Transition metal-based hydrogen electrodes in alkaline solution ? electrocatalysis on nickel based binary alloy coatings

Raj, I. Arul; Vasu, K.I.

doi:10.1007/bf01012468

Cited by 286 publications

(136 citation statements)

References 17 publications

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“…In commercial alkaline fuel cells, Raney Ni has been used as the anode catalyst [102]. Raney Ni is functional under highly alkaline conditions (e.g., 6 mol L −1 KOH), and the HOR activity can be further improved by fabrication of Ni alloys, such as NiMo [97,103] and NiCr [104]. Fuel cells of this type have been successfully used in space.…”

Section: Science China Materialsmentioning

confidence: 99%

Electrocatalysts for hydrogen oxidation and evolution reactions

Zhuang

2016

Sci. China Mater.

149

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Section: Science China Materialsmentioning

confidence: 99%

Electrocatalysts for hydrogen oxidation and evolution reactions

Zhuang

2016

Sci. China Mater.

149

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“…In those works, Ni-Fe codeposits were electroplated on mild steel using different electrodeposition baths and evaluated for the her in both water and chlor-alkali electrolysers. The Ni-Fe codeposits were found to have a good performance for the her for long-term operation, but the stability of the plating bath was very poor particularly, due to a predominant precipitation of Fe(OH) 2 . This causes a rapid loss of bath activity resulting in higher costs for industrial application.…”

Section: Introductionmentioning

confidence: 99%

“…Nickel based electrodes are amongst the more active electrode materials for the her in alkaline solutions [1][2][3][4][5][6][7]. A combination of a large surface area with an enhanced catalytic activity, enables codeposits of Ni with other metals such as Co, Zn or Fe, to operate at overpotentials for the her close to 100 mV, well below the value of ~ 400 mV typically observed under industrial conditions [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and physical characterization of Ni-Cu-Fe alloy for chlor-alkali hydrogen cathodes

Giz¹,

Marengo²,

Ticianelli³

et al. 2003

Eclet. Quím.

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This work describes the development of an alternative acetate bath for the electrochemical codeposition of Ni-Cu-Fe electrodes at low pH that is stable for several weeks and produces electrodes with good performance for chlor-alkali electrolysis. Physical characterization of the electrode surface was made using X ray absorption spectroscopy (XAS), scanning electron microscopy (SEM) and energy dispersive analysis (EDX). The evaluation of the material as electrocatalyst for the hydrogen evolution reaction (her) was carried out in brine solution (160 g L -1 NaCl + 150 g L -1 NaOH) at different temperatures through steady-state polarization curves. The Ni-Cu-Fe electrodes obtained with this bath have shown low overpotentials for the her, around 0.150 V at 353 K, and good stability under continuous long-term operation for 260 hours. One positive aspect of this cathode is that the polarization behavior of the material shows only one Tafel slope over the temperature range of 298 -353 K.

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“…Basically, this reaction composed of two steps: adsorption and electrochemical reaction on the anode surface. 4 Consequently, due to the high adsorption capacity, carbon-based supports are widely exploited to improve the electrocatalytic e±-ciency for many electrodes. 5,6 Nano¯bers have been used in several¯elds including engineering, biology and chemical synthesis.…”

Section: Introductionmentioning

confidence: 99%

Cobalt/Chromium Nanoparticles-Incorporated Carbon Nanofibers as Effective Nonprecious Catalyst for Methanol Electrooxidation in Alkaline Medium

Mohamed

Motlak

Fouad

et al. 2016

NANO

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Cobalt-Chrome nanoparticles-incorporated carbon nano¯bers (CNFs) are proposed as an e®ec-tive nonprecious electrocatalyst for methanol oxidation in the alkaline media. The introduced nano¯bers were prepared by simple technique, electrospinning. Carbonization of as-spun mat composed of chromium acetate, cobalt acetate and poly(vinyl alcohol) (PVA) at high temperature (900 C) leads to production of the introduced nano¯bers. The physicochemical characteristics were investigated by X-ray di®ractometer (XRD), scanning electron microscope (SEM), eld emission scanning electron microscope (FESEM), transmission electron microscope (TEM) equipped with EDX and TEM mapping. The exploited analyses con¯rmed that the¯nal product is in the form of CNFs decorated by Co/Cr nanoparticles. Based on the results obtained from the cyclic voltammetry (CV) measurements, the proposed Co/Cr-incorporated CNFs possess high electrocatalytic activity toward methanol electrooxidation as a clear peak of methanol oxidation appeared with corresponding current density of 56 mA/cm 2 . Moreover, the current density increased by increasing methanol concentration up to 4.0 M. Overall, the proposed nano¯bers open new avenue for platinum-free and stable nanostructural catalysts for fuel cell technology.

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Transition metal-based hydrogen electrodes in alkaline solution ? electrocatalysis on nickel based binary alloy coatings

Cited by 286 publications

References 17 publications

Electrocatalysts for hydrogen oxidation and evolution reactions

Electrocatalysts for hydrogen oxidation and evolution reactions

Electrochemical and physical characterization of Ni-Cu-Fe alloy for chlor-alkali hydrogen cathodes

Cobalt/Chromium Nanoparticles-Incorporated Carbon Nanofibers as Effective Nonprecious Catalyst for Methanol Electrooxidation in Alkaline Medium

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