OJC – Vol 3 – issue 1 (2020) – PISRT https://old.pisrt.org Mon, 25 Jan 2021 17:26:51 +0000 en-US hourly 1 https://wordpress.org/?v=6.7 Facile synthesis of Nickel-iron based electrocatalyst anodes for efficient oxygen evolution reaction https://old.pisrt.org/psr-press/journals/ojc-vol-3-issue-1-2020/facile-synthesis-of-nickel-iron-based-electrocatalyst-anodes-for-efficient-oxygen-evolution-reaction/ Sat, 07 Nov 2020 07:08:28 +0000 https://old.pisrt.org/?p=4640
OJC-Vol. 3 (2020), Issue 1, pp. 6 - 12 Open Access Full-Text PDF
Aisha Batool, Farah Kanwal, Shahzad Ahmad, Sumreen Asim, Murtaza Saleem
Abstract: In this research, we reported facile synthesis of efficient \(Ni_3Fe\) electrocatalyst nanostructures deposited on conducting carbon fibers surface by a simple chemical bath deposition method at moderate temperature. The composition, phase and electrocatalytic property of as-prepared binder-free electrocatalyst was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and electrochemical measurements. The as-synthesized \(Ni_3Fe@t-CF\) presented excellent performance and durability as water oxidation electrocatalyst in alkaline electrolyte owing to non-segregated deposition of \(Ni_3Fe\) nanostructures on conducting surface of carbon, high electrochemical surface area, and the fast absorption and desorption of water molecules during oxygen evolution reaction due to the \(3D\) architecture of conducting interlaced carbon fibers template.
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Open Journal of Chemistry

Vol. 3 (2020), Issue 1, pp. 6 – 12
ISSN: 2618-0758 (Online) 2618-074X (Print)
DOI: 10.30538/psrp-ojc2020.0017

Facile synthesis of Nickel-iron based electrocatalyst anodes for efficient oxygen evolution reaction

Aisha Batool\(^1\), Farah Kanwal, Shahzad Ahmad, Sumreen Asim, Murtaza Saleem
School of Physical Sciences, University of the Punjab, Lahore 54590, Pakistan.; (A.B)
Institute of Chemistry, University of the Punjab, Lahore-54590, Pakistan.; (F.K)
School of Economics and Management, Beijing Forestry University, Beijing-100083, China.; (S.Ahmad))
Khwaja Fareed University of Engineering and Information Technology, Department of Chemistry, 64200-RYK, Pakistan.; (S.Asim)
Department of Physics, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences (LUMS), 54792-Lahore, Pakistan.; (M.S)
\(^{1}\)Corresponding Author;  dr.batool.aisha@gmail.com

Copyright © 2020 Aisha Batool, Farah Kanwal, Shahzad Ahmad, Sumreen Asim, Murtaza Saleem. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Received: May 18, 2020 – Accepted: August 27, 2020 – Published: November 7, 2020

Abstract

In this research, we reported facile synthesis of efficient \(Ni_3Fe\) electrocatalyst nanostructures deposited on conducting carbon fibers surface by a simple chemical bath deposition method at moderate temperature. The composition, phase and electrocatalytic property of as-prepared binder-free electrocatalyst was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and electrochemical measurements. The as-synthesized \(Ni_3Fe@t-CF\) presented excellent performance and durability as water oxidation electrocatalyst in alkaline electrolyte owing to non-segregated deposition of \(Ni_3Fe\) nanostructures on conducting surface of carbon, high electrochemical surface area, and the fast absorption and desorption of water molecules during oxygen evolution reaction due to the \(3D\) architecture of conducting interlaced carbon fibers template.

Keywords:

Chemical deposition, \(Ni_3Fe\) nanostructures, carbon cloth fibers, electrochemical surface area, conductivity, oxygen evolution.
]]> Chemical composition and Antioxidant activity of essential oil from flowers of Couroupita guianensis Aubl. from El Salvador https://old.pisrt.org/psr-press/journals/ojc-vol-3-issue-1-2020/chemical-composition-and-antioxidant-activity-of-essential-oil-from-flowers-of-couroupita-guianensis-aubl-from-el-salvador/ Sat, 07 Nov 2020 06:51:08 +0000 https://old.pisrt.org/?p=4638
OJC-Vol. 3 (2020), Issue 1, pp. 1 - 6 Open Access Full-Text PDF
Francesco Saverio Robustelli della Cuna, Ilaria Bruni, Morena L. Martínez, Marvin J. Núnez
Abstract: Couroupita guianensis Aubl. (Lecythidaceae) "Cannonball tree" is a tropical plant with ethnobotanical uses. The present study is focused on analyzing the essential oil composition of Couroupita guianensis (C. guianensi) fresh flowers collected in El Salvador. Steam distillation, coupled with GC/FID and GC/MS analysis were employed to characterize the chemical composition and in vitro antioxidant activity study were carried out using DPPH assay. Eugenol was identified to be the most abundant constituent and quantified as \(46.20\)% of the total volatiles. Other constituents were found to be \(2\)-phenylethanol \((34.82\)%), \((E)-(E)\)-farnesol \((5.53\)%), nerol \((3.95\)%), geraniol \((3.20\)%), benzyl alcohol \((1.77\)%). \(DPPH\) assay showed a dose-dependent antioxidant activity. The study demonstrated that C. guianensis essential oil from El Salvador is a rich source of eugenol, which may be responsible for its antioxidant properties. Based on these results, further studies on the antibacterial and antifungal activity of C. guianensis essential oil are of fundamental importance.
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Open Journal of Chemistry

Vol. 3 (2020), Issue 1, pp. 1 – 6
ISSN: 2618-0758 (Online) 2618-074X (Print)
DOI: 10.30538/psrp-ojc2020.0016

Chemical composition and Antioxidant activity of essential oil from flowers of Couroupita guianensis Aubl. from El Salvador

Francesco Saverio Robustelli della Cuna\(^1\), Ilaria Bruni, Morena L. Martínez, Marvin J. Núnez
Department of Drug Sciences, University of Pavia, via Taramelli 12, 27100, Pavia, Italy.; (F.S.R.C)
ZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2,I-20126, Milano, Italy.; (F.S.R.C & I.B)
Laboratorio de Investigación en Productos Naturales, Facultad de Química y Farmacia, Universidad de El Salvador, Final Av. de Mártires y Héroes del 30 de Julio, San Salvador 1101, El Salvador.; (M.L.M & M.J.N)
\(^{1}\)Corresponding Author;  fsaveriorobustelli@unipv.it

Copyright © 2020 Francesco Saverio Robustelli della Cuna, Ilaria Bruni, Morena L. Martínez, Marvin J. Núnez. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Received: September 9, 2020 – Accepted: October 1, 2020 – Published: November 7, 2020

Abstract

Couroupita guianensis Aubl. (Lecythidaceae) “Cannonball tree” is a tropical plant with ethnobotanical uses. The present study is focused on analyzing the essential oil composition of Couroupita guianensis (C. guianensi) fresh flowers collected in El Salvador. Steam distillation, coupled with GC/FID and GC/MS analysis were employed to characterize the chemical composition and in vitro antioxidant activity study were carried out using DPPH assay. Eugenol was identified to be the most abundant constituent and quantified as \(46.20\)% of the total volatiles. Other constituents were found to be \(2\)-phenylethanol \((34.82\)%), \((E)-(E)\)-farnesol \((5.53\)%), nerol \((3.95\)%), geraniol \((3.20\)%), benzyl alcohol \((1.77\)%). \(DPPH\) assay showed a dose-dependent antioxidant activity. The study demonstrated that C. guianensis essential oil from El Salvador is a rich source of eugenol, which may be responsible for its antioxidant properties. Based on these results, further studies on the antibacterial and antifungal activity of C. guianensis essential oil are of fundamental importance.

Keywords:

Couroupita guianensis, essential oil, eugenol, \(2\)-phenylethanol, \((E)-(E)\)-farnesol, \(DPPH\).
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