Development of nano NiO incorporated nickel–phosphorus coatings for electrocatalytic applications

Shibli, S.M.A.; Harikrishnan, G; Anupama, V.R.; Chinchu, K.S.; Meena, Bhagatram

doi:10.1016/j.surfcoat.2014.12.007

Cited by 16 publications

(6 citation statements)

References 39 publications

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“…The coatings incorporated with nano-tetragonal zirconia exhibited a higher potential shift toward nobler region, compared to bare Ni-P coating. The shift in potential toward a noble region revealed the efficient incorporation of the nano-tetragonal zirconia into the Ni-P matrix [44]. It revealed that the Ni-P-nano-tetragonal zirconia coating was generated with a nobler surface than the bare Ni-P coating.…”

Section: Evaluation Of the Progress Of Electroless Depositionmentioning

confidence: 98%

“…Ni-P-nano-tetragonal zirconia coatings were prepared on pretreated mild steel substrates by adopting a reported procedure [44]. The bath contains 100 mL nickel sulfate solution (30 g/L) and 2.5 g succinic acid, and its pH was adjusted to 4.5 by adding ammonia.…”

Section: Evaluation Of Ni-p-nano-tetragonal Zirconia Coatingsmentioning

confidence: 99%

“…The deposition rate of the coatings was measured from the weight difference of the mild steel substrates before and after the deposition process. Micro-hardness of the coatings was analyzed as per ASTM-E-384-99, and thickness was calculated from the method as described elsewhere [44]. Ferroxyl reagent test was conducted for accessing the porosity of the developed coatings.…”

Section: Evaluation Of Ni-p-nano-tetragonal Zirconia Coatingsmentioning

confidence: 99%

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Development of Nano-tetragonal Zirconia-Incorporated Ni–P Coatings for High Corrosion Resistance

Shibli

Chinchu

Sha

2018

Acta Metall. Sin. (Engl. Lett.)

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Pure tetragonal 10-20-nm-size zirconia-based NiP composite coating was developed. The physicochemical and electrochemical characteristics including corrosion resistance of the coating were investigated. The NiP -nano-tetragonal zirconia coating was partially crystalline having face-centered cubic phase. The coating had very high corrosion resistance due to its dense compact morphology and low surface roughness. The NiP -nano-tetragonal zirconia coatings exhibited a cathodic shift of open-circuit potential (OCP) in the range from-0.340 to-0.520 V. A high polarization resistance of the order of 13.2 kX/cm 2 and low corrosion current density of 3.9 lA/cm 2 were achieved due to the effective incorporation of zirconia into the coating.

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Section: Evaluation Of the Progress Of Electroless Depositionmentioning

confidence: 98%

Section: Evaluation Of Ni-p-nano-tetragonal Zirconia Coatingsmentioning

confidence: 99%

Section: Evaluation Of Ni-p-nano-tetragonal Zirconia Coatingsmentioning

confidence: 99%

See 1 more Smart Citation

Development of Nano-tetragonal Zirconia-Incorporated Ni–P Coatings for High Corrosion Resistance

Shibli

Chinchu

Sha

2018

Acta Metall. Sin. (Engl. Lett.)

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“…4(a)) exhibits two absorption bands at 472 and 540 cm -1 . For the NiO phase, a main absorption band assigned to vibrations of the Ni-O bonds has been reported in the range 440-482 cm -1 [26][27] . The α-Fe 2 O 3 phase has a characteristic absorption band in the range 460-480 cm -1 assigned to vibrations of the Fe-O bonds [28][29] .…”

Section: Resultsmentioning

confidence: 99%

Cation Vacancies in NiFe2O4 During Heat Treatments at High Temperatures: Structural, Morphological and Magnetic Characterization

2019

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Nickel ferrite (NiFe 2 O 4) was synthesized by mixing stoichiometric amounts of α-Fe 2 O 3 and NiO using mechanical milling and heat treatments at high temperatures. The physical characterization of the samples was carried out using X-ray diffraction, infrared and Raman spectroscopies, Mössbauer spectrometry, magnetization measurements, scanning electron microscopy and energy dispersive X-ray spectroscopy. We found that NiFe 2 O 4 production increases from 81 to 100 wt. % with increasing temperature. Additionally, the lattice parameter and the saturation magnetization increase with increasing temperature. On the other hand, Mössbauer spectrometry showed that there is a decrease in the subspectral areas ratio for Fe 3+ cations at tetrahedral (A) and octahedral [B] sites, A A /A B , with the increase of the temperature. In the SEM micrographs it was observed that the samples consisted of particles with irregular shapes and micrometric sizes. From IR spectra, the intensity of the 411 cm-1 band (vibrations at octahedral sites) increases relative to the intensity of the 599 cm-1 band (vibrations at tetrahedral sites) with increasing temperature. From the results obtained in the magnetization curves, it was possible to confirm the synthesis of NiFe 2 O 4. As the heat treatment temperature increases, hysteresis loops with S-type geometric forms were obtained. All the results suggest that a defective spinel NiFe 2 O 4 is formed at 1000 °C, and that as the temperature increases, the defects gradually disappear. Neither cation reordering phenomena nor possible evaporation of chemical elements were the dominant effects to account for the results. The results can be explained if it is assumed that [B]-sites cation vacancies are gradually filled with cations as the temperature of the heat treatment increases.

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“…Nickel oxide is a p‐type semiconductor with a stable wide band gap of 3.6 eV owing to its defect structure . Nanosized NiO can be readily modified and used as a heterogeneous catalyst for a variety of chemical and petrochemical catalytic processes, gas sensors, electrochromic films, and multilayer capacitors. However, a precise control of particle size distribution of the synthesized NiO powders is crucial to achieve its exceptional properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of NiO Nano‐Spheres by Templating on Chitosan as a Green Precursor

et al. 2016

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In this study, nickel oxide was prepared through the calcination of extrusion dripped chitosan/nickel nitrate beads. The morphology and structural properties of the products were studied using various characterization techniques. Uniformly distributed nickel oxide was formed as observed from the studies of surface morphology where the processing parameters play a huge role on the resulting morphology. TEM results have shown that nickel oxide with crystallite sizes of 10–30 nm was obtained. The Fourier-transform infrared spectra studies show an intense peak at 525 cm−1, which is attributed to the vibration of Ni–O bond. Furthermore, the XRD results show NiO diffraction peaks correspond to (111), (200), (220), (311), and (222) which indicates that a bunsenite structure with a face-centered cubic phase was produced in this study. The usage of 500°C as the lower limit in this study is justified due to the complete removal of the templating material as seen in the thermalgravimetric analysis studies. Furthermore, it was obtained that the largest surface area of nickel oxide synthesized using this technique is 48.024 m2/g with pore sizes of 19.843 nm. The usage of chitosan as a green template for the synthesis of nanoparticles has shown promising results which allows a more economical and sustainable approach for the fabrication of nanomaterials

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Development of nano NiO incorporated nickel–phosphorus coatings for electrocatalytic applications

Cited by 16 publications

References 39 publications

Development of Nano-tetragonal Zirconia-Incorporated Ni–P Coatings for High Corrosion Resistance

Development of Nano-tetragonal Zirconia-Incorporated Ni–P Coatings for High Corrosion Resistance

Cation Vacancies in NiFe2O4 During Heat Treatments at High Temperatures: Structural, Morphological and Magnetic Characterization

Synthesis and Characterization of NiO Nano‐Spheres by Templating on Chitosan as a Green Precursor

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