Electrochemical performance of Ni–RE (RE = rare earth) as electrode material for hydrogen evolution reaction in alkaline medium

Domínguez‐Crespo, M.A.; Torres‐Huerta, A.M.; Brachetti-Sibaja, S.B.; Flores‐Vela, A.

doi:10.1016/j.ijhydene.2010.09.064

Cited by 132 publications

(75 citation statements)

References 73 publications

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“…Furthermore, it is obvious that the RuO2 coating also contains Ni in some form as the oxidation peak for Ni 2+ /Ni 3+ at about + 0.30 V vs. SCE is observed in the cyclic voltammetry of all three samples and, in addition, the Ni 0 /Ni 2+ peak at -0.85 V in the first scan of the HER (2 h) sample [6,26,27]. Nickel content in RuO2 coatings applied on Ni substrates has been confirmed with XPS [18].…”

Section: Effect Of Her Oer and Reverse Currentsmentioning

confidence: 91%

Corrosion of ruthenium dioxide based cathodes in alkaline medium caused by reverse currents

Holmin

Näslund

Ingason

et al. 2014

Electrochimica Acta

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A reverse current obtained during power shutdowns in industrial processes, such as chlor-alkali production or alkaline water electrolysis, is deleterious for hydrogen evolving ruthenium dioxide (Ru02) based cathodes. It has been observed that RuO2 coatings after a power shutdown, necessary for e.g. maintenance, are severely damaged unless polarization rectifiers are employed. In this work we show why these types of cathodes are sensitive to reverse currents, i.e. anodic currents, after hydrogen evolution. RuO2 coatings deposited on nickel substrates were subjected to different electrochemical treatments such as hydrogen evolution, oxygen evolution, or reverse currents in 8 M NaOH at 90 degrees C. Polarity inversion was introduced after hydrogen evolution to simulate the effect of reverse currents. Because of chemical interaction with hydrogen, a significant amount of the RuO2 coating was transformed into hydroxylated species during cathodic polarization. Our study shows that these hydroxylated phases are highly sensitive to electrochemical corrosion during anodic polarization after extended hydrogen evolution.

Funding Agencies|Swedish Research Council [2007-5059]; European Research Council under the European Communities/ERC [258509]; Swedish Research Council (VR) [642-2013-8020]; KAW Fellowship program

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Section: Effect Of Her Oer and Reverse Currentsmentioning

confidence: 91%

Corrosion of ruthenium dioxide based cathodes in alkaline medium caused by reverse currents

Holmin

Näslund

Ingason

et al. 2014

Electrochimica Acta

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Funding Agencies|Swedish Research Council [2007-5059]; European Research Council under the European Communities/ERC [258509]; Swedish Research Council (VR) [642-2013-8020]; KAW Fellowship program

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“…As kinetics of ethanol oxidation process were found to become significantly facilitated in alkaline environments [4][5][6][7][8], the range of suitable EOR catalyst materials was extended to cover non-noble but highly corrosion-resistant metals, such as nickel, which also possesses reasonable electrical and thermal conductivities and good mechanical durability [9,10]. Nickel foams have commercially been available for more than two decades.…”

Section: Introductionmentioning

confidence: 99%

On the Temperature Performance of Ethanol Oxidation Reaction at Palladium-Activated Nickel Foam

2014

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The present paper reports on ethanol oxidation reaction (EOR) investigated at catalytically modified nickel foam material. The EOR was studied in 0.1 M NaOH supporting electrolyte on Pd-activated nickel foam catalyst material, obtained by a spontaneous deposition method. Catalytic modification of Ni foam resulted in a composite material having superior EOR kinetics, as elucidated through corresponding values of a.c. impedance-derived charge-transfer resistance parameter (including temperature-dependence of the EOR over the temperature range 20-60°C). The presence of a catalytic additive was disclosed from SEM and XRD analyses.

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“…Other important options for the fabrication of highly-porous, three-dimensional Ni or Ni-originated matrices include powder-based [37,38] and electrochemical deposition processes [10,39]. As all options are significant, nickel foam comparatively provides a fully commercialized technology with highly reproducible material having superior mechanical and electrical properties.…”

Section: Methodsmentioning

confidence: 99%

On the Temperature Dependence of Hydrogen Evolution Reaction at Nickel Foam and Pd-Modified Nickel Foam Catalysts

Pierożyński

Mikołajczyk

2014

Electrocatalysis

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This communication reports on hydrogen evolution reaction (HER), studied at Ni foam and Pd-activated nickel foam materials in 0.1-M NaOH solution over the temperature range of 20-60°C. Catalytic modification of Ni foam leads to significant facilitation of temperature-dependent HER kinetics, manifested through radically reduced values of chargetransfer resistance parameter, as well as substantially modified Tafel polarization curves. The presence of a catalytic additive (Pd) is evidenced through scanning electron microscopy (SEM) analysis.

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Electrochemical performance of Ni–RE (RE = rare earth) as electrode material for hydrogen evolution reaction in alkaline medium

Cited by 132 publications

References 73 publications

Corrosion of ruthenium dioxide based cathodes in alkaline medium caused by reverse currents

Corrosion of ruthenium dioxide based cathodes in alkaline medium caused by reverse currents

On the Temperature Performance of Ethanol Oxidation Reaction at Palladium-Activated Nickel Foam

On the Temperature Dependence of Hydrogen Evolution Reaction at Nickel Foam and Pd-Modified Nickel Foam Catalysts

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