Microstructure and thermal conductivity of surfactant-free NiO nanostructures

Sahoo, Pranati; Misra, Debasmita; Salvador, Jim; Makongo, Julien P. A.; Chaubey, Girija S.; Takas, Nathan J.; Wiley, John B.; Poudeu, Pierre F. P.

doi:10.1016/j.jssc.2012.01.052

Cited by 33 publications

(22 citation statements)

References 35 publications

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“…The spectrum of the XPS survey (Figure 5a) confirms the existence of Ni, Ru and O as main components of the composite, which is consistent with element mapping results in Figure 1c and 2c. As shown in Figure 5b, the deconvoluted Ni 2p 3/2 peaks at 853.90 and 855.65 eV and Ni 2p 1/2 peaks at 871.49 and 873.48 eV indicate the partial oxidation of NiO in this composite [45] . Because of the overlapping of C 1s and Ru 3d signals at around 285 eV, the high resolution Ru 3p spectrum was shown in Figure 5c.…”

Section: Resultsmentioning

confidence: 91%

Nickel Foam Supported NiO@Ru Heterostructure Towards High‐Efficiency Overall Water Splitting

Zhang

et al. 2021

ChemPhysChem

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Electrocatalytic water splitting for hydrogen production from renewable energy requires the innovation of electrocatalysts with high activity and low cost. In this work, densely packed NiO@Ru nanosheets were fabricated on the surface of Ni foam through a two‐step method of Ni(OH)2 growth followed by Ru deposition. Through pair distribution function analysis from selected‐area electron diffraction and X‐ray photoelectron spectroscopy, the interface structure feature is revealed as a thin layer of perovskite NiRuO3 sandwiched between NiO and Ru. The electrode exhibits high activity and durability for HER and OER, delivering a current density of 10 mA cm−2 at a voltage of 1.55 V for overall water splitting in 1 M KOH. The excellent performance can be attributed to the intimate interface contact of NiO and Ru in addition to low charge transfer resistance and super‐hydrophilic surface structure, as verified by the electrochemical impedance spectroscopy and contact‐angle measurement.

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Section: Resultsmentioning

confidence: 91%

Nickel Foam Supported NiO@Ru Heterostructure Towards High‐Efficiency Overall Water Splitting

Zhang

et al. 2021

ChemPhysChem

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“…These results suggest that the surface of the as prepared anodized Ni electrode mainly consists of nickel fluoride, which is electrochemically oxidized to NiO at around 0.5 V vs. Hg/ HgO in aqueous 10 M KOH. The density of NiF 2 (4.8 g cm À3 ) is lower than that of NiO (6.8 g cm À3 ) [11,12]. Thus, during the first CV cycle, the conversion of NiF 2 to higher density NiO caused the formation of the cracks on the NiO electrode surface.…”

Section: Resultsmentioning

confidence: 97%

NiO layers grown on a Ni substrate by galvanostatic anodization as a positive electrode material for aqueous hybrid capacitors

Chiku

Toda

Higuchi

et al. 2015

Journal of Power Sources

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“…The deconvolution of the Ni2p spectra recorded for NPs placed on the TiO 2 NTs ( Figure 4 c), however, shows more complex surface chemistry, revealing an additional peak doublet. The Ni2p 3/2 peak located at 853.7 eV belongs to NiO, with the Ni2p 3/2 NiO satellite merging with Ni(OH) 2 at approximately 861 eV [ 58 , 60 ]. Based on the proposed deconvolution, the share of the dehydrated NiO in the TiO 2 NTs decorated with NiNPs is around 20%.…”

Section: Resultsmentioning

confidence: 99%

“…The composition of the NiNPs formed by laser ablation is straightforward, and the Ni2p spectra are presented in Figure 4. A single peak doublet was used for the deconvolution model, with Ni2p3/2 peaking at 855.7 eV, which is characteristic for Ni(OH)2 forming a shell over the metallic core [57,58]. The Ni(OH)2 is characterized by significantly split spin-orbit components (by 17.7 eV) and strong satellite features, where Ni2p3/2 of Ni(OH)2 satellite peaks are located at 861 eV, as indicated in Figure 4a [59].…”

Section: Colloid Characterisationmentioning

confidence: 99%

Laser-Assisted Synthesis and Oxygen Generation of Nickel Nanoparticles

et al. 2020

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Nowadays, more than ever, environmental awareness is being taken into account when it comes to the design of novel materials. Herein, the pathway to the creation of a colloid of spherical, almost purely metallic nickel nanoparticles (NPs) through pulsed laser ablation in ethanol is presented. A complex description of the colloid is provided through UV-vis spectroscopy and dynamic light scattering analysis, ensuring insight into laser-induced nanoparticle homogenization and size-control of the NPs. The transmission electron spectroscopy revealed spherical nanoparticles with a narrow size distribution, whereas the energy-dispersive X-ray spectroscopy accompanied by the X-ray photoelectron spectroscopy revealed their metallic nature. Furthermore, an example of the application of the colloidal nanoparticles is presented, where a quick, five-min ultrasound modification results in over an order of magnitude higher current densities in the titania-based electrode for the oxygen evolution reaction.

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Microstructure and thermal conductivity of surfactant-free NiO nanostructures

Cited by 33 publications

References 35 publications

Nickel Foam Supported NiO@Ru Heterostructure Towards High‐Efficiency Overall Water Splitting

Nickel Foam Supported NiO@Ru Heterostructure Towards High‐Efficiency Overall Water Splitting

NiO layers grown on a Ni substrate by galvanostatic anodization as a positive electrode material for aqueous hybrid capacitors

Laser-Assisted Synthesis and Oxygen Generation of Nickel Nanoparticles

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