Morphology control of 1D noble metal nano/heterostructures towards multi-functionality

Dar, Farrukh Iqbal; Habouti, S.; Minch, Robert; Dietze, Matthias; Es‐Souni, M.

doi:10.1039/c2jm16826j

Cited by 17 publications

(16 citation statements)

References 48 publications

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“…The non-annealed sample 1 (Figure 2a, b) shows solely Ni NTs that form via nucleation and growth at the pore walls because of the presence of an extremely thin Au layer (see the experimental section and our previous paper [32]). The judicious deposition time for Ni to obtain NT is 50 s.…”

Section: Resultsmentioning

confidence: 81%

“…X-ray diffraction (X'Pert Pro system, PANalytical, Almelo, The Netherlands) data was obtained in grazing incident geometry with fixed angles of 1.5° and 0.05° step using monochromatic Cu Kα radiation (( λ = 1.5418 Å )). The process steps for preparing the nanostructures were detailed in our previous paper [32] and are described briefly below.…”

Section: Methodsmentioning

confidence: 99%

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Morphology and property control of NiO nanostructures for supercapacitor applications

2013

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We process one-dimensional (1D) NiO nanostructures in anodized alumina templates starting from electrochemically deposited Ni nanotubes (NTs), and characterize their morphology-dependent supercapacitance behavior. The morphology of the 1D NiO nanostructures is controlled by the time of annealing at 450°C. After 25 min of annealing, the NTs start to close but maintain the tubular structure, and after a further 300 min of annealing time, the tubes are completely closed and nanorods (NRs) are formed. We show that the structures obtained are highly promising for supercapacitor applications; the performance of the NiO NT structure is with a specific capacitance of 2,093 F/g, the highest ever obtained for NiO, approaching the theoretical capacitance of this material. A suitable combination of nanocrystalline grain size and the high surface area akin to the tubular structure is responsible for this high performance. In contrast, the NiO NR structure is characterized by lower performance (797 F/g). A further attribute of the proposed structure is its high stability against galvanostatic charging-discharging cycling at high current densities, with almost no alteration to performance after 500 cycles.

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Section: Resultsmentioning

confidence: 81%

Section: Methodsmentioning

confidence: 99%

Morphology and property control of NiO nanostructures for supercapacitor applications

2013

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“…So far, various approaches have been developed for the fabrication of 1D tellurium nanostructures, including microwave‐assisted synthesis [15], solvothermal or hydrothermal methods [14,16,17], thermal evaporation [27,28], chemical vapor deposition [29], photolysis methods [30] and electrodeposition [18,19,24]. Among these methods, electrochemical deposition is a promising and facile method due to its simplicity, low cost, ease of scale‐up, high selectivity and environmental compatibility [31–38]. More importantly, it allows the growth of various semiconducting crystals directly on a conducting substrate with good electrical contact, which can facilitate the diffusion of active species and transport of electrons, and hence may further broaden their applications in devices.…”

Section: Introductionmentioning

confidence: 99%

Facile electrochemical synthesis of tellurium nanorods and their photoconductive properties

Zhang

Liang

et al. 2012

Cryst. Res. Technol.

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Tellurium nanorods have been successfully fabricated by template and surfactant-free electrochemical technique from an aqueous solution at room temperature. The as-prepared tellurium nanorods were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectrometry, UV-vis spectroscopy and photoluminescence spectroscopy. Films based on tellurium nanorods were constructed to study the photoresponse and I-V curves. These photoresponse measurements demonstrate that tellurium nanorods exhibited enhanced conductivity under illumination compared to in the dark measurement.

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“…Using a different deposition time in the AAO, Dar et al performed a systematic investigation on the morphology control of 1D noble metal (Pt, Pd) arrays from thin wall nanotubes to nanorods [44]. Pt nanotubes were obtained in a deposition time of 100 s at a constant voltage of -0.1 V (vs. Ag/AgCl), but with the longer deposition time, Pt nanorods were formed.…”

Section: Electrodepositionmentioning

confidence: 99%

An Overview of One-Dimensional Metal Nanostructures for Electrocatalysis

Kim

Noh

et al. 2015

Catal Surv Asia

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Nanostructures of metals are of great importance in the area of catalysis due to their distinct physicochemical properties compared to their bulk counterparts. Size and morphology dependent properties of metal nanostructures provide a rational approach toward designing a highly efficient catalytic materials. In particular, onedimensional (1D) metallic nanostructures in the shapes of wires, rods and tubes have recently been studied with great interest due to their potential uses as electrocatalysts for oxidations of fuels and reduction of oxidants in fuel cell applications. Compared to the conventional nanoparticle catalysts that are generally supported on carbon, these 1D materials can offer significant opportunities to improve catalytic performance under fuel cell reaction conditions by their structural characteristics such as preferential exposure of reactive crystal facets, high stability, and facile electron transport. Great advances in the synthesis of electrocatalysts based on the metallic nanowires and nanotubes have been made with enhanced electrocatalytic activity and durability. This review summarizes the research progress made on synthesizing 1D metal electrocatalysts using different synthetic strategies, including template-assisted method, electrospinning, and template-free wet-chemical synthesis, with an emphasis on the electrocatalytic performance of these 1D nanomaterials.

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Morphology control of 1D noble metal nano/heterostructures towards multi-functionality

Cited by 17 publications

References 48 publications

Morphology and property control of NiO nanostructures for supercapacitor applications

Morphology and property control of NiO nanostructures for supercapacitor applications

Facile electrochemical synthesis of tellurium nanorods and their photoconductive properties

An Overview of One-Dimensional Metal Nanostructures for Electrocatalysis

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