Studies of phase composition of Zn–Ni alloy obtained in acetate-chloride electrolyte by using XRD and potentiodynamic stripping

Petrauskas, А. V.; Grincevičienė, L.; Češūnienė, A.; Juškėnas, Remigijus

doi:10.1016/j.electacta.2004.07.044

Cited by 36 publications

(19 citation statements)

References 16 publications

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“…There are two more systems with intermediate phases investigated by the ALSV technique application, Ni-Zn [87][88][89][90] and Co-Zn [91]. As in above presented results, ALSV and X-ray analysis showed good agreement for both systems.…”

Section: Alloys Characterized With Intermediate Phases And/or Intermesupporting

confidence: 74%

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Electrodeposition and Characterization of Alloys and Composite Materials

Jović¹,

Lačnjevac²,

Jović³

2014

Electrodeposition and Surface Finishing

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Section: Alloys Characterized With Intermediate Phases And/or Intermesupporting

confidence: 74%

“…À complex [87]. Five alloy samples were deposited to the total charge of 1.3 C cm À2 at different potentials (À1.0, À1.4, À1.6, À1.8, and À2.0 V).…”

Section: Alloys Characterized With Intermediate Phases And/or Intermementioning

confidence: 99%

Electrodeposition and Characterization of Alloys and Composite Materials

Jović¹,

Lačnjevac²,

Jović³

2014

Electrodeposition and Surface Finishing

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“…The presence of a different kind of nickel on the electrode surface was indicated by the higher potential at which Ni(OH) 2 was oxidized to NiO(OH) (0.49 V vs 0.44 V) and regenerated by reduction of the latter (0.21 V vs 0.29 V) as well as by the presence of a shoulder at 0.35 V. The reduction peak of the species generated at 0.21 V on the Ni-Zn-P/C electrode, either Ni(OH) 2 to Ni 0 or NiO 2 H 2Àx to Ni(OH) 2 , occurred at slightly more negative potential as compared to the Ni-Zn/C electrode (À0.35 vs À0.30 V). The more complex nature of the Ni-Zn-P/C material, which is an actual Ni-Zn-P alloy, [48,[65][66][67] probably inhomogeneous, may well account for the different polarization values as well as the broadness of the current peaks. On the other hand, as observed for Ni-Zn/C, the addition of ethanol (inset of Figure 13) resulted in the complete disappearance of the NiO(OH) reduction peak in the reverse scan, which is consistent with an effective electrooxidation activity of ethanol.…”

Section: Electrochemical Characterization Of the Support Materialsmentioning

confidence: 95%

Ethanol Oxidation on Electrocatalysts Obtained by Spontaneous Deposition of Palladium onto Nickel‐Zinc Materials

et al. 2009

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Ni-Zn and Ni-Zn-P alloys supported on Vulcan XC-72 are effective materials for the spontaneous deposition of palladium through redox transmetalation with Pd(IV) salts. The materials obtained, Pd-(Ni-Zn)/C and Pd-(Ni-Zn-P)/C, have been characterized by a variety of techniques. The analytical and spectroscopic data show that the surface of Pd-(Ni-Zn)/C and Pd-(Ni-Zn-P)/C contain very small, highly dispersed, and highly crystalline palladium clusters as well as single palladium sites, likely stabilized by interaction with oxygen atoms from Ni--O moieties. As a reference material, a nanostructured Pd/C material was prepared by reduction of an aqueous solution of PdCl(2)/HCl with ethylene glycol in the presence of Vulcan XC-72. In Pd/C, the Pd particles are larger, less dispersed, and much less crystalline. Glassy carbon electrodes coated with the Pd-(Ni-Zn)/C and Pd-(Ni-Zn-P)/C materials, containing very low Pd loadings (22-25 microg cm(-2)), were studied for the oxidation of ethanol in alkaline media in half cells and provided excellent results in terms of both specific current (as high as 3600 A g(Pd)(-1) at room temperature) and onset potential (as low as -0.6 V vs Ag/AgCl/KCl(sat)).

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“…Peak D is typically attributed to the anodic dissolution of active porous Ni as it is believed that all of Zn has already dissolved at more negative potentials [11]. New cyclic voltammetry and partial potentiodynamic stripping data [17] indicate that under galvanostatic conditions (at 20°C, ratio [Zn ?2 ]/[Ni ?2 ] = 1:6.4) peak D can be assigned to oxidation of Zn-Ni alloy containing 42.4 at.% of Zn and 57.6 at.% Ni.…”

Section: Introductionmentioning

confidence: 98%

“…Analogous data were obtained by investigating Zn-Ni alloys deposited in a plating solution with the ratio [Zn ?2 ]/[Ni ?2 ] = 1:83 under galvanostatic conditions at 20°C [17]. Anodic current peak at E [ 0.0 V is in the same potential range as that of i a peak for Ni oxidation.…”

Section: Introductionmentioning

confidence: 98%

Influence of voltammetric parameters on Zn–Ni alloy deposition under potentiodynamic conditions

Petrauskas¹,

Grincevičienė²,

Češūnienė³

2009

J Appl Electrochem

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The phase composition of Zn-Ni alloys electrodeposited from acetate-chloride plating solutions containing Zn ?2 and Ni ?2 ions at ratio of 1-12.8 at 50°C was investigated by the potentiodynamic stripping method. Two anodic current density (i a ) peaks emerged in potentiodynamic stripping curves (PDC) at E \ 0.0 V and E [ 0.0 V (vs. Ag/AgCl/KCl sat ), that were attributed to oxidation of certain phases of the Zn-Ni alloy. The ratio of these phases in deposited Zn-Ni alloys under potentiodynamic conditions was affected by the potential sweep rate (m) and maximum cathodic current density (i c ) The ratio of Zn and Ni in certain phases of Zn-Ni alloy was determined by the partial potentiodynamic stripping technique. Experimental data show that Zn-Ni alloy, containing 6.5 at.% Zn and 93.5 at.% Ni and dissolved in i a peak H (E [ 0.0 V), provides the black coloration of the Zn-Ni alloy.

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Studies of phase composition of Zn–Ni alloy obtained in acetate-chloride electrolyte by using XRD and potentiodynamic stripping

Cited by 36 publications

References 16 publications

Electrodeposition and Characterization of Alloys and Composite Materials

Electrodeposition and Characterization of Alloys and Composite Materials

Ethanol Oxidation on Electrocatalysts Obtained by Spontaneous Deposition of Palladium onto Nickel‐Zinc Materials

Influence of voltammetric parameters on Zn–Ni alloy deposition under potentiodynamic conditions

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