The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions

Bohé, Ana E.; Vilche, J. R.; Arvía, Alejandro Jorge

doi:10.1007/bf01076050

Cited by 11 publications

(11 citation statements)

References 24 publications

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“…In all cases, an anodic plateau appears at ca. 0.2 V indicating the formation of a passive film composed probably by Ni(OH) 2 and NiCO 3 , as previously reported when polycrystalline nickel electrodes are immersed in different carbonate-bicarbonate ion containing solutions [16]. As in PBS, the main feature is related to the presence of Cl À that affects the passive layer leading to its breakdown and the dissolution of Ni at lower potential values.…”

Section: Cyclic Voltammetry In Cbssupporting

confidence: 54%

“…Indeed, it is quite evident that upon scanning the potential towards E < À0.8 V, a large cathodic current appears (Figure 6c). The cathodic reaction that renews the electrode surface can be attributed to the reduction of NiCO 3 and/or Ni(OH) 2 , as mentioned above and already suggested [10,11,15,16]. This allows defining the experimental conditions where the Ni electrode can be freshly renewed.…”

Section: Cyclic Voltammetry In Cbsmentioning

confidence: 99%

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Electrochemical Characterization of Nickel Electrodes in Phosphate and Carbonate Electrolytes in View of Assessing a Medical Diagnostic Device for the Detection of Early Diabetes

et al. 2010

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In view of optimizing a multi-electrode device using proprietary technology for noninvasive assessment of eccrine sweat gland activity and thus the early detection of diabetes, we thoroughly explored the electrochemical behavior of a nickel electrode in a three-electrode set up combining a nickel counter electrode and a nickel pseudo-reference electrode in synthetic buffered phosphate and carbonate solutions in presence of chloride, lactate and urea that mimic the composition of physiological sweat. This approach provides insight into the origin of the onset of responses measured upon the application of low voltage potential with variable amplitudes to Ni electrodes on the skin. For low voltage amplitude of ca. DE = 0.6 V, the electrochemical reactions measured at the electrodes are those related to the oxidation of Ni leading to the formation of a passive layer, as well as the reduction of this passive layer. For voltage amplitude higher than 1 V, or current densities higher than 1 mA/cm 2 , the breakdown of the passive layer becomes the main electrochemical anodic reaction, while its reduction and the electrolytic solution govern the cathode reactions. This brings explanation of the nonlinear current-voltage features measured during the clinic tests. Finally, the obtained results make possible the definition of the experimental electrochemical conditions where the Ni electrodes can be renewed.

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Section: Cyclic Voltammetry In Cbssupporting

confidence: 54%

Section: Cyclic Voltammetry In Cbsmentioning

confidence: 99%

Electrochemical Characterization of Nickel Electrodes in Phosphate and Carbonate Electrolytes in View of Assessing a Medical Diagnostic Device for the Detection of Early Diabetes

et al. 2010

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“…The cur rent con tri bu tion at about 0.6 V can be as so ciated with the re dox cou ple Ni(II)/Ni(III) 11 . It is worth noting that this cur rent peak ap pears at more pos i tive po ten tials for the non Co-containing al loy.…”

Section: Re Sults and Discussionmentioning

confidence: 74%

“…0.05 V, re lated to the ox i da tion of Co(II) to Co(III) ox ides or hy drox ides 12 , and a third an odic cur rent peak (Peak III) at ca . 0.7 V, as so ci ated with the re dox couple Ni(II)/Ni(III) 11 . The cur rent val ues of each peak are com plex func tions of the pH, ionic strength, and car bonate/bi car bon ate ra tio.…”

Section: Re Sults and Discussionmentioning

confidence: 85%

“…The voltammetric pro file in 0.05 M K 2 CO 3 + 0.75 M KHCO 3 (pH 8.9) shows a first an odic cur rent peak (Peak I) at ca. -0.3 V, as so ci ated with Ni/Ni(II) hydrox ide trans for ma tion 11 , a sec ond an odic con tri bu tion (Peak II) at ca. 0.05 V, re lated to the ox i da tion of Co(II) to Co(III) ox ides or hy drox ides 12 , and a third an odic cur rent peak (Peak III) at ca .…”

Section: Re Sults and Discussionmentioning

confidence: 87%

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An electrochemical study of the corrosion processes of Ni-based glassy metals in aqueous solutions

Barbosa

Gassa

1997

J. Braz. Chem. Soc.

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O comportamento eletroquímico de ligas amorfas Ni-Co em soluções de carbonato/bicarbonato foi investigado usando espectroscopia de impedância eletroquímica combinada com voltametria e técnicas de polarização estacionárias. Os resultados indicam que a cinética do processo de dissolução é dependente do pH e da força iônica da solução eletrolítica. A composição do metal vítreo é um fator importante na determinação dos parâmetros cinéticos envolvidos no complexo comportamento eletroquímico desses materiais.The elec tro chem i cal be hav ior of amor phous Ni-Co al loys in car bon ate/bi car bon ate so lutions was in ves ti gated us ing elec tro chem i cal im ped ance spec tros copy com bined with voltammetry and sta tion ary po lar iza tion tech niques. The re sults in di cate that the ki net i cs of the dis so lu tion pro cesses are de pend ent on the pH and ionic strength of the elec tro lyte. The co m posi tion of the glassy metal is an im por tant fac tor in de ter min ing the ki netic pa ram e ters in volved in the com plex elec tro chem i cal be hav ior of these ma te ri als. Key words: im ped ance spec tros copy, glassy met als, Ni-Co al loys In tro duc tionNi-Co amor phous al loys pres ent an electrocatalytic activ ity on the OER in al ka line so lu tion which is higher than that of their crys tal line coun ter parts 1-8, and ref er ence therein . The use of these ma te ri als re quires a sat is fac tory re sis tance to gen eral and lo cal ized cor ro sion. It has been found 9 that the cor ro sion be hav ior of dif fer ent polycrystalline Ni-Co alloys is a func tion of al loy com po si tion.A cor ro sion study of Ni-Co based glassy met als in carbon ate-bicarbonate so lu tions at pH 8.9 showed that the disso lu tion pro cesses are de pend ent on the ionic strength of the elec tro lyte 10 . The pres ent study was un der taken in or der to eval u ate the in flu ence of the pH and ionic strength of the elec tro lyte, as well as the al loy com po si tion, on the cor ro sion be hav ior of a glassy Ni-based al loy (Vitrovac 0080), and to com pare these re sults with Ni-Co based al loys. Ex per i men talAmor phous al loys (Vakuumschmelze GmbH, Hanau) with the com po si tions Vitrovac 0080 (Ni 78 B14 Si 8), G15 (Ni 58 Co 20 B12 Si 10 ) and G16(Ni 25 Co 50 B10 Si 15 ), were employed as the work ing elec trodes. A con ven tional three-compartment glass cell was used with a large area Pt coun ter elec trode and a cal o mel ref er ence elec trode. Po tentials in the text are re ferred to the nor mal hy dro gen electrode (NHE) scale.Elec tro chem i cal im ped ance spec tros copy (EIS) combined with steady-state cur rent den sity/po ten tial (j/E) curves, and sin gle (STPS) and re pet i tive (RTPS) tri an gu lar po ten tial sweeps, were per formed un der pu ri fied N 2 gas sat u ra tion in the fol low ing so lu tions: x M KHCO 3 + y M K2CO 3 (0.75 ≤ x ≤ 2.5; 0.05 ≤ y ≤ 0.5), cov er ing the 8.3-10.5 pH range at 25 °C.Ar ti cle

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Electrochemical Behavior of Electrode Materials (Nickel and Stainless Steels) for Sudomotor Dysfunction Applications: A Review

et al. 2018

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This is an overview of the electrochemical characterization of nickel and stainless steel (so‐called SS) as electrodes in medical devices for the early diagnosis of small fiber neuropathy that originates from type‐2 diabetes or cystic fibrosis. The electrical current responses obtained during the clinical tests are related to the amount of chloride present on the sweat. SS electrodes are now used to replace nickel because this later not only presents problems with chloride sensitivity but its contact with skin can cause possible allergic reactions for some patients. For the above reasons, several types of SS were studied. It was shown that some of them perform well and have lower costs than Ni electrodes. We discuss the state of the art of the electrochemical studies conducted with nickel and steels under physiological or biomimetic conditions and discuss the advantages of a particular steel over the others depending on the conditions, especially chloride concentration.

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The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions

Cited by 11 publications

References 24 publications

Electrochemical Characterization of Nickel Electrodes in Phosphate and Carbonate Electrolytes in View of Assessing a Medical Diagnostic Device for the Detection of Early Diabetes

Electrochemical Characterization of Nickel Electrodes in Phosphate and Carbonate Electrolytes in View of Assessing a Medical Diagnostic Device for the Detection of Early Diabetes

An electrochemical study of the corrosion processes of Ni-based glassy metals in aqueous solutions

Electrochemical Behavior of Electrode Materials (Nickel and Stainless Steels) for Sudomotor Dysfunction Applications: A Review

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