Electrodeposition of nickel–copper alloys to use as a cathode for hydrogen evolution in an alkaline media

Ngamlerdpokin, Krit; Tantavichet, Nisit

doi:10.1016/j.ijhydene.2013.12.013

Cited by 90 publications

(49 citation statements)

References 22 publications

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“…Ac onsistent example is NiÀCu, which shows ag reater HER performance than Ni and Cu in alkaline conditions. [93][94][95][96][97] Another promising materiali sN i À Mo; [98][99][100][101] however,t here have been issues associated with its low dispersion of the actives urface. Ab reakthrough study in this context was reported in 2013, in which highly dispersed NiÀMo nanopowders were successfully prepared and utilized.…”

Section: Her At Extreme Ph:general Aspects and Introduction To The Inmentioning

confidence: 99%

Towards Versatile and Sustainable Hydrogen Production through Electrocatalytic Water Splitting: Electrolyte Engineering

2017

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Recent advances in power generation from renewable resources necessitate conversion of electricity to chemicals and fuels in an efficient manner. Electrocatalytic water splitting is one of the most powerful and widespread technologies. The development of highly efficient, inexpensive, flexible, and versatile water electrolysis devices is desired. This review discusses the significance and impact of the electrolyte on electrocatalytic performance. Depending on the circumstances under which the water splitting reaction is conducted, the required solution conditions, such as the identity and molarity of ions, may significantly differ. Quantitative understanding of such electrolyte properties on electrolysis performance is effective to facilitate the development of efficient electrocatalytic systems. The electrolyte can directly participate in reaction schemes (kinetics), affect electrode stability, and/or indirectly impact the performance by influencing the concentration overpotential (mass transport). This review aims to guide fine‐tuning of the electrolyte properties, or electrolyte engineering, for (photo)electrochemical water splitting reactions.

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Section: Her At Extreme Ph:general Aspects and Introduction To The Inmentioning

confidence: 99%

Towards Versatile and Sustainable Hydrogen Production through Electrocatalytic Water Splitting: Electrolyte Engineering

2017

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“…In procedures utilized we detected an amount of chromium in the electrolyte that exceeded the sum of the amounts of Fe and Ni in the electrolyte significantly (Table S3) [66] , and a number of groups [67,68] Table 3. The electrode area was 1.5 cm 2 (Elox300, Elox480), respectively 2 cm 2 (IrO 2 -RuO 2 ).…”

Section: The Composition Of the Electrolytementioning

confidence: 99%

Stainless steel made to rust: a robust water-splitting catalyst with benchmark characteristics

Schäfer

Sadaf

Walder

et al. 2015

Energy Environ. Sci.

198

207

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The oxygen evolution reaction (OER) is known as the efficiency-limiting step for the electrochemical cleavage of water mainly due to the large overpotentials commonly used materials on the anode side cause. Since Ni-Fe oxides reduce overpotentials occurring in the OER dramatically they are regarded as anode materials of choice for the electrocatalytically driven water-splitting reaction. We herewith show that a straightforward surface modification carried out with AISI 304, a general purpose austenitic stainless steel, very likely, based upon a dissolution mechanism, to result in the formation of an ultra-thin layer consisting of Ni, Fe oxide with a purity > 99%. The Ni enriched thin layer firmly attached to the steel substrate is responsible for the unusual highly efficient anodic conversion of water into oxygen as demonstrated by the low overpotential of 212 mV at 12 mA/cm 2 current density in 1 M KOH, 269.2 mV at 10 mA/cm 2 current density in 0.1 M KOH respectively. The Ni, Fe-oxide layer formed on the steel creates a stable outer sphere, and the surface oxidized steel samples proved to be inert against longer operating times (> 150 ks) in alkaline medium. In addition Faradaic efficiency measurements performed through chronopotentiometry revealed a charge to oxygen

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“…The linear form of Equation is (Equation ):

η = a + b ln ((), i)

where a is the linear coefficient, and b is the angular coefficient of the equation and called Tafel cathodic constant. The a coefficient allows the determination of the exchange current density , while b is related to the charge transfer coefficient α 32 . The exchange current allows to verify the catalytic activity of the system, while the angular Tafel constant allows to determine the mechanism of the reaction .…”

Section: Resultsmentioning

confidence: 99%

Effect of different carbon supports for Ni particles for the HER in tetra‐alkylammonium‐sulfonic acid media

et al. 2019

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Summary Vitreous carbon (VC) and pyrolytic carbon (PC) were covered by nickel particles through sputter deposition, consisting in the Ni/VC and Ni/PC electrodes, respectively. These materials were tested as cathodes in an aqueous solution of tetrafluoroborate of the 3‐triethylammonium‐propane sulfonic acid ionic liquid (TEA‐PS.BF4) for hydrogen production and characterized by scanning electron microscopy (SEM), chronoamperometry (CA), linear and cyclic voltammetry (LV and CV), and electrochemical impedance spectroscopy (EIS). The mechanism of the hydrogen evolution reaction (HER) was that of Volmer‐Heyrovsky for all the cathodes tested, and the H2 desorption at the catalytic surface is the determining step. The results indicate that different carbon supports can affect the efficiency of the particulate electrocatalyst deposited on it. The low values of H+ adsorption and the H2 desorption resistances of the modified PC system (0.43 and 0.8 Ω cm2, respectively), in relation to the modified VC system (1.13 and 7.9 Ω cm2, respectively), attest that Ni particles presence on PC favored the adsorption of H+ and H2 nanobubble desorption. The Ni particles on PC increase exchange current density (80.5 μA cm2 for Ni/PC cathode about 38.3 Ω cm2 for Ni/VC cathode) and enhance catalytic activity. These results can be attributed to the faster liberation of the active sites due to the interaction between the Ni particles and the PC support. In addition, the TEA‐PS.BF4 solution can act as a stripper, avoiding the formation of passive oxides in the open circuit and preventing the deactivation of the electrocatalyst.

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Electrodeposition of nickel–copper alloys to use as a cathode for hydrogen evolution in an alkaline media

Cited by 90 publications

References 22 publications

Towards Versatile and Sustainable Hydrogen Production through Electrocatalytic Water Splitting: Electrolyte Engineering

Towards Versatile and Sustainable Hydrogen Production through Electrocatalytic Water Splitting: Electrolyte Engineering

Stainless steel made to rust: a robust water-splitting catalyst with benchmark characteristics

Effect of different carbon supports for Ni particles for the HER in tetra‐alkylammonium‐sulfonic acid media

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