A novel cobalt tungstate and reduced graphene oxide composite for hydrogen evolution reaction in acid medium

Chandrasekaran, Sharmila; Elangovan, Arumugam; Karuppiah, Chelladurai; Sudha, Karuppaiah; Haidyrah, Ahmed S.; Chandran, Bhuvaneswari; Yang, Chun‐Chen

doi:10.1016/j.matlet.2021.130274

Cited by 8 publications

(6 citation statements)

References 18 publications

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“…The obtained CZO/rGO nanocomposite was employed in subsequent electrochemical modification experiments. 14 2.5. Fabrication CZO/rGO Nanocomposite.…”

Section: Preparation Rgomentioning

confidence: 99%

“…Metal oxide nanoparticles (NPs) have recently garnered significant attention in electrocatalysis due to their selectivity, 12 prolonged lifetime, 13 and high catalytic activity in preparation methods. 14 Cerium, being one of the rare catalytic metals, possesses two partially filled electron subshells (5d and 4f). Many technological applications leverage cerium oxide, also known as ceria (CeO 2 ).…”

Section: Introductionmentioning

confidence: 99%

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Cerium Zirconium Oxide-Decorated Reduced Graphene Oxide Nanocomposite for Low Potential Voltammetric Detection of N-Hydroxysuccinimide

Chandran,

Ramasamy,

Ponnaiah

et al. 2024

ACS Appl. Nano Mater.

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The necessity for highly sensitive and precise methodologies for monitoring water quality and safety is imperative. The substantial health risks linked with Nhydroxysuccinimide (NHS) in water samples and its contact with the skin and eyes are noteworthy. Despite the utilization of numerous techniques for NHS analysis, the adoption of a rapid and uncomplicated electrochemical process has been infrequent. This article details the fabrication of an electrochemical NHS detection system using a cerium zirconium oxide (CZO)-doped reduced graphene oxide (rGO) nanocomposite. The CZO/ rGO nanocomposite was prepared through a straightforward method involving precipitation and sonication. Structural analysis of the CZO/rGO involved various techniques, including X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), Raman spectroscopy, field emission scanning electron microscopy (FE-SEM), elemental mapping, energy dispersive X-ray analysis (EDX), and X-ray photoelectron spectroscopy analysis (XPS). Crucial kinetic parameters, such as the effective surface area, were evaluated for CZO/rGO on the glassy carbon electrode (GCE). Additionally, the CZO/rGO/GCE showcased reduced charge transfer resistance (R ct = 99 Ω), exceptional electrochemical activity, a high electron transfer rate, and strong selectivity. This electrode demonstrated excellent electrochemical sensing capabilities for NHS, boasting an extremely low detection limit (0.045 μM) and heightened sensitivity of 0.020 μA μM −1 cm −2 . Demonstrating its potential for swiftly detecting NHS in river water, the CZO/rGO/GCE sensor achieved over 97% recovery. This approach is particularly well-suited for creating water pollution sensors in various sensing devices.

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“…The obtained CZO/rGO nanocomposite was employed in subsequent electrochemical modification experiments. 14 2.5. Fabrication CZO/rGO Nanocomposite.…”

Section: Preparation Rgomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cerium Zirconium Oxide-Decorated Reduced Graphene Oxide Nanocomposite for Low Potential Voltammetric Detection of N-Hydroxysuccinimide

Chandran,

Ramasamy,

Ponnaiah

et al. 2024

ACS Appl. Nano Mater.

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“…According to the recent literature [106,107], structural refinement data obtained employing Rietveld method and group theory calculations. CoWO 4 crystals exhibited a wolframite-type monoclinic structure, which is composed and formed only by distorted octahedral [CoO 6 ] and [WO 6 ] clusters.…”

Section: Micro-raman Spectra Analysismentioning

confidence: 99%

Investigation of electronic structure, morphological features, optical, colorimetric, and supercapacitor electrode properties of CoWO4 crystals

Oliveira

Gouveia

Costa

et al. 2022

Materials Science for Energy Technologies

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“…The assembled cell with amorphous Fe-doped CoWO 4 as both an anode and cathode achieved a current density of 10 mA cm −2 at a low cell voltage of 1.55 V. 38 Also, Chandrasekaran et al fabricated an electrocatalyst using cobalt tungstate nanoparticle-embedded reduced graphene oxide (CoWO 4 @rGO) for HER in acidic medium, which showed an overpotential of 570 mV for 10 mA cm −2 benchmark current density. 39 Exceptional merits such as high-power density, superfast charging−discharging, cost-effectiveness, long life, and environmental friendliness have brought attention to supercapacitors (SCs). 40,41 Due to these unique features, supercapacitors have large potential applications in the energy storage sector, such as memory backup for electronic devices, hybrid electric vehicles, and computers.…”

Section: Introductionmentioning

confidence: 99%

“…The assembled cell with amorphous Fe-doped CoWO 4 as both an anode and cathode achieved a current density of 10 mA cm –2 at a low cell voltage of 1.55 V . Also, Chandrasekaran et al fabricated an electrocatalyst using cobalt tungstate nanoparticle-embedded reduced graphene oxide (CoWO 4 @rGO) for HER in acidic medium, which showed an overpotential of 570 mV for 10 mA cm –2 benchmark current density …”

Section: Introductionmentioning

confidence: 99%

Multifunctional CoWO₄ 2D Array Electrode for Electrocatalytic Overall Water Splitting and Supercapacitor Application

Arumugam,

Murugesan,

Chettiannan

et al. 2024

Energy Fuels

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Rational design and construction of 2D materials play a crucial role in energy storage and conversion technologies. Herein, we used a cation-exchange strategy, followed by a thermal treatment to develop CoWO 4 2D sheets using Co-MOF as a template. The porous rough CoWO 4 2D sheets integrated on the nickel foam displayed an excellent electrocatalytic performance toward oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) at an overpotential of 177 and 139 mV to realize the benchmark current density of 10 mA cm −1 . Moreover, we demonstrated the OER and HER performance in a single cell using 2D-CoWO 4 @NF as a cathode and an anode and delivered 10 mA cm -2 current density at a cell potential of 1.51 V. The supercapacitor performance of 2D-CoWO 4 @NF was also investigated, which exhibited a specific capacity of 1196.7 C g −1 (2659.3 F g −1 ) at a current density of 3 A g −1 in a three-electrode system. An asymmetric device was constructed using 2D-CoWO 4 @NF as the positive and activated charcoal (AC) as the negative electrode, which delivered an energy density of 79 W h kg −1 at a power density of 2.25 kW kg −1 .

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A novel cobalt tungstate and reduced graphene oxide composite for hydrogen evolution reaction in acid medium

Cited by 8 publications

References 18 publications

Cerium Zirconium Oxide-Decorated Reduced Graphene Oxide Nanocomposite for Low Potential Voltammetric Detection of N-Hydroxysuccinimide

Cerium Zirconium Oxide-Decorated Reduced Graphene Oxide Nanocomposite for Low Potential Voltammetric Detection of N-Hydroxysuccinimide

Investigation of electronic structure, morphological features, optical, colorimetric, and supercapacitor electrode properties of CoWO4 crystals

Multifunctional CoWO₄ 2D Array Electrode for Electrocatalytic Overall Water Splitting and Supercapacitor Application

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A novel cobalt tungstate and reduced graphene oxide composite for hydrogen evolution reaction in acid medium

Cited by 8 publications

References 18 publications

Cerium Zirconium Oxide-Decorated Reduced Graphene Oxide Nanocomposite for Low Potential Voltammetric Detection of N-Hydroxysuccinimide

Cerium Zirconium Oxide-Decorated Reduced Graphene Oxide Nanocomposite for Low Potential Voltammetric Detection of N-Hydroxysuccinimide

Investigation of electronic structure, morphological features, optical, colorimetric, and supercapacitor electrode properties of CoWO4 crystals

Multifunctional CoWO4 2D Array Electrode for Electrocatalytic Overall Water Splitting and Supercapacitor Application

Contact Info

Product

Resources

About

Multifunctional CoWO₄ 2D Array Electrode for Electrocatalytic Overall Water Splitting and Supercapacitor Application