The investigation of the kinetics and mechanism of hydrogen evolution reaction on tin

Azizi, Omid; Jafarian, M.; Gobal, F.; Heli, H.; Mahjani, M.G.

doi:10.1016/j.ijhydene.2006.08.043

Cited by 110 publications

(56 citation statements)

References 30 publications

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“…It was demonstrated that the exchange current density, i 0 , of the Ni-Co-La 2 O 3 composite coating electrode was 31 times larger than that of Ni-Co alloy deposited coating electrode, showing that Ni-CoLa 2 O 3 composite coating electrode possessed larger electrocatalytic activity than Ni-Co alloy deposited coating electrode. In addition, the Tafel slope of Ni-Co alloy deposited coating electrode was -110.5 mV dec −1 approaching to the theoretical value of -118 mV dec −1 , showing that the hydrogen evolution reaction on Ni-Co alloy deposited coating electrode was proceeded via a Volmer-Heyrovsky mechanism [28] . While the Tafel slope ECS Transactions, 28 (26) 3-12 (2010) of Ni-Co-La 2 O 3 composite coating electrode was -166.9 mV dec −1 , indicating that a different mechanism controlled by Volmer-Tafel reaction happened on this electrode [29] .…”

Section: Ecs Transactions 28 (26) 3-12 (2010)mentioning

confidence: 59%

“…It was well established that HER in acidic solutions can proceed through the following mechanisms [28] : [3] Where k represents the rate constants of the forward and reverse processes, M the electrode material and MH ad the hydrogen adsorbed on the electrode surface. HER began with the proton discharge reaction (Volmer reaction, Eq.…”

Section: Ecs Transactions 28 (26) 3-12 (2010)mentioning

confidence: 99%

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La₂O₃-Modified Nickel-Cobalt Composite Coating as Cathode Materials for Hydrogen Evolution Reaction

Liang

Chen

et al. 2010

ECS Trans.

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La 2 O 3 was successfully doped into nickel-cobalt alloy coating on Ti substrate by electrodeposition technology.The surface morphology and microstructure were examined by SEM and XRD, respectively, and the hydrogen evolution property was evaluated by electrochemical techniques, including steady-state polarization, Tafel plot and electrochemical impedance spectroscopy. It was found that the incorporated La 2 O 3 particles resulted in the improvement of roughness and surface area of the composite coating electrode, and hydrogen evolution potential of nickelcobalt-La 2 O 3 composite coating electrode moved positively around 178 mV at 15 mA cm -2 compared with that of nickel-cobalt alloy deposited coating electrode. It was assumed that the enhanced electrocatalytic activity to hydrogen evolution was attributed to the improved surface area and the decreased apparent activation energy, which was verified by hydrogen evolution kinetics parameters calculated from Tafel plots and electrochemical impedance spectroscopy.

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Section: Ecs Transactions 28 (26) 3-12 (2010)mentioning

confidence: 59%

Section: Ecs Transactions 28 (26) 3-12 (2010)mentioning

confidence: 99%

La₂O₃-Modified Nickel-Cobalt Composite Coating as Cathode Materials for Hydrogen Evolution Reaction

Liang

Chen

et al. 2010

ECS Trans.

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“…This is due to the fact that the adsorption process is facilitated and the chargetransfer process dominates the impedance response as the potential increases. Hence, having into account the values of α and the Tafel slopes determined from the polarization curves, and the information extracted from the EIS experiments, it can be concluded that the HER is controlled by the Volmer-Heyrovsky mechanism [46,49].…”

Section: Polarization Measurementsmentioning

confidence: 99%

Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis

González-Buch

Herrãiz‐Cardona

Ortega

et al. 2016

International Journal of Hydrogen Energy

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Au nanoparticles (Au-NPs) were successfully synthesized and incorporated into the surface of a macroporous Ni electrode fabricated via galvanostatic electrodeposition at high current densities in order to produce hydrogen by means of alkaline water electrolysis. The developed electrodes were morphologically characterized by means of confocal laser scanning and field emission scanning electron microscopes. The electrocatalytic behaviour towards the hydrogen evolution reaction was studied by Tafel polarization curves and electrochemical impedance spectroscopy. It was clear that enlarging the real surface area of an electrode its catalytic activity was greatly enhanced. This improvement was further increased when Au-NPs were added to the macroporous Ni surface. In this case, the improvement was not only caused by enlarging the surface area but also by an improvement in the intrinsic catalytic activity of the alloy, as it was shown by the exchange current densities values, calculated from the real surface area.

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“…By contrast, other elements improve corrosion resistance by diminishing the cathodic reaction. According to Zeng et al 16) and Azizi et al 17) , elements with a high hydrogen overpotential, such as Al, Zn, Cd, and Sn, tend to make cathodic hydrogen evolution more dif cult. Nam et al 13) reported that the corrosion current density of a sample containing 1 mass% Sn is approximately one-third that of an Mg-5Al-based alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure Factors on Stress Corrosion Behavior of Mg<i>-x</i>Sn Alloys (<i>x</i> = 2, 5, 8 mass%)

2016

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The effect of microstructure on the stress corrosion behavior of Mg-Sn alloys was investigated using a bent-beam method. The effects of an Mg 2 Sn phase and Sn in the matrix on stress corrosion were investigated. Mg 2 Sn phase mainly formed at the grain boundary. The volume fraction of the Mg 2 Sn phase increased with increasing Sn content, and the morphology of Mg 2 Sn changed from spherical to a semi-continuous network. The average volume fractions of Mg 2 Sn phase increased from 0.07 ± 0.02% to 5.06 ± 0.92% as the Sn content was increased from 2 to 8 mass%. An increase in the amount of Mg 2 Sn phase increased the pit density, whereas dissolution of the Mg 2 Sn phase into the matrix resulted in decreased pit density. An intergranular cracking mode was observed. The solution heat treatment dissolved the Mg 2 Sn phase and eliminated the micro-galvanic corrosion due to Mg 2 Sn, thereby delaying crack initiation also enhancing stress corrosion resistance. Mg-8%Sn sample through solution heat treatment showed the best stress corrosion resistance.

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The investigation of the kinetics and mechanism of hydrogen evolution reaction on tin

Cited by 110 publications

References 30 publications

La₂O₃-Modified Nickel-Cobalt Composite Coating as Cathode Materials for Hydrogen Evolution Reaction

La₂O₃-Modified Nickel-Cobalt Composite Coating as Cathode Materials for Hydrogen Evolution Reaction

Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis

Effect of Microstructure Factors on Stress Corrosion Behavior of Mg<i>-x</i>Sn Alloys (<i>x</i> = 2, 5, 8 mass%)

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The investigation of the kinetics and mechanism of hydrogen evolution reaction on tin

Cited by 110 publications

References 30 publications

La2O3-Modified Nickel-Cobalt Composite Coating as Cathode Materials for Hydrogen Evolution Reaction

La2O3-Modified Nickel-Cobalt Composite Coating as Cathode Materials for Hydrogen Evolution Reaction

Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis

Effect of Microstructure Factors on Stress Corrosion Behavior of Mg<i>-x</i>Sn Alloys (<i>x</i> = 2, 5, 8 mass%)

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La₂O₃-Modified Nickel-Cobalt Composite Coating as Cathode Materials for Hydrogen Evolution Reaction

La₂O₃-Modified Nickel-Cobalt Composite Coating as Cathode Materials for Hydrogen Evolution Reaction