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26 results on '"Tahir Farid, Hafiz Muhammad"'

14. One-Pot Formation of an rGO-Based ZnAl2O4Nanocomposite for Electrochemical Studies toward Oxygen Evolution Reactions

Author

Helal, Mohamed H., Thabet, Hamdy Khamees, Aman, Salma, Ahmad, Naseeb, Tahir Farid, Hafiz Muhammad, and El-Bahy, Zeinhom M.

Abstract

Electrocatalysts for water (H2O) splitting to give oxygen (O2) and hydrogen (H2) fuels are challenging to build, but mixing carbon materials with transition-metal-based compounds offers an intriguing and innovative method for the development of environment-friendly fuel. Hydrothermal synthesis is a cheap and effective catalyst based on a ZnAl2O4nanocomposite anchored over reduced graphene oxide (rGO) and is presented here, along with characterization by microscopy and spectroscopy. As a possible oxygen evolution reaction (OER) electrocatalyst on nickel foam’s surface (NF), the electrochemical properties of this catalyst were also studied. The electrochemical studies showed that the ZnAl2O4anchored on rGO sample exhibited high stability for the OER and an enhanced surface area, ionic conductivity, and active zones of the electrocatalyst was observed compared to that of the other investigated composites. It also exhibited an overpotential of 244 mV achieved at 10 mA cm–2and lowered solution resistance (Rs= 0.63 Ω) and charge transfer resistance (Rct= 0.6 Ω). This catalyst has a wide operating current range and, therefore, may function for long periods of time at both high and low current densities. High electrical conductivity, a larger surface area, and enriched active zones are responsible for enhancing the ZnAl2O4@rGO composite’s multifunctional qualities, as shown by the results. The electrocatalytic properties of ZnAl2O4@rGO composites were enhanced, and they exhibited a high cycling stability of 50 h even after the 5000th cycle due to the combined influence of these surface features. The present investigation has revealed that the ZnAl2O4@rGO nanocomposite demonstrates significant versatility, making it highly suitable for various fields related to sustainable and renewable energy. This suggests that it could be employed in developing an efficient and promising electrode for the OER, thereby paving the way for new possibilities.

Published
2024
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20. Novel Zn/Mn‐Based Perovskite (ZnMnO3) as Fabricated by a Sol‐Gel Method for Energy Storage Devices.

Author

Tahir Farid, Hafiz Muhammad, Noman Saeed, Muhammd, Gouadria, Soumaya, Farraj Alharbi, Fatemah, and Aman, Salma

Subjects
*ENERGY storage, *SOL-gel processes, *PEROVSKITE, *X-ray photoelectron spectroscopy, *ENERGY conversion
Abstract

Energy‐saving strategies and programs have been developed by the appropriate organizations in response to rising concerns about the pollution created by fossil fuels in the environment. Compared to conventional batteries, supercapacitors have several advantages than other, including faster charge and discharge times, higher power density, a longer cycle life, and fever negative effects on the environment. Researchers explored perovskite as a novel class of eco‐friendly electrodes for energy conversion devices. In this study, we developed ZnMnO3 via a sol gel route for supercapacitor application. The phases, structure, valance, morphology and surface of the material are determined by X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and Brunauer Emmett Teller (BET), respectively. The electrochemical behavior manifested that the fabricated perovskite exhibited high capacitive efficiency of 889 F g−1 at 1 A g−1. The GCD stability test displays the highest capacitive retention of 97 % after 5000 cycles and shows prolong the stability of 50 h. Our findings suggest that the perovskite exhibited the fascinating feature for supercapacitor application to replace the other polluted source of energy. [ABSTRACT FROM AUTHOR]

Published
2023
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22. Effect of yttrium ion on electrical and magnetic properties of barium based spinel ferrites

Author

Ramzan, Rabia, primary, Tariq, Muhammad, additional, Ashiq, Muhammad Naeem, additional, Albalawi, Hind, additional, Ahmad, Imtiaz, additional, Alhossainy, M.H., additional, Ejaz, Syeda Rabia, additional, Khosa, Rabia Yasmin, additional, Tahir Farid, Hafiz Muhammad, additional, Khan, Hasan M., additional, Al-Muhimeedh, Tahani I., additional, and AlObaid, Abeer A., additional

Published
2021
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