Oscillations as an instrument in controllable electrodeposition of micro- and nanomaterials

Tsirlina, Galina A.

doi:10.1016/j.coelec.2023.101226

Cited by 2 publications

(2 citation statements)

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“…11−14 This provides a vista to control the microstructure and thickness of the deposited layers. 15,16 Widely studied oscillatory systems involve (electro-)chemical processes coupled with the diffusion of the solution species to the interface, e.g., oscillatory systems involving adsorption/desorption of metal−ligand complexes and the dissolution of the passive hydroxide layer. 17 We recently reported a new type of oscillatory system during the electrodeposition of cobalt involving adsorbed hydrogen and its chemical scavenging by hydrogenation of organic additives and the dissolution of passive cobalt hydroxide layers under diffusion control.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Electrochemical oscillation is a unique phenomenon observed during electrodeposition, − electrodissolution, − and electrocatalytic processes, − where complex surface chemical and electrochemical processes are expected to take place. Electrodeposition of metals and alloys has been shown to possess negative differential resistances (NDRs) or hidden-NDRs with electrochemical oscillation. − This provides a vista to control the microstructure and thickness of the deposited layers. , Widely studied oscillatory systems involve (electro-)chemical processes coupled with the diffusion of the solution species to the interface, e.g., oscillatory systems involving adsorption/desorption of metal–ligand complexes and the dissolution of the passive hydroxide layer . We recently reported a new type of oscillatory system during the electrodeposition of cobalt involving adsorbed hydrogen and its chemical scavenging by hydrogenation of organic additives and the dissolution of passive cobalt hydroxide layers under diffusion control .…”

Section: Introductionmentioning

confidence: 99%

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Potential Oscillations During Cobalt–Nickel Electrodeposition in the Presence of Butynediol

Kiruba,

Jeyabharathi

2023

J. Phys. Chem. C

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Electrochemical potential oscillation is observed during the electrodeposition of CoNi in the presence of butynediol (BD). Modulation of the potential oscillatory pattern occurs due to the influence of differing proton and BD concentrations through diffusion/convective diffusion on the surface processes. The potential oscillation observed is a relaxation type as a result of the interplay between (a) hydrogen adsorption by proton reduction and the scavenging of adsorbed hydrogen by BD and (b) CoNi hydroxide precipitation by water reduction and the dissolution of CoNi hydroxide by protons. Moreover, the precipitation of CoNi hydroxide occurs at a lower current density while the BD concentration is high, whereas the absence of BD necessitates a higher current density for observing the precipitation. This result suggests that BD plays a critical role in altering the interfacial pH during CoNi electrodeposition.

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Section: ■ Introductionmentioning

confidence: 99%