Staff View: Phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction

Phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction

Electrocatalytic water splitting is a promising solution to resolve the global energy crisis. Tuning the morphology and elemental composition is a crucial aspect in designing highly-efficient nanomaterials based electrocatalyst for water splitting. Herein, green synthesis using phytochemicals from a...

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Main Authors:	Sarkar D.K., Selvanathan V., Mottakin M., Islam M.A., Almohamadi H., Alharthi N.H., Akhtaruzzaman M.
Other Authors:	57220704093
Format:	Article
Published:	Elsevier Ltd 2025
Subjects:	Ascorbic acid Citric acid Cobalt compounds Copper oxides Electrocatalysts Electrodes Energy policy Metabolism Nanostructures Nickel oxide Oxygen Plants (botany) Sodium hydroxide Aloe vera Diethylamines Electrocatalytic Elemental compositions Energy crisis Global energy Green synthesis Nickel foam Phytochemical Water splitting Urea
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spelling	my.uniten.dspace-368052025-03-03T15:44:48Z Phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction Sarkar D.K. Selvanathan V. Mottakin M. Islam M.A. Almohamadi H. Alharthi N.H. Akhtaruzzaman M. 57220704093 57160057200 57195305487 57361246600 57196063818 55942800300 57195441001 Ascorbic acid Citric acid Cobalt compounds Copper oxides Electrocatalysts Electrodes Energy policy Metabolism Nanostructures Nickel oxide Oxygen Plants (botany) Sodium hydroxide Aloe vera Diethylamines Electrocatalytic Elemental compositions Energy crisis Global energy Green synthesis Nickel foam Phytochemical Water splitting Urea Electrocatalytic water splitting is a promising solution to resolve the global energy crisis. Tuning the morphology and elemental composition is a crucial aspect in designing highly-efficient nanomaterials based electrocatalyst for water splitting. Herein, green synthesis using phytochemicals from aloe vera leaves extract was employed to hydrothermally synthesize copper oxide/cobalt oxide nanostructures on nickel foam. The reaction medium was performed in presence of mineralizers of different pH; hydrochloric acid (HCl), citric acid (CA), urea, diethyl amine (DEA) and sodium hydroxide (NaOH) to produce five different compositions of copper oxide/cobalt oxide on nickel foam. Based on FESEM and EDS analysis, it was verified that the plant mediated hydrothermal process yielded interesting morphologies and the elemental composition of the synthesized metal oxide nanostructures distinctly varied with effect to the different mineralizers used. Use of acidic mineralizers such as hydrochloric acid and citric acid favoured formation of copper oxide whereas basic mineralizers such as urea, diethyl amine and sodium hydroxide favoured formation of cobalt oxide. The green synthesis of metal oxide electrode in presence of urea exhibits the best OER electrocatalytic performance with an overpotential of 390 mV, and 453 mV for a current density of 50 mA cm?2 and 100 mA cm?2 respectively. The sample also exhibited sustained stability over 70 h, hence proving that the proposed electrode can serve as an efficient catalyst for electrocatalytic OER. ? 2023 Hydrogen Energy Publications LLC Final 2025-03-03T07:44:48Z 2025-03-03T07:44:48Z 2024 Article 10.1016/j.ijhydene.2023.07.042 2-s2.0-85167790945 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85167790945&doi=10.1016%2fj.ijhydene.2023.07.042&partnerID=40&md5=6c612825e184be198643bb21bceca456 https://irepository.uniten.edu.my/handle/123456789/36805 51 700 712 Elsevier Ltd Scopus
institution	Universiti Tenaga Nasional
building	UNITEN Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Tenaga Nasional
content_source	UNITEN Institutional Repository
url_provider	http://dspace.uniten.edu.my/
topic	Ascorbic acid Citric acid Cobalt compounds Copper oxides Electrocatalysts Electrodes Energy policy Metabolism Nanostructures Nickel oxide Oxygen Plants (botany) Sodium hydroxide Aloe vera Diethylamines Electrocatalytic Elemental compositions Energy crisis Global energy Green synthesis Nickel foam Phytochemical Water splitting Urea
spellingShingle	Ascorbic acid Citric acid Cobalt compounds Copper oxides Electrocatalysts Electrodes Energy policy Metabolism Nanostructures Nickel oxide Oxygen Plants (botany) Sodium hydroxide Aloe vera Diethylamines Electrocatalytic Elemental compositions Energy crisis Global energy Green synthesis Nickel foam Phytochemical Water splitting Urea Sarkar D.K. Selvanathan V. Mottakin M. Islam M.A. Almohamadi H. Alharthi N.H. Akhtaruzzaman M. Phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction
description	Electrocatalytic water splitting is a promising solution to resolve the global energy crisis. Tuning the morphology and elemental composition is a crucial aspect in designing highly-efficient nanomaterials based electrocatalyst for water splitting. Herein, green synthesis using phytochemicals from aloe vera leaves extract was employed to hydrothermally synthesize copper oxide/cobalt oxide nanostructures on nickel foam. The reaction medium was performed in presence of mineralizers of different pH; hydrochloric acid (HCl), citric acid (CA), urea, diethyl amine (DEA) and sodium hydroxide (NaOH) to produce five different compositions of copper oxide/cobalt oxide on nickel foam. Based on FESEM and EDS analysis, it was verified that the plant mediated hydrothermal process yielded interesting morphologies and the elemental composition of the synthesized metal oxide nanostructures distinctly varied with effect to the different mineralizers used. Use of acidic mineralizers such as hydrochloric acid and citric acid favoured formation of copper oxide whereas basic mineralizers such as urea, diethyl amine and sodium hydroxide favoured formation of cobalt oxide. The green synthesis of metal oxide electrode in presence of urea exhibits the best OER electrocatalytic performance with an overpotential of 390 mV, and 453 mV for a current density of 50 mA cm?2 and 100 mA cm?2 respectively. The sample also exhibited sustained stability over 70 h, hence proving that the proposed electrode can serve as an efficient catalyst for electrocatalytic OER. ? 2023 Hydrogen Energy Publications LLC
author2	57220704093
author_facet	57220704093 Sarkar D.K. Selvanathan V. Mottakin M. Islam M.A. Almohamadi H. Alharthi N.H. Akhtaruzzaman M.
format	Article
author	Sarkar D.K. Selvanathan V. Mottakin M. Islam M.A. Almohamadi H. Alharthi N.H. Akhtaruzzaman M.
author_sort	Sarkar D.K.
title	Phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction
title_short	Phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction
title_full	Phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction
title_fullStr	Phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction
title_full_unstemmed	Phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction
title_sort	phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction
publisher	Elsevier Ltd
publishDate	2025
_version_	1825816120492294144
score	13.244413

Phytochemicals assisted green synthesis of copper oxide/cobalt oxide as efficient electrocatalyst for oxygen evolution reaction

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