The non-equilibrium phases in the nanostructured Cd–Ni powders and their specific formation

Zaharov, Yu. A.; Пугачев, В. М.; Valnukova, Acy; Russakov, D. М.; Ivanova, Natalia V.; Dodonov, V. G.; Kolmykov, R. P.

doi:10.1088/2053-1591/aaf3ad

Cited by 1 publication

(2 citation statements)

References 14 publications

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“…The insets in Figure 6 (a) and (b), showed the CVs throughout the entire range of explored potentials. Although these events are not easy to explain, they could be due to the formation of various species of monometallic and bimetallic hydroxides in the Cd-Ni system, as described elsewhere 30 . In all cases, the HER results deserve to be compared from the kinetic point of view, which will be discussed in the next section.…”

Section: Open Circuit Potential and Cyclic Voltammetry Analysis Of Th...mentioning

confidence: 91%

“…Also, nickel electro-crystallization is a highly inhibited process 29 , so this response of the electrodeposition system could be created by adsorbed cadmium species on the surface of the electrode. It has been reported in the literature 30,31 , that electrodeposited Cd-Ni alloys usually form stable intermediate phases, i.e. βCd 5 Ni and γCdNi, whose combination can be found at nickel contents between6 % and 5 % (wt.).…”

Section: Table 3 Normalized Eds Microchemical Composition Of the Obta...mentioning

confidence: 99%

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Micro-recycling of spent Ni-Cd batteries for the obtention of electrocatalytic coatings

Delvasto

Rueda

Monsalve

et al. 2022

Preprint

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A micro-recycling approach was explored to produce catalytic metallic coatings for the hydrogen evolution reaction (HER). For this aim, discarded Ni-Cd batteries were employed as raw material. After dismantling the batteries, the active powder material, containing Cd and Ni compounds, was leached in a solution containing citric acid and hydrogen peroxide. The dissolved metals were electro-deposited on copper plates using a two electrodes cell at the following potentials (mV): -1900, -2000, and -2100 mV. The CdNi coating produced at -2000 mV, contained 92.6 % Cd and 7.4 % Ni. This coating was studied by cyclic voltammetry (CV) and potentiodynamic analysis in two different KOH solutions (0.1 M and 1.0 M). The CV analysis showed that the CdNi electrode was electrochemically stable in a wide operating voltage range (between oxygen evolution reaction and HER). Using an uncompensated resistance correction, the Tafel slopes for HER were obtained. The potentiodynamic analysis revealed that the synthesized CdNi electrode showed a catalytic activity for HER just 25.5 % smaller than the correspondent response of a standard pure Ni electrode. Our results serve as a proof of concept about the application of micro-recycling of spent batteries to produce sustainable electroactive catalytic materials for hydrogen production.

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Section: Open Circuit Potential and Cyclic Voltammetry Analysis Of Th...mentioning

confidence: 91%

Section: Table 3 Normalized Eds Microchemical Composition Of the Obta...mentioning

confidence: 99%

Micro-recycling of spent Ni-Cd batteries for the obtention of electrocatalytic coatings

Delvasto

Rueda

Monsalve

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

The non-equilibrium phases in the nanostructured Cd–Ni powders and their specific formation

Cited by 1 publication

References 14 publications

Micro-recycling of spent Ni-Cd batteries for the obtention of electrocatalytic coatings

Micro-recycling of spent Ni-Cd batteries for the obtention of electrocatalytic coatings

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