Evaluation of electrodes composed of europium tungstate/reduced graphene oxide nanocomposite for use as supercapacitors

Naderi, Hassan; Nadri, Pooya; Sorouri, Amir Mohammad; Ganjali, Mohammad Reza; Ehrlich, Hermann; Rahimi‐Nasrabadi, Mehdi; Ahmadi, Farhad

doi:10.1016/j.surfin.2022.102002

Cited by 8 publications

(2 citation statements)

References 44 publications

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“…In supercapacitors, the cycling stability, energy, and power density are important factors for practical use. − The cycling stability of the MNWC composite electrode was tested using GCD at a current density of 5 A g –1 for up to 2000 cycles. The MNWC composite electrode exhibited excellent stability with 92% capacity retention.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis and Characterization of Novel Carbon Nanofiber-Doped MWO₄ (M–Mn, Co, Ni, Mn–Co, Mn–Ni, Ni–Co)-Based Nanostructured Electrode Materials for Application in Electrochemical Supercapacitors and Photoelectrochemical Water Splitting

et al. 2022

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More efficient, clean, and renewable energy sources must be developed to replace fossil fuels and protect the environment from their harmful effects. Electrochemical energy storage devices and energy conversion (hydrogen production) sources are two effective approaches for replacing fossil fuels. Herein, single metal tungstates, such as MnWO 4 flakes, NiWO 4 nanoparticles, and CoWO 4 nanoparticles, as well as bimetallic tungstates, such as MnNiWO 4 , MnCoWO 4 , and NiCoWO 4 , were synthesized using a simple hydrothermal method. Furthermore, carbon nanofibers (CNFs) were adopted to modify bimetallic tungstate to improve the electron transfer and extraction of electron−hole pairs. To modify the CNFs with bimetallic tungstate as a composite electrode, a simple and convenient process called the wet impregnation method was employed. The resulting composite materials exhibited better performances in supercapacitor and photoelectrochemical water-splitting studies than those of single and bimetallic tungstates. The hybrid composite, MnNiWO 4 /CNF, showed a high specific capacity of 1374 F g −1 at a current density of 0.5 A g −1 in a three-electrode configuration, owing to its nonfaradaic and faradaic processes. This performance was 4.2, 10.3, and 3 orders of magnitude higher than those of MnWO 4 , NiWO 4 , and MnNiWO 4 electrodes, respectively. In photoelectrochemical water-splitting studies, the development of heterostructures decreases electron−hole recombination and improves interfacial charge transfer in composite materials. In this study, the MnNiWO 4 /CNF nanocomposite material exhibited a maximum applied bias photon-to-current efficiency (ABPE) of 3.47%, approximately 6, 6, and 2 orders of magnitude higher than those of bare MnWO 4 , NiWO 4 , and MnNiWO 4 , respectively, under illumination. The crystallinities, morphologies, absorptions, and chemical compositions of the synthesized materials were investigated using electrochemical and spectroscopic techniques. The results indicate that the synthesized hybrid materials could be promising candidates as electrode materials for remarkable supercapacitor and photoelectrochemical water-splitting applications.

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Section: Resultsmentioning

confidence: 99%

Facile Synthesis and Characterization of Novel Carbon Nanofiber-Doped MWO₄ (M–Mn, Co, Ni, Mn–Co, Mn–Ni, Ni–Co)-Based Nanostructured Electrode Materials for Application in Electrochemical Supercapacitors and Photoelectrochemical Water Splitting

et al. 2022

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“…However, among carbonaceous materials, graphene, graphene oxide (GO), and reduced graphene oxide (rGO) materials have led to attract newer technologies with remarkable improvements in their attributes [6,7]. Moreover, physical and chemical and mechanical performance of several nanomaterials can be enhanced by many folds via the synergetic development of graphene materials and nanomaterials [8][9][10][11][12]. Even after a decade of research, the challenge still exists in synthesizing synergetic behavioural materials at ease for mass production [13].…”

Section: Introductionmentioning

confidence: 99%

Laser-induced in situ synthesis of nano-composite Co–Co₃O₄–rGO on paper: miniaturized biosensor for alkaline phosphatase detection

2023

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Recent progress in the in situ synthesise of various nanomaterials has gained tremendous interest and wide applications in various fields. For the first time to the best of our knowledge, this work reports a methodology of ultra-fast in situ synthesis of cobalt–cobalt oxide-reduced graphene oxide (Co−Co3O4−rGO (CC–rGO)) composite by laser ablation. The photothermal reduction technique was leveraged to develop the CC–rGO. For this, a low-cost 450 nm blue diode laser was irradiated onto a grade 1 filter paper in the presence of cobalt ions readily patterns the carbon matrix of paper to the composite material. Moreover, the variation of cobalt concentrations from 0.1–0.5 M led to structural and morphological changes. Standard techniques were adopted for thorough characterizations of developed sensor material for conductivity analysis, specific surface area, crystal-structural information, surface morphology, and chemical composition. The observed results were highly promoting towards the electrochemical sensing applications. Further, the developed sensor was found to be highly selective toward detecting a vital bio analyte alkaline phosphatase (ALP). The sensors performance was highly significant in the linear range of 10–800 mU l−1 with a detection limit of 10.13 mU l−1. The sensors applicability was further validated in actual human serum samples via a recovery-based approach. In the future, the developed in situ material methodology can begin a rapid composite material synthesis at a larger scale.

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Metal tungstates nanostructures for supercapacitors: A review

Sorouri

Sobhani‐Nasab

Ganjali

et al. 2023

Applied Materials Today

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Evaluation of electrodes composed of europium tungstate/reduced graphene oxide nanocomposite for use as supercapacitors

Cited by 8 publications

References 44 publications

Facile Synthesis and Characterization of Novel Carbon Nanofiber-Doped MWO₄ (M–Mn, Co, Ni, Mn–Co, Mn–Ni, Ni–Co)-Based Nanostructured Electrode Materials for Application in Electrochemical Supercapacitors and Photoelectrochemical Water Splitting

Facile Synthesis and Characterization of Novel Carbon Nanofiber-Doped MWO₄ (M–Mn, Co, Ni, Mn–Co, Mn–Ni, Ni–Co)-Based Nanostructured Electrode Materials for Application in Electrochemical Supercapacitors and Photoelectrochemical Water Splitting

Laser-induced in situ synthesis of nano-composite Co–Co₃O₄–rGO on paper: miniaturized biosensor for alkaline phosphatase detection

Metal tungstates nanostructures for supercapacitors: A review

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Evaluation of electrodes composed of europium tungstate/reduced graphene oxide nanocomposite for use as supercapacitors

Cited by 8 publications

References 44 publications

Facile Synthesis and Characterization of Novel Carbon Nanofiber-Doped MWO4 (M–Mn, Co, Ni, Mn–Co, Mn–Ni, Ni–Co)-Based Nanostructured Electrode Materials for Application in Electrochemical Supercapacitors and Photoelectrochemical Water Splitting

Facile Synthesis and Characterization of Novel Carbon Nanofiber-Doped MWO4 (M–Mn, Co, Ni, Mn–Co, Mn–Ni, Ni–Co)-Based Nanostructured Electrode Materials for Application in Electrochemical Supercapacitors and Photoelectrochemical Water Splitting

Laser-induced in situ synthesis of nano-composite Co–Co3O4–rGO on paper: miniaturized biosensor for alkaline phosphatase detection

Metal tungstates nanostructures for supercapacitors: A review

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Facile Synthesis and Characterization of Novel Carbon Nanofiber-Doped MWO₄ (M–Mn, Co, Ni, Mn–Co, Mn–Ni, Ni–Co)-Based Nanostructured Electrode Materials for Application in Electrochemical Supercapacitors and Photoelectrochemical Water Splitting

Facile Synthesis and Characterization of Novel Carbon Nanofiber-Doped MWO₄ (M–Mn, Co, Ni, Mn–Co, Mn–Ni, Ni–Co)-Based Nanostructured Electrode Materials for Application in Electrochemical Supercapacitors and Photoelectrochemical Water Splitting

Laser-induced in situ synthesis of nano-composite Co–Co₃O₄–rGO on paper: miniaturized biosensor for alkaline phosphatase detection