation, alkaline media
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Experimental Physics
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URN: urn:nbn:se:ltu:diva-77972DOI: 10.1002/elan.201900662ISI: 000507436500001Scopus ID: 2-s2.0-85078019459OAI: oai:DiVA.org:ltu-77972DiVA, id: diva2:1412327
Note

Validerad;2020;Nivå 2;2020-05-26 (alebob)

Available from: 2020-03-05 Created: 2020-03-05 Last updated: 2022-10-27Bibliographically approved

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Tahira, AneelaMazzaro, RaffaelloIbupoto, Zafar HussainVomiero, Alberto

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