Sputter deposited nanocrystalline Ni and Ni-W films as catalysts for hydrogen evolution

Metikoš‐Huković, Mirjana; Grubač, Zoran; Radić, Nikola; Tonejc, Antun

doi:10.1016/j.molcata.2006.01.020

Cited by 99 publications

(44 citation statements)

References 42 publications

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“…[7,9,13] Figure 4 presents a comparison between the experimental and calculated Tafel plots after correction for the uncompensated IR drop has been made (the electrolyte resistance of 1.35 Ω was determined from EIS data). The symbols stand for experimental data, while the lines represent the calculated data according to [Eq.…”

Section: Electrocatalytic Activity For Hydrogen Evolutionmentioning

confidence: 99%

“…The exchange current densities, j0, which represents the magnitude of the rate of H2 evolution, were derived from the intercepts of these lines at zero overpotential according to [Eq. (13)]:…”

Section: Electrocatalytic Activity For Hydrogen Evolutionmentioning

confidence: 99%

“…These steps are: [11,12,13] In the present work the kinetic parameters for the hydrogen evolution on the Ni-Co alloy were assessed by pseudo-steady-state polarization curves and electrochemical impedance spectroscopy in 1.0 mol L -1 NaOH solution, at 20 °C. The results were compared with results for catalytic activity of pure polycrystalline Ni and Co obtained under the same experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

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Electrocatalytic Activity of the Ni57.3Co42.7 Alloy for the Hydrogen Evolution

Grubač¹,

Sesar²

2017

Croat. Chem. Acta

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Abstract:The hydrogen evolution reaction (HER) on Ni57.3Co42.7 alloy and its main components, polycrystalline nickel and cobalt was investigated in 1.0 mol L -1 NaOH solution at 20 °C using cyclic voltammetry, pseudo-steady-state linear polarization and electrochemical impedance spectroscopy methods. The purpose of investigation was to evaluate the effect of cobalt on the intrinsic catalytic activity of nickel. Cyclic voltammetry measurements, performed in a wide potential range from hydrogen to oxygen evolution, clearly showed the potential range of formation and reduction metal oxides / hydroxides. Electrocatalytic activity of the investigated electrodes was derived from pseudo-steadystate linear polarization curves, Tafel plots and electrochemical impedance spectroscopy (EIS). Electrochemical impedance spectra obtained in potential range of hydrogen evolution were modeled with modified Randles electric equivalent circuit. Kinetic parameters (the exchange current density and the cathodic Tafel slope), determined from linear polarization measurements and electrochemical impedance measurements, were compared for all three electrode materials. Ni57.3Co42.7 catalyst has shown better electrocatalytic activity compared with pure Co. The main pathway for the HER at investigated electrode materials is Volmer-Heyrovski with Heyrovsky as the rate determining step.

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Section: Electrocatalytic Activity For Hydrogen Evolutionmentioning

confidence: 99%

Section: Electrocatalytic Activity For Hydrogen Evolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrocatalytic Activity of the Ni57.3Co42.7 Alloy for the Hydrogen Evolution

Grubač¹,

Sesar²

2017

Croat. Chem. Acta

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“…It is widely accepted that the HER on a metallic electrode in alkaline solutions, proceeding through the following three reaction mechanism [3][4][5] : …”

Section: Introductionmentioning

confidence: 99%

Electrochemical Properties of FeNiMm Electrodes for Hydrogen Evolution in Alkaline Solutions by VIM Technique

Wang

Zang

2011

AMR

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Abstract:The FeNiMm (Mm = rare earth metals) electrodes have been successfully prepared by vacuum induction melting (VIM) technique and used to be active cathodes in chlor-alkali industry for the first time. The alloys are found that Mm content and Fe content has significant impact on the polarization characteristics of the FeNiMm electrodes. With the increasing of Mm content, the η 200 change a little but the apparent exchange hard, and increasing the content of Fe and decreasing the content of Mm will have a negative effect on the electrocatalytic performance. Fe 84.50 Ni 7.72 Mm 7.72 was found to yield the highest intrinsic electrocatalytic activity. On the power interruption term, the cathodes exhibit excellent resistivity against repeated power interruptions.

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“…Nanocrystalline nickel (nc-Ni) is a very interesting material due to its enhanced mechanical (Siow et al, 2004;Yang & Vehoff, 2004), corrosion Wang et al, 1996) and catalytic (Metikos-Hukovic et al, 2006) properties. Several preparation techniques have been employed so far in order to obtain a bulk material [severe plastic deformation (Zhilyaev et al, 2002, and references therein), ball milling (Bonetti et al, 1999;Valiev et al, 1997) or inert gas condensation followed by compaction of nanocrystalline powders (Birringer et al, 1984)], thick films [direct or pulsed electrodeposition (Shriram et al, 2000;Palumbo et al, 1997;El-Sherik & Erb, 1995)] or thin films [physical vapour deposition methods, PVD (Knapp & Follstaedt, 2004;Zhong et al, 2004;Brunetti & Monticone, 1993;Hugo et al, 2003;Mitra et al, 2001Mitra et al, , 2004Gai et al, 2002;Hurley et al, 2005)].…”

Section: Introductionmentioning

confidence: 99%

Structural study of nanocrystalline nickel thin films

et al. 2007

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Nickel thin films (400 nm) were deposited by magnetron sputtering onto fused silica substrates. The effects of argon pressure and substrate temperature (from room temperature to 973 K) upon the film structure were investigated. The film structure was studied using grazing‐incidence small‐angle X‐ray scattering (GISAXS) and X‐ray diffraction (XRD) analysis. It was found that the prepared nanocrystalline Ni films contain two kinds of inhomogeneities observable by GISAXS, namely isotropic and platelet‐like. Up to about 373 K the isotropic or spherical `particles' prevail, while above that temperature the platelet‐like `particles' predominate. These inhomogeneities are ascribed to intergranular matter or grain boundaries, since the grain size (as determined from the XRD patterns) was found to increase from 7 nm in samples deposited at room temperature to about 90 nm in samples deposited at 423 K or higher temperature.

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Sputter deposited nanocrystalline Ni and Ni-W films as catalysts for hydrogen evolution

Cited by 99 publications

References 42 publications

Electrocatalytic Activity of the Ni57.3Co42.7 Alloy for the Hydrogen Evolution

Electrocatalytic Activity of the Ni57.3Co42.7 Alloy for the Hydrogen Evolution

Electrochemical Properties of FeNiMm Electrodes for Hydrogen Evolution in Alkaline Solutions by VIM Technique

Structural study of nanocrystalline nickel thin films

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