Nickel oxide thin film from electrodeposited nickel sulfide thin film: peroxide sensing and photo-decomposition of phenol

Jana, Sumanta; Samai, Subhasis; Mitra, Bibhas Chandra; Bera, Pulakesh; Mondal, Anup

doi:10.1039/c4dt01658k

Cited by 41 publications

(19 citation statements)

References 47 publications

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“…It is obvious from the results that the absorption decreases with increasing crystallite size, while the optical band gap energy is higher for lower grain size particles. The calculated optical band gap energy shows a significant blue shift over that of bulk NiS (∼ 2.1 eV) [61] which is in close agreement with those published recently for nanosized NiS [14, 62]. …”

Section: Resultssupporting

confidence: 91%

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Synthesis of nickel and cobalt sulfide nanoparticles using a low cost sonochemical method

Kristl

Dojer

Gyergyek

et al. 2017

Heliyon

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Nickel and cobalt sulfides are promising materials in different cutting-edge research areas like solar cells, supercapacitors, catalysts, and electrode materials. Nickel and cobalt sulfides with various stoichiometries have been synthesized sonochemically from Ni(CH3COO)2 ∙ 4H2O, Co(CH3COO)2 ∙ 2H2O and different sulfur precursors using a direct immersion ultrasonic probe. The products were characterized by X-ray powder diffraction, transmission electron microscopy (TEM) including EDX analysis, IR and UV–Vis spectroscopy and elemental analysis. Following products have been obtained: NiS, Ni3S4, CoS1.097 and Co9S8, with average crystallite sizes in the range 7−30 nm. Effects of different reaction conditions on the size, morphology and optical band-gap energy were evaluated. Optical band-gap energies in the range 3.3 eV−3.8 eV were observed for the obtained nanoparticles.

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Section: Resultssupporting

confidence: 91%

“…By extrapolating the linear portion of the curve to the x -axis, one can obtain E g as the intercept [14, 61]. The corresponding E g values for NiS samples obtained by 50%, 70% and 90% amplitude were 3.8 eV, 3.5 eV and 3.3 eV.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of nickel and cobalt sulfide nanoparticles using a low cost sonochemical method

Kristl

Dojer

Gyergyek

et al. 2017

Heliyon

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“…We electrodeposited NiS on an Au RDE substrate using a method adapted from previous reports. (Jana et al, 2014) , (Sun et al, 2013) The as-prepared NiS film was amorphous as judged by the absence of peaks in grazing incidence defractograms ( Figure S10a). Following thermal annealing at 250 ˚C under N2 for three hours, the crystallinity of the film is improved and grazing incident XRD (GIXD) and XPS evince the formation of crystalline NiS surface phases (Figure S10b, c and d).…”

Section: Resultsmentioning

confidence: 99%

Surface Restructuring of Nickel Sulfide Generates Optimally Coordinated Active Sites for Oxygen Reduction Catalysis

Yan

Krishnamurthy

Hendon

et al. 2017

Joule

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First-row transition metal oxides and chalcogenides have been found to rival or exceed the performance of precious metal-based catalysts for the interconversion of water and O2, central reactions that underlie renewable electricity storage and utilization. However, the high lability of the first-row transition metal ions leads to surface dynamics under the conditions of catalysis and results in active site structures distinct from those expected by surface termination of the bulk lattice. While these surface transformations have been well-characterized on many metal oxides, the surface dynamics of heavier chalcogenides under electrocatalytic conditions are largely unknown. We recently reported that the heazlewoodite Ni3S2 bulk phase supports efficient ORR catalysis under benign aqueous conditions and exhibits excellent tolerance to electrolyte anions such as phosphate which poison Pt. Herein, we combine electrochemistry, surface spectroscopy and high resolution microscopy to characterize the surface dynamics of Ni3S2 under ORR catalytic conditions. We show that Ni3S2 undergoes self-limiting oxidative surface restructuring to form an approximately 2 nm amorphous surface film conformally coating the Ni3S2 crystallites. The surface film has a nominal NiS stoichiometry and is highly active for ORR catalysis. Using DFT simulations we show that, to a first approximation, the catalytic activity of nickel sulfides is determined by the Ni-S coordination numbers at surface exposed sites through a simple geometric descriptor. In particular, we find that the surface sites formed dynamically on the surface of amorphous NiS during surface restructuring provide an optimal energetic landscape for ORR catalysis. This work provides a systematic framework for characterizing the rich surface chemistry of metal-chalcogenides and provides principles for the development of structure-energy-activity descriptors leading to a broader understanding of electrocatalysis mediated by amorphous materials.The interconversion of water and oxygen is a central chemistry underlying the storage of renewable electricity in energy-dense chemical bonds (Lewis and Nocera, 2006). The oxidation of H2O to O2 is the efficiency limiting half reaction for the splitting of water to generate H2 fuel, whereas the reduction of O2 to H2O is the efficiency limiting cathode reaction in low temperature fuel cells (Katsounaros et al., 2014). Platinum group metals and their corresponding oxides and chalcogenides are well-known catalysts for these reactions(Matsumoto and Sato, 1986) - (Gasteiger et al., 2005), but recent studies have uncovered a diversity of earth abundant first-row transition metal oxides(Kanan and Nocera, 2008) - (Long et al., 2014) and chalcogenides (Gao et al., 2012) , (Gao et al., 2013) that, depending on the reaction conditions, rival the activity of their precious metal analogs.Unlike their precious metal congeners, first-row transition metal ions are labile, Merbach, 1999, 2005) and as a result, the surfaces of these materials are expected to ...

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“…Design and fabrication of miniaturized gas sensing devices based on micro-, meso-, and nanostructure-sensing materials, with stable and controlled size and shape, has become a very advanced research topic because these novel portable devices are being widely applied in different fields of science and technology, such as homeland security, biological detection, and monitoring of manufacturing environments [1][2][3][4][5]. The central factors affecting the sensing performances of gas sensors depend not only on the structure, dimension, size, and morphology of sensing materials but also on their composition [6,7].…”

Section: Introductionmentioning

confidence: 99%

Preparation of NiO two-dimensional grainy films and their high-performance gas sensors for ammonia detection

Wang¹,

Yang²,

Wei³

et al. 2016

Nano Online

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Semiconductor NiO two-dimensional grainy films on glass substrates are shown to be an ammonia-sensing devices with excellent comprehensive performance, such as the good stability, short response time, outstanding recovery performance, excellent sensitivity, and selectivity. The morphology and structure analysis of gas sensing materials indicated that the as-fabricated NiO films was uniform and highly ordered porous structure on substrates, which composed of small size particles with diameters ranging from 8 to 30 nm. The shells of these particles were ultrathin amorphous NiO plates, and the core of each particle was face-centered cubic single crystal structure. In the gas sensing performance tests, we found that the excellent electron transport and interconnection properties of sensing films improved the stability and recovery performance of sensors, and porous surface structure increased the specific surface area of sensing films leading to fast response and excellent sensitivity for sensors. Meanwhile, this sensors owned outstanding selectivity toward ammonia which could be because NiO-sensing films had higher binding affinity for the electron-donating ammonia.

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Nickel oxide thin film from electrodeposited nickel sulfide thin film: peroxide sensing and photo-decomposition of phenol

Cited by 41 publications

References 47 publications

Synthesis of nickel and cobalt sulfide nanoparticles using a low cost sonochemical method

Synthesis of nickel and cobalt sulfide nanoparticles using a low cost sonochemical method

Surface Restructuring of Nickel Sulfide Generates Optimally Coordinated Active Sites for Oxygen Reduction Catalysis

Preparation of NiO two-dimensional grainy films and their high-performance gas sensors for ammonia detection

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