Functional Nickel Oxide Nanostructures for Ethanol Oxidation in Alkaline Media

Document identifier: oai:DiVA.org:ltu-77972
Access full text here:10.1002/elan.201900662
Keyword: Natural Sciences, Physical Sciences, Other Physics Topics, Naturvetenskap, Fysik, Annan fysik, NiO nanostructures, (OH−) ion source, Ethanol oxidation, Alkaline media, Experimentell fysik, Experimental Physics
Publication year: 2020
Relevant Sustainable Development Goals (SDGs):
SDG 7 Affordable and clean energySDG 3 Good health and wellbeing
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

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).

Authors

Sidra Amin

Luleå tekniska universitet; Materialvetenskap; National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan. Department of Chemistry, Shaheed Benazir Bhutto University, Shaheed Benazirabad, Sindh Pakistan
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Aneela Tahira

Luleå tekniska universitet; Materialvetenskap
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Amber R. Solangi

National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan
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Raffaello Mazzaro

Luleå tekniska universitet; Materialvetenskap; Institute for Microelectronics and Microsystems, National Research Council, Bologna, Italy
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Zafar Hussain Ibupoto

Luleå tekniska universitet; Materialvetenskap; Institute of Chemistry, University of Sindh, Jamshoro, Sindh Pakistan
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Almas Fatima

National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan
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Alberto Vomiero

Luleå tekniska universitet; Materialvetenskap; Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy
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