On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution

Krstajić, N.V.; Popović, M.; Grgur, Branimir N.; Vojnović, M.V.; Šepa, D. B.

doi:10.1016/s0022-0728(01)00590-3

Cited by 232 publications

(160 citation statements)

References 31 publications

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“…4) showed a fairly good linear dependence for both examined fi bre electrodes, over the studied overpotential range. The above is consistent with the kinetically-controlled reaction [22][23][24][25] , which proceeds via the Volmer-Heyrovsky path (see equations 1 and 2 above). The exchange current-densities (j 0 ) for the HER were calculated based on the Butler-Volmer equation (see e.g.…”

Section: Sem Characterization Of Ru-modified Niccf Tow Electrodessupporting

confidence: 82%

Hydrogen evolution reaction at Ru-modified nickel-coated carbon fibre in 0.1 M NaOH

Pierożyński

Mikołajczyk

2015

Polish Journal of Chemical Technology

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The electrochemical activity towards hydrogen evolution reaction (HER) was studied on commercially available (Toho-Tenax) and Ru-modifi ed nickel-coated carbon fi bre (NiCCF) materials. Quality and extent of Ru electrodeposition on NiCCF tows were examined by means of scanning electron microscopy (SEM). Kinetics of the hydrogen evolution reaction were investigated at room temperature, as well as over the temperature range: 20-50 o C in 0.1 M NaOH solution for the cathodic overpotential range: -100 to -300 mV vs. RHE. Corresponding values of charge-transfer resistance, exchange current-density for the HER and other electrochemical parameters for the examined fi bre tow composites were recorded.

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Section: Sem Characterization Of Ru-modified Niccf Tow Electrodessupporting

confidence: 82%

Hydrogen evolution reaction at Ru-modified nickel-coated carbon fibre in 0.1 M NaOH

Pierożyński

Mikołajczyk

2015

Polish Journal of Chemical Technology

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“…Based on the linear relationship − log R ct versus overpotential (for kinetically controlled reactions), exhibited here over the overpotential range of 50-400 mV versus RHE (see Fig. 5 above), the exchange currentdensities for the HER were calculated based on the Butler-Volmer equation and through utilization of the relation between the exchange current density (j 0 ) and the R ct parameter for overpotential approaching zero value [5,[40][41][42]. Hence, the impedance-derived values of the j 0 parameter came to 1.2×10 −6 A cm −2 (at 20°C) and 2.0× were recorded for the Pd-modified nickel foam catalyst material (see Table 3 for details).…”

Section: −1mentioning

confidence: 99%

“…On the other hand, nickel makes one of the best non-noble catalyst materials suitable for hydrogen evolution reaction (HER) in alkaline media, primarily due to its high corrosion resistance at high pH values [1][2][3][4][5]. Nickel foams are made by chemical vapour deposition (CVD) [6], or electrochemical or electroless deposition method, typically with a polyurethane foam precursor [7].…”

Section: Introductionmentioning

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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“…Similar models have been used by other researchers. 23,24 As seen from Table S1, ABT showed the highest charge transfer resistance, which is associated with the lowest HER performance observed in 1 M H 2 SO 4 . The capacitance values are given as admittance values for leaky capacitors or constant phase elements.…”

mentioning

confidence: 97%

Metal-Rich Transition Metal Diborides as Electrocatalysts for Hydrogen Evolution Reactions in a Wide Range of pH

Sitler

Raja

Charit

2016

J. Electrochem. Soc.

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Solid solutions of HfB 2 -ZrB 2 mixtures were prepared by high-energy ball milling of diboride and additive powders followed by spark plasma sintering (SPS). A mixture of stoichiometric 1:1 HfB 2 -ZrB 2 borides was the base composition to which Hf, Zr, Ta, LaB 6 or Gd 2 O 3 was added. Hf, Zr and Ta were added in order to bring the boron-to-metal ratio down to 1.86, rendering the boride as MeB 1.86 . In the case of LaB 6 and Gd 2 O 3 , 1.8 mol% was added. Electroanalytical behavior of hydrogen evolution reactions was evaluated in 1 M H 2 SO 4 and 1 M NaOH solutions. The LaB 6 additive material showed Tafel slopes of 125 and 90 mV/decade in acidic and alkaline solutions respectively. The Hf and Zr rich samples showed Tafel slopes of about 120 mV/decade in both electrolytes. The overpotentials of hydrogen evolution reactions (at 10 mA/cm 2 ) in the alkaline solution were about 100 mV lower than those in acidic solution. The metal-rich diborides and addition of LaB 6 showed better hydrogen evolution reaction (HER) activities than the base 1:1 HfB 2 -ZrB 2 stoichiometric diboride solid solution. The higher activity of metal-rich borides could be attributed to the increased electron population at the d-orbitals of the metal shown by band structure modeling calculations using the Density Functional Theory approach. The electrochemical hydrogen evolution reaction (HER) pathways on a metal surface are given by Volmer-Heyrovsky-Tafel mechanisms as follows:The Volmer reactions are considered to be the discharge or adsorption reactions, Heyrovsky reactions are the charge or desorption reactions, and Tafel's is a recombination reaction with Tafel slopes of 118, 39, 29.5 mV/decade, respectively for the Volmer, Heyrovsky and Tafel equations.2 Since HER involves successive steps of adsorption and desorption of hydrogen atoms, the electrode material should have optimal binding energy for hydrogen for enhanced electrocatalysts. Platinum groups metals have the highest catalytic properties for HER. However, several earth abundant low cost alternative materials for HER are being investigated.3 Metal borides, such as MoB, 4,5 Co 2 B, 6 CoB, 7 and NiB 8,9 are reported as potential electrocatalysts for HER. The high catalytic activity of metal mono-borides is attributed to the electron transfer from boron to metal in the amorphous state that enriches the d-band electron density. 7 The stability of the monoborides is attributed to the ability of boron to prevent the metal from oxidizing by donating electrons to stabilize the valance state and reductively remove surface oxides. 4,9 Furthermore, the lattice strains involved in the process of boron incorporation in the metal lattice is believed to lower the energy barrier for catalytic reactions. Only limited investigations have been reported on metal diborides as electrocatalysts for HER. Layered titanium diborides with and without exfoliation were investigated 10 and a significantly high overpotential of >1 V RHE was reported for a HER current density of −10 mA/cm 2 . Metal-rich borides...

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On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution

Cited by 232 publications

References 31 publications

Hydrogen evolution reaction at Ru-modified nickel-coated carbon fibre in 0.1 M NaOH

Hydrogen evolution reaction at Ru-modified nickel-coated carbon fibre in 0.1 M NaOH

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

Metal-Rich Transition Metal Diborides as Electrocatalysts for Hydrogen Evolution Reactions in a Wide Range of pH

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