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Medany SS, Nafady A, Soomro RA, Hefnawy MA. Construction of chitosan-supported nickel cobaltite composite for efficient electrochemical capacitor and water-splitting applications. Sci Rep 2024; 14:2453. [PMID: 38291040 PMCID: PMC10827801 DOI: 10.1038/s41598-023-49692-z] [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: 08/11/2023] [Accepted: 12/11/2023] [Indexed: 02/01/2024] Open
Abstract
The construction of highly efficient electrode material is of considerable interest, particularly for high capacitance and water-splitting applications. Herein, we present the preparation of a NiCo2O4-Chitosan (NC@Chit) nanocomposite using a simple hydrothermal technique designed for applications in high capacitance and water-splitting. The structure/composition of the NC@Chit composite was characterized using different analytical methods, containing electron microscope (SEM and TEM), and powder X-ray diffraction (XRD). When configured as an anode material, the NC@Chit displayed a high capacitance of 234 and 345 F g-1 (@1Ag-1 for GC/NC and NC@Chit, respectively) in an alkaline electrolyte. The direct use of the catalyst in electrocatalytic water-splitting i.e., HER and OER achieved an overpotential of 240 mV and 310 mV at a current density of 10 mA cm-2, respectively. The obtained Tafel slopes for OER and HER were 62 and 71 mV dec-1, respectively whereas the stability and durability of the fabricated electrodes were assessed through prolonged chronoamperometry measurement at constant for 10 h. The electrochemical water splitting was studied for modified nickel cobaltite surface using an impedance tool, and the charge transfer resistances were utilized to estimate the electrode activity.
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Affiliation(s)
- Shymaa S Medany
- Chemistry Department, Faculty of Science, Cairo University, 12613, Giza, Egypt.
| | - Ayman Nafady
- Department of Chemistry, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Razium Ali Soomro
- State Key Laboratory of Chemical Resource Engineering School of Chemistry, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing, 100029, People's Republic of China
| | - Mahmoud A Hefnawy
- Chemistry Department, Faculty of Science, Cairo University, 12613, Giza, Egypt.
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Aftab U, Solangi MY, Tahira A, Hanan A, Abro MI, Karsy A, Dawi E, Bhatti MA, Alshammari RH, Nafady A, Gradone A, Mazzaro R, Morandi V, Infantes-Molina A, Ibupoto ZH. An advanced PdNPs@MoS 2 nanocomposite for efficient oxygen evolution reaction in alkaline media. RSC Adv 2023; 13:32413-32423. [PMID: 37928849 PMCID: PMC10623383 DOI: 10.1039/d3ra04738e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 10/23/2023] [Indexed: 11/07/2023] Open
Abstract
In response to the increasing availability of hydrogen energy and renewable energy sources, molybdenum disulfide (MoS2)-based electrocatalysts are becoming increasingly important for efficient electrochemical water splitting. This study involves the incorporation of palladium nanoparticles (PdNPs) into hydrothermally grown MoS2via a UV light assisted process to afford PdNPs@MoS2 as an alternative electrocatalyst for efficient energy storage and conversion. Various analytical techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and energy dispersive spectroscopy (EDS), were used to investigate the morphology, crystal quality, and chemical composition of the samples. Although PdNPs did not alter the MoS2 morphology, oxygen evolution reaction (OER) activity was driven at considerable overpotential. When electrochemical water splitting was performed in 1.0 M KOH aqueous solution with PdNPs@MoS2 (sample-2), an overpotential of 253 mV was observed. Furthermore, OER performance was highly favorable through rapid reaction kinetics and a low Tafel slope of 59 mV dec-1, as well as high durability and stability. In accordance with the electrochemical results, sample-2 showed also a lower charge transfer resistance, which again provided evidence of OER activity. The enhanced OER activity was attributed to a number of factors, including structural, surface chemical compositions, and synergistic effects between MoS2 and PdNPs.
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Affiliation(s)
- Umair Aftab
- Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology 76080 Jamshoro Pakistan
| | - Muhammad Yameen Solangi
- Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology 76080 Jamshoro Pakistan
| | - Aneela Tahira
- Institute of Chemistry, Shah Abdul Latif University Khairpur Mirs Sindh Pakistan
| | - Abdul Hanan
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University 150001 Harbin PR China
| | - Muhammad Ishaq Abro
- Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology 76080 Jamshoro Pakistan
| | - Amal Karsy
- Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE) Cairo Egypt
| | - Elmuez Dawi
- Nonlinear Dynamics Research Center (NDRC), Ajman University Ajman P.O. Box 346 United Arab Emirates
| | - Muhammad Ali Bhatti
- Institute of Environmental Sciences, University of Sindh Jamshoro Jamshoro 76080 Sindh Pakistan
| | - Riyadh H Alshammari
- Department of Chemistry, College of Science, King Saud University Riyadh 11451 Saudi Arabia
| | - Ayman Nafady
- Department of Chemistry, College of Science, King Saud University Riyadh 11451 Saudi Arabia
| | | | - Raffaello Mazzaro
- CNR IMM Via Piero Gobetti 101 40129 Bologna Italy
- Department of Physics and Astronomy, University of Bologna Via Berti Pichat 6/2 40127 Bologna Italy
| | | | - Antonia Infantes-Molina
- Department of Inorganic Chemistry, Crystallography and Mineralogy, (Unidad Asociada al ICP-CSIC), Faculty of Sciences, University of Malaga Campus de Teatinos 29071 Malaga Spain
| | - Zafar Hussain Ibupoto
- Dr. M. A. Kazi Institute of Chemistry University of Sindh Jamshoro 76080 Sindh Pakistan
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Bai J, Deng Y, Lian Y, Zhou Q, Zhang C, Su Y. WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution. Molecules 2023; 28:7040. [PMID: 37894519 PMCID: PMC10609438 DOI: 10.3390/molecules28207040] [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: 08/28/2023] [Revised: 09/16/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Single-atom catalysts anchored to oxide or carbonaceous substances are typically tightly coordinated by oxygen or heteroatoms, which certainly impact their electronic structure and coordination environment, thereby affecting their catalytic activity. In this study, we prepared a stable oxygen evolution reaction (OER) catalyst on tungsten carbide using a simple pyrolysis method. The unique structure of tungsten carbide allows the atomic RuNi catalytic site to weakly bond to the surface W and C atoms. XRD patterns and HRTEM images of the WCx-RuNi showed the characteristics of phase-pure WC and W2C, and the absence of nanoparticles. Combined with XPS, the atomic dispersion of Ru/Ni in the catalyst was confirmed. The catalyst exhibits excellent catalytic ability, with a low overpotential of 330 mV at 50 mA/cm2 in 1 m KOH solutions, and demonstrates high long-term stability. This high OER activity is ascribed to the synergistic action of metal Ru/Ni atoms with double monomers. The addition of Ni increases the state density of WCx-RuNi near the Fermi level, promoting the adsorption of oxygen-containing intermediates and enhancing electron exchange. The larger proximity of the d band center to the Fermi level suggests a strong interaction between the d electrons and the valence or conduction band, facilitating charge transfer. Our research offers a promising avenue for reasonable utilization of inexpensive and durable WCx carrier-supported metal single-atom catalysts for electrochemical catalysis.
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Affiliation(s)
- Jirong Bai
- Research Center of Secondary Resources and Environment, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou 213022, China; (J.B.); (Y.D.); (Y.L.); (Q.Z.)
| | - Yaoyao Deng
- Research Center of Secondary Resources and Environment, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou 213022, China; (J.B.); (Y.D.); (Y.L.); (Q.Z.)
| | - Yuebin Lian
- Research Center of Secondary Resources and Environment, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou 213022, China; (J.B.); (Y.D.); (Y.L.); (Q.Z.)
| | - Quanfa Zhou
- Research Center of Secondary Resources and Environment, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou 213022, China; (J.B.); (Y.D.); (Y.L.); (Q.Z.)
- School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
| | - Chunyong Zhang
- School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
| | - Yaqiong Su
- School of Chemistry, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China
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Eliwa AS, Hefnawy MA, Medany SS, Deghadi RG, Hosny WM, Mohamed GG. Synthesis and characterization of lead-based metal-organic framework nano-needles for effective water splitting application. Sci Rep 2023; 13:12531. [PMID: 37532800 PMCID: PMC10397286 DOI: 10.1038/s41598-023-39697-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 07/29/2023] [Indexed: 08/04/2023] Open
Abstract
Metal organic frameworks (MOFs) are a class of porous materials characterized by robust linkages between organic ligands and metal ions. Metal-organic frameworks (MOFs) exhibit significant characteristics such as high porosity, extensive surface area, and exceptional chemical stability, provided the constituent components are meticulously selected. A metal-organic framework (MOF) containing lead and ligands derived from 4-aminobenzoic acid and 2-carboxybenzaldehyde has been synthesized using the sonochemical methodology. The crystals produced were subjected to various analytical techniques such as Fourier-transform infrared spectroscopy (FT-IR), Powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Brunauer-Emmett-Teller (BET), and thermal analysis. The BET analysis yielded results indicating a surface area was found to be 1304.27 m2 g-1. The total pore volume was estimated as 2.13 cm3 g-1 with an average pore size of 4.61 nm., rendering them highly advantageous for a diverse range of practical applications. The activity of the modified Pb-MOF electrode was employed toward water-splitting applications. The electrode reached the current density of 50 mA cm-2 at an overpotential of - 0.6 V (vs. RHE) for hydrogen evolution, and 50 mA cm-2 at an overpotential of 1.7 V (vs. RHE) for oxygen evolution.
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Affiliation(s)
- Ayman S Eliwa
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Mahmoud A Hefnawy
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt.
| | - Shymaa S Medany
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Reem G Deghadi
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Wafaa M Hosny
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Gehad G Mohamed
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt.
- Nanoscience Department, Basic and Applied Sciences Institute, Egypt-Japan University of Science and Technology, Alexandria, Egypt.
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