Synthesis, characterization, multifunctional electrochemical (OGR/ORR/SCs) and photodegradable activities of ZnWO4 nanobricks

Alshehri, Saad M.; Ahmed, Jahangeer; Ahamad, Tansir; Alhokbany, Norah; Arunachalam, Prabhakarn; Al‐Mayouf, Abdullah M.; Ahmad, Tokeer

doi:10.1007/s10971-018-4698-7

Cited by 62 publications

(33 citation statements)

References 55 publications

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“…Pt, Ir, Ru and their oxide-based catalysts have been developed for oxidation-reduction reactions [6][7][8]. Various other earth-abundant metal-based catalysts such as Mn, Fe, Co, Cu and W were also reported for their role in water splitting reactions [9][10][11][12][13]. In a previous research era, stupendous research has been done in the fabrication of active electrode material for oxygen evolution reactions (OERs).…”

Section: Introductionmentioning

confidence: 99%

Efficient Multifunctional Catalytic and Sensing Properties of Synthesized Ruthenium Oxide Nanoparticles

et al. 2020

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Ruthenium oxide is one of the most active electrocatalyst for oxygen evolution (OER) and oxygen reduction reaction (ORR). Herein, we report simple wet chemical route to synthesize RuO2 nanoparticles at controlled temperature. The structural, morphological and surface area studies of the synthesized nanoparticles were conducted with X-ray diffraction, electron microscopy and BETsurface area studies. The bifunctional electrocatalytic performance of RuO2 nanoparticles was studied under different atmospheric conditions for OER and ORR, respectively, versus reversible hydrogen electrode (RHE) in alkaline medium. Low Tafel slopes of RuO2 nanoparticles were found to be ~47 and ~49 mV/dec for OER and ORR, respectively, in oxygen saturated 0.5 M KOH system. Moreover, the catalytic activity of RuO2 nanoparticles was examined against the Horseradish peroxidase enzyme (HRP) at high temperature, and the nanoparticles were applied as a sensor for the detection of H2O2 in the solution.

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Section: Introductionmentioning

confidence: 99%

Efficient Multifunctional Catalytic and Sensing Properties of Synthesized Ruthenium Oxide Nanoparticles

et al. 2020

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“…It is cost-effective, cheap, efficient, and ecofriendly. 1−3 Water electrolysis by electrocatalysts through electrochemical water splitting will give promising output for pure and sustainable energy applications. 4,5 Precious metals such as platinum (Pt), ruthenium (Ru), iridium (Ir), and so forth have shown almost benchmark results of energy storage applications.…”

Section: Introductionmentioning

confidence: 99%

Bi₂WO₆ and FeWO₄ Nanocatalysts for the Electrochemical Water Oxidation Process

et al. 2019

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Polyvinylpyrrolidone (PVP)-assisted nanocatalyst preparation was succeeded by employing a controlled solvothermal route to produce efficient electrodes for electrochemical water-splitting applications. Bi 2 WO 6 and FeWO 4 nanocatalysts have been confirmed through the strong signature of (113) and (111) crystal planes, respectively. The binding natures of Bi–W–O and Fe–W–O have been thoroughly discussed by employing X-ray photoelectron spectroscopy which confirmed the formation of Bi 2 WO 6 and FeWO 4 . The freestanding nanoplate array morphology of Bi 2 WO 6 and the fine nanosphere particle morphology of FeWO 4 nanocatalysts were revealed by scanning electron microscopy images. With these confirmations, the fabrication of durable, long-term electrodes for electrochemical water splitting has been subjected to efficient oxidation of water, confirmed by obtaining 2.79 and 1.96 mA/g for 0.5 g PVP-assisted Bi 2 WO 6 and FeWO 4 nanocatalysts, respectively. The water oxidation mechanism of both nanocatalysts has been revealed with the support of 24 h stability test over continuous water oxidation and faster charge transfer achieved by the smaller Tafel slope values of 75 and 78 mV/dec, respectively. Generally, these nanocatalysts are utilized for photocatalytic applications. The present study revealed the PVP-assisted synthesis to produce electrocatalytically active nanocatalysts and their electrochemical water-splitting mechanism which will offer a pathway for research interests with regard to the production of multifunctional nanocatalysts for both electro- and photocatalytic applications in the near future.

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“…10 Not only metal oxides, few nanosized complex metal oxides such as ZnWO 4 , CuWO 4 , CuCrO 2 , and CoWO 4 have shown significant photocatalytic and electrocatalytic performances. 11−14 Later, different metal oxide nanoparticles like niobates and tantalates were explored for their photocatalytic activity in water splitting and removal of organic contaminants from water. 15,16 NaTaO 3 , being an important member of tantalate perovskites, has been explored extensively for its photocatalytic water splitting activity due to its stability and structural flexibility.…”

Section: Introductionmentioning

confidence: 99%

High-Surface-Area Sodium Tantalate Nanoparticles with Enhanced Photocatalytic and Electrical Properties Prepared through Polymeric Citrate Precursor Route

et al. 2019

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NaTaO3 nanoparticles with a high surface area of 46.2 m2/g have been successfully synthesized using a polymeric citrate precursor route. As-prepared nanoparticles were extensively characterized by X-ray diffraction, Fourier transform infrared, transmission emission microscopy, and scanning electron microscopy studies for the analysis of phase purity, crystallinity, and morphology. NaTaO3 nanoparticles show efficient photo-induced removal of the methylene blue dye under sunlight, which were confirmed by using liquid chromatography–mass spectroscopy. 86% dye has been degraded in 200 min at neutral pH, whereas the same amount of dye was decolorized in only 80 min at alkaline pH. Also, the dielectric behavior of the as-prepared nanoparticles at different annealing temperatures was explained by the Maxwell–Wagner polarization mechanism. At 500, 600, and 700 °C annealing temperatures, the dielectric constant and dielectric loss at 500 kHz for the samples were found to be 21.5, 18, and 16 and 0.012, 0.022, and 0.029, respectively. The unsaturated hysteresis loop shows weak ferroelectric behavior of NaTaO3 nanoparticles with remanent and saturation polarizations of 0.0013 and 0.21 μC/cm2, respectively, and S-E hysteresis shows a bipolar strain of 0.10%.

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Synthesis, characterization, multifunctional electrochemical (OGR/ORR/SCs) and photodegradable activities of ZnWO4 nanobricks

Cited by 62 publications

References 55 publications

Efficient Multifunctional Catalytic and Sensing Properties of Synthesized Ruthenium Oxide Nanoparticles

Efficient Multifunctional Catalytic and Sensing Properties of Synthesized Ruthenium Oxide Nanoparticles

Bi₂WO₆ and FeWO₄ Nanocatalysts for the Electrochemical Water Oxidation Process

High-Surface-Area Sodium Tantalate Nanoparticles with Enhanced Photocatalytic and Electrical Properties Prepared through Polymeric Citrate Precursor Route

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Synthesis, characterization, multifunctional electrochemical (OGR/ORR/SCs) and photodegradable activities of ZnWO4 nanobricks

Cited by 62 publications

References 55 publications

Efficient Multifunctional Catalytic and Sensing Properties of Synthesized Ruthenium Oxide Nanoparticles

Efficient Multifunctional Catalytic and Sensing Properties of Synthesized Ruthenium Oxide Nanoparticles

Bi2WO6 and FeWO4 Nanocatalysts for the Electrochemical Water Oxidation Process

High-Surface-Area Sodium Tantalate Nanoparticles with Enhanced Photocatalytic and Electrical Properties Prepared through Polymeric Citrate Precursor Route

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Bi₂WO₆ and FeWO₄ Nanocatalysts for the Electrochemical Water Oxidation Process