Development of bifunctional Mo doped ZnAl2O4 spinel nanorods array directly grown on carbon fiber for supercapacitor and OER application

Gouadria, Soumaya; Abudllah, Muhammad; Ahmad, Zahoor; John, Peter; Nisa, Mehar Un; Manzoor, Sumaira; Aman, Salma; Ashiq, Muhammad Naeem; Ghori, Muhammad Ishfaq

doi:10.1016/j.ceramint.2022.09.312

Cited by 57 publications

(10 citation statements)

References 58 publications

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“…In addition to the exceptional OER activity, the HER performance of the developed sustainable electrode is even more superior showing the capacity of the SrO-ZnO nanocomposite embellished nickel foam electrode towards electro-reduction and production of the H 2 in its purest form. [63][64][65][66][67] This is expressed by the effectively lower HER overpotential (η OER ) in addition to lower Tafel slope of 126 mV and 123.6 mV dec À1 . The results obtained for the SrO-ZnO nanocomposite are in compliance with the other efficient materials.…”

Section: Electrochemically Driven Water Splittingmentioning

confidence: 99%

Enhancing the Electrical and Photoelectrical Efficacy with the Synergistic SrO–ZnO Nano‐Heterosystem

Jaffri,

Ahmad,

Abrahams

et al. 2024

Energy Tech

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Development of the sustainable materials for consolidation of the energy sustainability needs special emphasis in the current era of the increasing energy demand. In compliance with this, present investigation reports first investigation on the amended sustainable production conjugated with the microwave process of the strontium oxide (SrO) and zinc oxid (ZnO) forming SrO–ZnO nanoscale heterostructure. The band gap of the prepared green nanomaterial was tuned reducing it from 5.8 to 3.6 eV upon the formation of the nanocomposite. With the mixed cubic and hexagonal phase, these particles have average crystallite size of 66.4 nm and irregular shape. The electro‐catalytic assays have expressed the bifunctional role of the SrO–ZnO towards generation of the oxygen and hydrogen. However, it has an excellent hydrogen production capacity with the lower overpotential of 126 mV and Tafel slopes 123.6 mV dec−1. In addition, this nanomaterial has also exhibited superior electrochemical charge storage for batter applications with the unit capacity of 541.7 mAH g−1 and Rs = 0.4 Ω, reflecting facilitated diffusion at the interface. In terms of photovoltaic applications, SrO–ZnO nanocomposite has effectively passivated the perovskite solar cells by improving efficiency from 7.2% to 15.1%. Such an improved performance is associated with the chemical synergism.

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Section: Electrochemically Driven Water Splittingmentioning

confidence: 99%

Enhancing the Electrical and Photoelectrical Efficacy with the Synergistic SrO–ZnO Nano‐Heterosystem

Jaffri,

Ahmad,

Abrahams

et al. 2024

Energy Tech

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“…Materials that are derived from precious metals are not suitable for both the OER and HER owing to their significant price, restricted availability, and lack of adequate bifunctionality. − There is a need to conduct research on nonprecious catalysts that possess a combination of excellent catalytic performance, cheap cost, and long-lasting stability to meet the needs of industrial demand. − Metal nanocomposites have been broadly used as catalysts for the HER and the OER for several years. The nanocomposites under consideration encompass a range of materials, including hydroxides, , oxides, , carbides, − selenides, , sulfides, , and phosphates. , The abundance, cost-effectiveness, and synergistic properties of zinc metal hydroxides and oxides have drawn substantial interest as potential catalysts.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Formation of an rGO-Based ZnAl₂O₄ Nanocomposite for Electrochemical Studies toward Oxygen Evolution Reactions

Helal,

Thabet,

Aman

et al. 2024

Energy Fuels

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Electrocatalysts for water (H 2 O) splitting to give oxygen (O 2 ) and hydrogen (H 2 ) 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 ZnAl 2 O 4 nanocomposite 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 ZnAl 2 O 4 anchored 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 −2 and lowered solution resistance (R s = 0.63 Ω) and charge transfer resistance (R ct = 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 ZnAl 2 O 4 @ rGO composite's multifunctional qualities, as shown by the results. The electrocatalytic properties of ZnAl 2 O 4 @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 ZnAl 2 O 4 @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.

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“…In recent years, the energy crisis has been worsening and the environment has been gradually destroyed. 1 Hydrogen (H 2 ) is regarded as an ideal energy source because of its clean and renewable characteristics. 2 As one of the production methods of hydrogen, electrocatalytic water-splitting has become very attractive.…”

Section: Introductionmentioning

confidence: 99%

An in situ formed ZIF-67 derived NiFeCo-P nano-array for accelerating the electrocatalytic oxygen evolution reaction

Guo,

Li,

Wang

et al. 2024

Energy Adv.

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Development of bifunctional Mo doped ZnAl2O4 spinel nanorods array directly grown on carbon fiber for supercapacitor and OER application

Cited by 57 publications

References 58 publications

Enhancing the Electrical and Photoelectrical Efficacy with the Synergistic SrO–ZnO Nano‐Heterosystem

Enhancing the Electrical and Photoelectrical Efficacy with the Synergistic SrO–ZnO Nano‐Heterosystem

One-Pot Formation of an rGO-Based ZnAl₂O₄ Nanocomposite for Electrochemical Studies toward Oxygen Evolution Reactions

An in situ formed ZIF-67 derived NiFeCo-P nano-array for accelerating the electrocatalytic oxygen evolution reaction

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Development of bifunctional Mo doped ZnAl2O4 spinel nanorods array directly grown on carbon fiber for supercapacitor and OER application

Cited by 57 publications

References 58 publications

Enhancing the Electrical and Photoelectrical Efficacy with the Synergistic SrO–ZnO Nano‐Heterosystem

Enhancing the Electrical and Photoelectrical Efficacy with the Synergistic SrO–ZnO Nano‐Heterosystem

One-Pot Formation of an rGO-Based ZnAl2O4 Nanocomposite for Electrochemical Studies toward Oxygen Evolution Reactions

An in situ formed ZIF-67 derived NiFeCo-P nano-array for accelerating the electrocatalytic oxygen evolution reaction

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One-Pot Formation of an rGO-Based ZnAl₂O₄ Nanocomposite for Electrochemical Studies toward Oxygen Evolution Reactions