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Manouchehri M, Seidi S, Tavasolinoor A, Razeghi Y. A new approach of magnetic field application in miniaturized pipette-tip extraction for trace analysis of four synthetic hormones in breast milk samples. Food Chem 2023; 409:135222. [PMID: 36586256 DOI: 10.1016/j.foodchem.2022.135222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
Herein, a novel homemade electrical device was designed, including two pieces of external neodymium magnets, providing a reciprocating magnetic field to introduce a magnetic-assisted dispersive pipette-tip micro solid-phase extraction. To evaluate the performance efficiency of the proposed method, a novel magnetic calcined GO/SiO2@Co-Fe nanocube sorbent was synthesized, filled into the pipette-tip, exposed to the reciprocating magnetic field, and applied for the preconcentration of some hormone therapy drugs in human biological matrices. The effective adsorption and desorption parameters were optimized using a rotatable central composite design and one-variable-at-a-time approaches. Under the optimized conditions, the target analytes' detection limits were found to be below 0.02 ng mL-1. Moreover, the calibration curves were linear in the range of 0.03-500.00 ng mL-1 (R2 > 0.9966), with RSDs% less than 7.8 %. Eventually, the established method was applied to extract the analytes from breast milk samples, followed by LC-ESI-MS/MS analysis.
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Affiliation(s)
- Mahshid Manouchehri
- Department of Analytical Chemistry, Faculty of Chemistry, K.N. Toosi University of Technology, P.O. Box 16315-1618, Postal Code 15418-49611, Tehran, Iran; Nanomaterial, Separation and Trace Analysis Research Lab, K.N. Toosi University of Technology, P.O. Box 16315-1618, Postal Code 15418-49611, Tehran, Iran
| | - Shahram Seidi
- Department of Analytical Chemistry, Faculty of Chemistry, K.N. Toosi University of Technology, P.O. Box 16315-1618, Postal Code 15418-49611, Tehran, Iran; Nanomaterial, Separation and Trace Analysis Research Lab, K.N. Toosi University of Technology, P.O. Box 16315-1618, Postal Code 15418-49611, Tehran, Iran.
| | - Ali Tavasolinoor
- Department of Computer Engineering, Shahre-Rey Branch, Islamic Azad University, Tehran, Iran
| | - Yasaman Razeghi
- Department of Analytical Chemistry, Faculty of Chemistry, K.N. Toosi University of Technology, P.O. Box 16315-1618, Postal Code 15418-49611, Tehran, Iran; Nanomaterial, Separation and Trace Analysis Research Lab, K.N. Toosi University of Technology, P.O. Box 16315-1618, Postal Code 15418-49611, Tehran, Iran
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Shahraki HS, Bushra R, Shakeel N, Ahmad A, Quratulen, Ahmad M, Ritzoulis C. Papaya Peel Waste Carbon Dots/Reduced Graphene Oxide Nanocomposite: from Photocatalytic Decomposition of Methylene Blue to Antimicrobial Activity. JOURNAL OF BIORESOURCES AND BIOPRODUCTS 2023. [DOI: 10.1016/j.jobab.2023.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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3
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Shahid M, Katugampalage TR, Khalid M, Ahmed W, Kaewsaneha C, Sreearunothai P, Opaprakasit P. Microwave assisted synthesis of Mn3O4 nanograins intercalated into reduced graphene oxide layers as cathode material for alternative clean power generation energy device. Sci Rep 2022; 12:19043. [PMID: 36352184 PMCID: PMC9646735 DOI: 10.1038/s41598-022-23622-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 11/02/2022] [Indexed: 11/10/2022] Open
Abstract
Mn3O4 nanograins incorporated into reduced graphene oxide as a nanocomposite electrocatalyst have been synthesized via one-step, facile, and single-pot microwave-assisted hydrothermal technique. The nanocomposites were employed as cathode material of fuel cells for oxygen reduction reaction (ORR). The synthesized product was thoroughly studied by using important characterization, such as XRD for the structure analysis and FESEM and TEM analyses to assess the morphological structures of the material. Raman spectra were employed to study the GO, rGO bands and formation of Mn3O4@rGO nanocomposite. FTIR and UV–Vis spectroscopic analysis were used to verify the effective synthesis of the desired electrocatalyst. The Mn3O4@rGO-10% nanocomposite with 10 wt% of graphene oxide was used to alter the shiny surface of the working electrode and applied for ORR in O2 purged 0.5 M KOH electrolyte solution. The Mn3O4@rGO-10% nanocomposite electrocatalyst exhibited outstanding performance with an improved current of − 0.738 mA/cm2 and shifted overpotential values of − 0.345 V when compared to other controlled electrodes, including the conventionally used Pt/C catalyst generally used for ORR activity. The tolerance of Mn3O4@rGO-10% nanocomposite was tested by injecting a higher concentration of methanol, i.e., 0.5 M, and found unsusceptible by methanol crossover. The stability test of the synthesized electrocatalyst after 3000 s was also considered, and it demonstrated excellent current retention of 98% compared to commercially available Pt/C electrocatalyst. The synthesized nanocomposite material could be regarded as an effective and Pt-free electrocatalyst for practical ORR that meets the requirement of low cost, facile fabrication, and adequate stability.
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Ghanem MA, Amer MS, Arunachalam P, Al-Mayouf AM, Weller MT. Role of rhodium doping into lanthanum cobalt oxide (LaCoO3) perovskite and the induced bifunctional activity of oxygen evolution and reduction reactions in alkaline medium. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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Nair AN, Sanad MF, Jayan R, Gutierrez G, Ge Y, Islam MM, Hernandez-Viezcas JA, Zade V, Tripathi S, Shutthanandan V, Ramana CV, T Sreenivasan S. Lewis Acid Site Assisted Bifunctional Activity of Tin Doped Gallium Oxide and Its Application in Rechargeable Zn-Air Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2202648. [PMID: 35900063 DOI: 10.1002/smll.202202648] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Indexed: 06/15/2023]
Abstract
The enhanced safety, superior energy, and power density of rechargeable metal-air batteries make them ideal energy storage systems for application in energy grids and electric vehicles. However, the absence of a cost-effective and stable bifunctional catalyst that can replace expensive platinum (Pt)-based catalyst to promote oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at the air cathode hinders their broader adaptation. Here, it is demonstrated that Tin (Sn) doped β-gallium oxide (β-Ga2 O3 ) in the bulk form can efficiently catalyze ORR and OER and, hence, be applied as the cathode in Zn-air batteries. The Sn-doped β-Ga2 O3 sample with 15% Sn (Snx =0.15 -Ga2 O3 ) displayed exceptional catalytic activity for a bulk, non-noble metal-based catalyst. When used as a cathode, the excellent electrocatalytic bifunctional activity of Snx =0.15 -Ga2 O3 leads to a prototype Zn-air battery with a high-power density of 138 mW cm-2 and improved cycling stability compared to devices with benchmark Pt-based cathode. The combined experimental and theoretical exploration revealed that the Lewis acid sites in β-Ga2 O3 aid in regulating the electron density distribution on the Sn-doped sites, optimize the adsorption energies of reaction intermediates, and facilitate the formation of critical reaction intermediate (O*), leading to enhanced electrocatalytic activity.
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Affiliation(s)
- Aruna Narayanan Nair
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Mohamed F Sanad
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, TX, 79968, USA
- Department of Environmental Sciences and Engineering, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Rahul Jayan
- Department of Mechanical Engineering, Wayne State University, Detroit, MI, 48202, USA
| | - Guillermo Gutierrez
- Center for Advanced Materials Research (CMR), The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Yulu Ge
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Md Mahbubul Islam
- Department of Mechanical Engineering, Wayne State University, Detroit, MI, 48202, USA
| | - Jose A Hernandez-Viezcas
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Vishal Zade
- Center for Advanced Materials Research (CMR), The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Shalini Tripathi
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Vaithiyalingam Shutthanandan
- Environmental Molecular Sciences Laboratory (EMSL), Pacific Northwest National Laboratory (PNNL), Richland, WA, 99352, USA
| | - Chintalapalle V Ramana
- Center for Advanced Materials Research (CMR), The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Sreeprasad T Sreenivasan
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, TX, 79968, USA
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Spray-Pyrolytic Tunable Structures of Mn Oxides-Based Composites for Electrocatalytic Activity Improvement in Oxygen Reduction. METALS 2021. [DOI: 10.3390/met12010022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Hybrid nanomaterials based on manganese, cobalt, and lanthanum oxides of different morphology and phase compositions were prepared using a facile single-step ultrasonic spray pyrolysis (USP) process and tested as electrocatalysts for oxygen reduction reaction (ORR). The structural and morphological characterizations were completed by XRD and SEM-EDS. Electrochemical performance was characterized by cyclic voltammetry and linear sweep voltammetry in a rotating disk electrode assembly. All synthesized materials were found electrocatalytically active for ORR in alkaline media. Two different manganese oxide states were incorporated into a Co3O4 matrix, δ-MnO2 at 500 and 600 °C and manganese (II,III) oxide-Mn3O4 at 800 °C. The difference in crystalline structure revealed flower-like nanosheets for birnessite-MnO2 and well-defined spherical nanoparticles for material based on Mn3O4. Electrochemical responses indicate that the ORR mechanism follows a preceding step of MnO2 reduction to MnOOH. The calculated number of electrons exchanged for the hybrid materials demonstrate a four-electron oxygen reduction pathway and high electrocatalytic activity towards ORR. The comparison of molar catalytic activities points out the importance of the composition and that the synergy of Co and Mn is superior to Co3O4/La2O3 and pristine Mn oxide. The results reveal that synthesized hybrid materials are promising electrocatalysts for ORR.
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Belles L, Moularas C, Smykała S, Deligiannakis Y. Flame Spray Pyrolysis Co 3O 4/CoO as Highly-Efficient Nanocatalyst for Oxygen Reduction Reaction. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:925. [PMID: 33916435 PMCID: PMC8066371 DOI: 10.3390/nano11040925] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/23/2021] [Accepted: 04/01/2021] [Indexed: 12/30/2022]
Abstract
The oxygen reduction reaction (ORR) is the rate-limiting reaction in the cathode side of fuel cells. In the quest for alternatives to Pt-electrodes as cathodes in ORR, appropriate transition metal oxide-based electrocatalysts are needed. In the present work, we have synthesized Co3O4 and CoO/Co3O4 nanostructures using flame spray pyrolysis (FSP), as electrocatalysts for ORR in acidic and alkaline media. A detailed study of the effect of (Co-oxide)/Pt ratio on ORR efficiency shows that the present FSP-made Co-oxides are able to perform ORR at very low-Pt loading, 0.4% of total metal content. In acid medium, an electrode with (5.2% Pt + 4.8% Co3O4), achieved the highest ORR performance (Jmax = 8.31 mA/cm2, E1/2 = 0.66 V). In alkaline medium, superior performance and stability have been achieved by an electrode with (0.4%Pt + 9.6% (CoO/Co3O4)) with ORR activity (Jmax = 3.5 mA/cm2, E1/2 = 0.08 V). Using XRD, XPS, Raman and TEM data, we discuss the structural and electronic aspects of the FSP-made Co-oxide catalysts in relation to the ORR performance. Cyclic voltammetry data indicate that the ORR process involves active sites associated with Co3+ cations at the cobalt oxide surface. Technology-wise, the present work demonstrates that the developed FSP-protocols, constitutes a novel scalable process for production of co-oxides appropriate for oxygen reduction reaction electrodes.
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Affiliation(s)
- Loukas Belles
- Laboratory of Physics Chemistry of Materials & Environment, Department of Physics, University of Ioannina, 45550 Ioannina, Greece; (L.B.); (C.M.)
| | - Constantinos Moularas
- Laboratory of Physics Chemistry of Materials & Environment, Department of Physics, University of Ioannina, 45550 Ioannina, Greece; (L.B.); (C.M.)
| | - Szymon Smykała
- Institute of Engineering Materials and Biomaterials, Silesian University of Technology, 18a Konarskiego St, 44-100 Gliwice, Poland;
| | - Yiannis Deligiannakis
- Laboratory of Physics Chemistry of Materials & Environment, Department of Physics, University of Ioannina, 45550 Ioannina, Greece; (L.B.); (C.M.)
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8
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Hoseini Chopani SM, Asadi S, Heravi MM. Application of Bimetallic and Trimetallic Nanoparticles Supported on Graphene as novel Heterogeneous Catalysts in the Reduction of Nitroarenes, Homo-coupling, Suzuki-Miyaura and Sonogashira Reactions. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200914111559] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In the last decade, the use of heterogeneous catalysts based on Metal Nanoparticles
(MNPs) has attracted increasing attention due to their prominence as nanocatalysts in
several key chemical transformations. Notably, it is well identified that supporting Metal
Nanoparticles (MNPs) with suitable solid surfaces can protect the MNPs from leaching,
deactivation, and also increasing its ease of separation and possible reusability. Graphene
oxide (GO) as a conductive surface could have non-covalent bonding interactions like hydrogen
bonding, electrostatic and π –π* stacking interactions with substrate leading to
activation of the substrate. Remarkably, it is recognized that bimetallic nanoparticles supported
on graphene oxide often show novel properties that are not present on either of the
parent metal or surfaces. In this review, we tried to reveal the potential advantages of
bimetallic and trimetallic nanoparticles supported on graphene oxide in organic transformations, including the
reduction of nitroarenes, Suzuki-Miyaura and Sonogashira coupling reactions.
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Affiliation(s)
| | - Shima Asadi
- Faculty of Chemistry and Physics, Department of Chemistry, Alzahra University, Vanak, Tehran, Iran
| | - Majid M. Heravi
- Faculty of Chemistry and Physics, Department of Chemistry, Alzahra University, Vanak, Tehran, Iran
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9
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Zhuang S, Shao C, Ye J, Li B, Wang X. Enhancing oxygen reduction reaction in air-cathode microbial fuel cells treating wastewater with cobalt and nitrogen co-doped ordered mesoporous carbon as cathode catalysts. ENVIRONMENTAL RESEARCH 2020; 191:110195. [PMID: 32919967 DOI: 10.1016/j.envres.2020.110195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 08/26/2020] [Accepted: 08/29/2020] [Indexed: 06/11/2023]
Abstract
The sluggish oxygen reduction reaction (ORR) on the cathode severely limits the energy conversion efficiency of microbial fuel cells (MFCs). In this study, cobalt and nitrogen co-doped ordered mesoporous carbon (Cox-N-OMC) was prepared by heat-treating a mixture of cobalt nitrate, melamine and ordered mesoporous carbon (OMC). The addition of cobalt nitrate remarkably improved the ORR reactivity, compared to the nitrogen-doped OMC catalyst. By optimizing the dosage of cobalt nitrate (x = 0.6, 0.8 and 1.0 g), the Co0.8-N-OMC catalyst displayed excellent ORR catalytic performances in neutral media with the onset potential of 0.79 V (vs. RHE), half-wave potential of 0.59 V and limiting current density of 5.43 mA/cm2, which was comparable to the commercial Pt/C catalyst (0.86 V, 0.60 V and 4.76 mA/cm2). The high activity of Co0.8-N-OMC catalyst was attributed to the high active surface area, higher total nitrogen amount, and higher relative distribution of graphitic nitrogen and pyrrolic nitrogen species. Furthermore, single chamber microbial fuel cell (SCMFC) with Co0.8-N-OMC cathode exhibited the highest power density of 389 ± 24 mW/m2, chemical oxygen demand (COD) removal of 81.1 ± 2.2% and coulombic efficiency (CE) of 17.2 ± 2.5%. On the other hand, in the Co1.0-N-OMC catalyst, increasing the cobalt dosage from 0.8 to 1.0 g resulted in more oxidized-N species, and the reduced power generation in SCMFC (360 ± 8 mW/m2). The power generated by these catalysts and results of electrochemical evaluation were strongly correlated with the total nitrogen contents on the catalyst surface. This study demonstrated the feasibility of optimizing the dosage of metal to enhance wastewater treatment capacity.
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Affiliation(s)
- Shiguang Zhuang
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Chunfeng Shao
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Jianshan Ye
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Baitao Li
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.
| | - Xiujun Wang
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.
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Sookhakian M, Tong GB, Alias Y. In‐Situ Electrodeposition of Rhodium nanoparticles Anchored on Reduced Graphene Oxide nanosheets as an Efficient Oxygen Reduction Electrocatalyst. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5370] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- M. Sookhakian
- Department of Chemistry, Faculty of ScienceUniversity of Malaya Kuala Lumpur 50603 Malaysia
- University Malaya Centre for Ionic Liquids, Department of Chemistry, Faculty of ScienceUniversity of Malaya Kuala Lumpur 50603 Malaysia
- Low Dimensional Materials Research Centre, Department of Physics, Faculty of ScienceUniversity of Malaya 50603 , Kuala Lumpur Malaysia
| | - Goh Boon Tong
- Low Dimensional Materials Research Centre, Department of Physics, Faculty of ScienceUniversity of Malaya 50603 , Kuala Lumpur Malaysia
| | - Y. Alias
- Department of Chemistry, Faculty of ScienceUniversity of Malaya Kuala Lumpur 50603 Malaysia
- University Malaya Centre for Ionic Liquids, Department of Chemistry, Faculty of ScienceUniversity of Malaya Kuala Lumpur 50603 Malaysia
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11
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Munde AV, Mulik BB, Dighole RP, Sathe BR. Cobalt oxide nanoparticle-decorated reduced graphene oxide (Co3O4–rGO): active and sustainable nanoelectrodes for water oxidation reaction. NEW J CHEM 2020. [DOI: 10.1039/d0nj02598d] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Herein, cobalt oxide (Co3O4)-decorated reduced graphene oxide (rGO)-based nanoelectrodes were fabricated by the chemical reduction method for electrocatalytic water oxidation reactions.
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Affiliation(s)
- Ajay V. Munde
- Department of Chemistry
- Dr Babasaheb Ambedkar Marathwada University Aurangabad
- India
| | - Balaji B. Mulik
- Department of Chemistry
- Dr Babasaheb Ambedkar Marathwada University Aurangabad
- India
| | - Raviraj P. Dighole
- Department of Chemistry
- Dr Babasaheb Ambedkar Marathwada University Aurangabad
- India
| | - Bhaskar R. Sathe
- Department of Chemistry
- Dr Babasaheb Ambedkar Marathwada University Aurangabad
- India
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Li Y, Li Q, Wang H, Zhang L, Wilkinson DP, Zhang J. Recent Progresses in Oxygen Reduction Reaction Electrocatalysts for Electrochemical Energy Applications. ELECTROCHEM ENERGY R 2019. [DOI: 10.1007/s41918-019-00052-4] [Citation(s) in RCA: 121] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Abstract
Electrochemical energy storage systems such as fuel cells and metal–air batteries can be used as clean power sources for electric vehicles. In these systems, one necessary reaction at the cathode is the catalysis of oxygen reduction reaction (ORR), which is the rate-determining factor affecting overall system performance. Therefore, to increase the rate of ORR for enhanced system performances, efficient electrocatalysts are essential. And although ORR electrocatalysts have been intensively explored and developed, significant breakthroughs have yet been achieved in terms of catalytic activity, stability, cost and associated electrochemical system performance. Based on this, this review will comprehensively present the recent progresses of ORR electrocatalysts, including precious metal catalysts, non-precious metal catalysts, single-atom catalysts and metal-free catalysts. In addition, major technical challenges are analyzed and possible future research directions to overcome these challenges are proposed to facilitate further research and development toward practical application.
Graphic Abstract
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13
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Sagadevan S, Marlinda AR, Johan MR, Umar A, Fouad H, Alothman OY, Khaled U, Akhtar MS, Shahid MM. Reduced graphene/nanostructured cobalt oxide nanocomposite for enhanced electrochemical performance of supercapacitor applications. J Colloid Interface Sci 2019; 558:68-77. [PMID: 31585223 DOI: 10.1016/j.jcis.2019.09.081] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 09/19/2019] [Accepted: 09/21/2019] [Indexed: 01/25/2023]
Abstract
We demonstrate the preparation of nanostructures cobalt oxide/reduced graphene oxide (Co3O4/rGO) nanocomposites by a simple one-step cost-effective hydrothermal technique for possible electrode materials in supercapacitor application. The X-ray diffraction patterns were employed to confirm the nanocomposite crystal system of Co3O4/rGO by demonstrating the existence of normal cubic spinel structure of Co3O4 in the matrix of Co3O4/rGO nanocomposite. FTIR and FT-Raman studies manifested the structural behaviour and quality of prepared Co3O4/rGO nanocomposite. The optical properties of the nanocomposite Co3O4/rGO have been investigated by UV absorption spectra. The SEM/TEM images showed that the Co3O4 nanoparticles in the Co3O4/rGO nanocomposites were covered over the surface of the rGO sheets. The electrical properties were analyzed in terms of real and imaginary permittivity, dielectric loss and AC conductivity. The electrocatalytic activities of synthesized Co3O4/rGO nanocomposites were determined by cyclic voltammetry and charge-discharge cycle to evaluate the supercapacitive performance. The specific capacitance of 754 Fg-1 was recorded for Co3O4/rGO nanocomposite based electrode in three electrode cell system. The electrode material exhibited an acceptable capability and excellent long-term cyclic stability by maintaining 96% after 1000 continuous cycles. These results showed that the prepared sample could be an ideal candidate for high-energy application as electrode materials. The synthesized Co3O4/rGO nanocomposite is a versatile material and can be used in various application such as fuel cells, electrochemical sensors, gas sensors, solar cells, and photocatalysis.
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Affiliation(s)
- Suresh Sagadevan
- Nanotechnology & Catalysis Research Centre, University of Malaya, Malaysia.
| | - A R Marlinda
- Nanotechnology & Catalysis Research Centre, University of Malaya, Malaysia
| | - Mohd Rafie Johan
- Nanotechnology & Catalysis Research Centre, University of Malaya, Malaysia
| | - Ahmad Umar
- Department of Chemistry, Faculty of Science and Arts and Promising Centre for Sensors and Electronic Devices, Najran University, Najran 11001, Saudi Arabia.
| | - H Fouad
- Applied Medical Science Dept., Community College, King Saud University, Riyadh, Saudi Arabia; Department of Biomedical Engineering, Faculty of Engineering, Helwan University, Egypt
| | - Othman Y Alothman
- Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia
| | - Usama Khaled
- Department of Electrical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia; Department of Electrical Engineering, Faculty of Energy Engineering, Aswan University, Aswan 81528, Egypt
| | - M S Akhtar
- New and Renewable Energy Materials Development Center (NewREC), Chonbuk National University, Jeonbuk 56332, Republic of Korea.
| | - M M Shahid
- Higher Institution Centre of Excellence (HICoE), UM Power Energy Dedicated Advanced Centre (UMPEDAC), 59990 Kuala Lumpur, Malaysia
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Shahid MM, Rameshkumar P, Numan A, Shahabuddin S, Alizadeh M, Khiew PS, Chiu WS. A cobalt oxide nanocubes interleaved reduced graphene oxide nanocomposite modified glassy carbon electrode for amperometric detection of serotonin. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 100:388-395. [DOI: 10.1016/j.msec.2019.02.107] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 02/22/2019] [Accepted: 02/27/2019] [Indexed: 12/27/2022]
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15
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Fabrication and characterization of graphene oxide–titanium dioxide nanocomposite for degradation of some toxic insecticides. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.09.045] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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16
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El-Shafai N, El-Khouly ME, El-Kemary M, Ramadan M, Eldesoukey I, Masoud M. Graphene oxide decorated with zinc oxide nanoflower, silver and titanium dioxide nanoparticles: fabrication, characterization, DNA interaction, and antibacterial activity. RSC Adv 2019; 9:3704-3714. [PMID: 35518070 PMCID: PMC9060286 DOI: 10.1039/c8ra09788g] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 01/13/2019] [Indexed: 12/28/2022] Open
Abstract
The fabrication, characterization, and antibacterial activity of novel nanocomposites based on graphene oxide (GO) nanosheets decorated with silver, titanium dioxide nanoparticles, and zinc oxide nanoflowers were examined. The fabricated nanocomposites were characterized by various techniques including X-ray diffraction, ultraviolet-visible light absorption and fluorescence spectroscopy, Brunauer–Emmett–Teller theory analysis, Fourier transform infrared, and scanning electron microscopy. The antibacterial activity of the GO–metal oxide nanocomposites against two Gram-positive and two Gram-negative bacteria was examined by using the standard counting plate methodology. The results showed that the fabricated nanocomposites on the surface of GO could inhibit the growth of microbial adhered cells, and consequently prevent the process of biofilm formation in food packaging and medical devices. To confirm the antibacterial activity of the examined GO-nanocomposites, we examined their interactions with bovine serum albumin (BSA) and circulating tumor DNA (ctDNA) by steady-state fluorescence spectroscopy. Upon addition of different amounts of fabricated GO-nanocomposites, the fluorescence intensities of the singlet states of BSA and ctDNA were considerably quenched. The higher quenching was observed in the case of GO–Ag–TiO2@ZnO nanocomposite compared with other control composites. The fabrication, characterization, and antibacterial activity of novel nanocomposites based on graphene oxide (GO) nanosheets decorated with silver, titanium dioxide nanoparticles, and zinc oxide nanoflowers were examined.![]()
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Affiliation(s)
- Nagi El-Shafai
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Egypt
- Institute of Nanoscience and Nanotechnology
| | - Mohamed E. El-Khouly
- Department of Chemistry
- Faculty of Science
- Kafrelsheikh University
- Egypt
- Institute of Basic and Applied Sciences
| | - Maged El-Kemary
- Institute of Nanoscience and Nanotechnology
- Kafrelsheikh University
- Egypt
- Department of Chemistry
- Faculty of Science
| | - Mohamed Ramadan
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Egypt
| | - Ibrahim Eldesoukey
- Department of Bacteriology, Mycology and Immunology
- Faculty of Veterinary Medicine
- Kafrelsheikh University
- Egypt
| | - Mamdouh Masoud
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Egypt
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17
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Li M, Bai L, Wu S, Wen X, Guan J. Co/CoO x Nanoparticles Embedded on Carbon for Efficient Catalysis of Oxygen Evolution and Oxygen Reduction Reactions. CHEMSUSCHEM 2018; 11:1722-1727. [PMID: 29645358 DOI: 10.1002/cssc.201800489] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 03/29/2018] [Indexed: 06/08/2023]
Abstract
The oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are important electrochemical reactions to realize clean energy technologies. Herein, we prepared a hybrid electrocatalyst consisting of Co/CoOx nanoparticles embedded in amorphous carbon through the simple pyrolysis of cobalt-based zeolitic terephthalate frameworks. The pyrolysis temperature significantly influenced the structure morphology and catalytic behavior. Good contact between Co/CoOx and amorphous carbon resulted in a high catalytic efficiency. The hybrid obtained under pyrolysis temperature of 600 °C exhibited the highest performance for OER, offering a stable current density of 10 mA cm-2 at 277 mV in basic media. Besides good OER behavior, it also showed good ORR performance [onset potential: ∼0.87 V vs. the reversible hydrogen electrode (RHE), diffusion-limiting current density: ∼4.9 mA cm-2 ]. This work describes a novel and efficient catalyst, and greatly expands the scope of low-cost Co-based electrocatalysts for various electrochemical reactions without the need for N-containing ligands.
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Affiliation(s)
- Min Li
- College of Chemistry, Jilin University, Changchun, 130023, P. R. China
| | - Lu Bai
- College of Chemistry, Jilin University, Changchun, 130023, P. R. China
| | - Shujie Wu
- College of Chemistry, Jilin University, Changchun, 130023, P. R. China
| | - Xudong Wen
- College of Chemistry, Jilin University, Changchun, 130023, P. R. China
| | - Jingqi Guan
- College of Chemistry, Jilin University, Changchun, 130023, P. R. China
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18
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Li Z, Hassan M, Sun A, Bo X, Zhou M. Crab Shell-Templated Fe and N Co-Doped Mesoporous Carbon Nanofibers as a Highly Efficient Oxygen Reduction Reaction Electrocatalyst. ChemistrySelect 2018. [DOI: 10.1002/slct.201800251] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zhenyi Li
- Laboratory of Nanobiosensing and Nanobioanalysis at University of Jilin Province; Department of Chemistry; Northeast Normal University; 5268 Renmin Street, Changchun Jilin Province 130024, P.R. China
| | - Mehboob Hassan
- Laboratory of Nanobiosensing and Nanobioanalysis at University of Jilin Province; Department of Chemistry; Northeast Normal University; 5268 Renmin Street, Changchun Jilin Province 130024, P.R. China
| | - An Sun
- Artificial Intelligence Key Laboratory of Sichuan Province; School of Automation and Information Engineering Sichuan University of Science and Engineering; Zigong 643000 Sichuan
| | - Xiangjie Bo
- Laboratory of Nanobiosensing and Nanobioanalysis at University of Jilin Province; Department of Chemistry; Northeast Normal University; 5268 Renmin Street, Changchun Jilin Province 130024, P.R. China
| | - Ming Zhou
- Laboratory of Nanobiosensing and Nanobioanalysis at University of Jilin Province; Department of Chemistry; Northeast Normal University; 5268 Renmin Street, Changchun Jilin Province 130024, P.R. China
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19
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Wu Z, Song M, Wang J, Liu X. Supramolecular gel assisted synthesis of Co2P nanosheets as an efficient and stable catalyst for oxygen reduction reaction. NEW J CHEM 2018. [DOI: 10.1039/c8nj01281d] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Co2P/C, with nanosheet morphology, is prepared through a facile supramolecular-gel assisted strategy which presents excellent electrocatalytic performance for ORR.
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Affiliation(s)
- Zexing Wu
- State Key Laboratory Base of Eco-chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao
- P. R. China
| | - Min Song
- State Key Laboratory Base of Eco-chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao
- P. R. China
| | - Jie Wang
- Department of Applied Physics
- The Hong Kong Polytechnic University
- Kowloon
- Hong Kong
| | - Xien Liu
- State Key Laboratory Base of Eco-chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao
- P. R. China
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20
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El-Shafai NM, El-Khouly ME, El-Kemary M, Ramadan MS, Masoud MS. Graphene oxide–metal oxide nanocomposites: fabrication, characterization and removal of cationic rhodamine B dye. RSC Adv 2018; 8:13323-13332. [PMID: 35542542 PMCID: PMC9079739 DOI: 10.1039/c8ra00977e] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 03/26/2018] [Indexed: 11/21/2022] Open
Abstract
The fabrication and characterization of graphene oxide (GO) nanosheets and their reaction with Fe3O4 and ZrO2 metal oxides to form two nanocomposites, namely graphene oxide–iron oxide (GO–Fe3O4) and graphene oxide–iron oxide–zirconium oxide (GO–Fe3O4@ZrO2), have been examined. The fabricated nanocomposites were examined using different techniques, e.g.transmission electron microscopy, X-ray diffraction, zeta potential measurement and Fourier transform infrared spectroscopy. Compared to GO, the newly fabricated GO–Fe3O4 and GO–Fe3O4@ZrO2 nanocomposites have the advantage of smaller band gaps, which result in increased adsorption capacity and photocatalytic effects. The results also showed the great effect of the examined GO–metal oxide nanocomposites on the decomposition of cationic rhodamine B dye, as indicated by steady-state absorption and fluorescence, time correlated single photon counting and nanosecond laser photolysis techniques. The antibacterial activity of the fabricated GO and GO–metal oxides has been studied against Gram-positive and Gram-negative bacteria. The fabrication and characterization of graphene oxide–iron oxide and graphene oxide–iron oxide–zirconium oxide nanocomposites have been reported. The decomposition of cationic rhodamine B dye by both nanocomposites has been examined.![]()
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Affiliation(s)
- Nagi M. El-Shafai
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Alexandria
- Egypt
| | - Mohamed E. El-Khouly
- Department of Chemistry
- Faculty of Science
- Kafrelsheikh University
- Kafr El-Sheikh 33516
- Egypt
| | - Maged El-Kemary
- Institute of Nanoscience and Nanotechnology
- Kafrelsheikh University
- Kafr El-Sheikh 33516
- Egypt
- Department of Chemistry
| | - Mohamed S. Ramadan
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Alexandria
- Egypt
| | - Mamdouh S. Masoud
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Alexandria
- Egypt
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21
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Ingavale SB, Patil IM, Parse HB, Ramgir N, Kakade B, Swami A. B,N,S tri-doped reduced graphite oxide–cobalt oxide composite: a bifunctional electrocatalyst for enhanced oxygen reduction and oxygen evolution reactions. NEW J CHEM 2018. [DOI: 10.1039/c8nj01138a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cobalt oxide with B,N,S tri-doped reduced graphite oxide exhibits synergistic effects to enhance ORR activity.
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Affiliation(s)
- Sagar B. Ingavale
- Department of Chemistry
- SRM Institute of Science & Technology
- Chennai
- India
| | - Indrajit M. Patil
- Department of Chemistry
- SRM Institute of Science & Technology
- Chennai
- India
- SRM Research Institute
| | - Haridas B. Parse
- Department of Chemistry
- SRM Institute of Science & Technology
- Chennai
- India
- SRM Research Institute
| | - Niranjan Ramgir
- Technical Physics Division
- Bhabha Atomic Research Center
- Mumbai – 400 085
- India
| | - Bhalchandra Kakade
- Department of Chemistry
- SRM Institute of Science & Technology
- Chennai
- India
- SRM Research Institute
| | - Anita Swami
- Department of Chemistry
- SRM Institute of Science & Technology
- Chennai
- India
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