Utilization of special potential scan programs for cyclic voltammetric development of different nickel oxide-hydroxide species on Ni based electrodes

Special potential scan programs were designed for cyclic voltammetric development of β-NiOOH or γ-NiOOH/ β-NiOOH mixtures on the surface of nickel or nickel-chromium (80:20) alloy electrodes in NaOH 0.10 M. The programs consisted on changing the anodic or cathodic switching limit to facilitate the c...

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Detalles Bibliográficos
Autores principales: Pissinis, Diego Ezequiel, Sereno, Leónides Edmundo, Marioli, Juan Miguel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Exactas
Química
Nickel
Nickel-Chromium Alloy
Oxides
Cyclic voltammetry
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/100757
https://ri.conicet.gov.ar/11336/62801
http://file.scirp.org/Html/4-1230037_17535.htm
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-100757
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Nickel
Nickel-Chromium Alloy
Oxides
Cyclic voltammetry
spellingShingle Ciencias Exactas
Química
Nickel
Nickel-Chromium Alloy
Oxides
Cyclic voltammetry
Pissinis, Diego Ezequiel
Sereno, Leónides Edmundo
Marioli, Juan Miguel
Utilization of special potential scan programs for cyclic voltammetric development of different nickel oxide-hydroxide species on Ni based electrodes
topic_facet Ciencias Exactas
Química
Nickel
Nickel-Chromium Alloy
Oxides
Cyclic voltammetry
description Special potential scan programs were designed for cyclic voltammetric development of β-NiOOH or γ-NiOOH/ β-NiOOH mixtures on the surface of nickel or nickel-chromium (80:20) alloy electrodes in NaOH 0.10 M. The programs consisted on changing the anodic or cathodic switching limit to facilitate the chemical reactions taking place either between Ni(II) hydroxides or between Ni(III) oxides-hydroxides. The electrochemical charge density under the oxidative wave, observed at Ni or Ni-Cr electrode surfaces at approximately 0.48 V (vs SCE), remained almost con- stant with the number of cv cycles after approximately 600 cv cycles at 0.050 V/s. Thus, it can be suggested that a stable proportion of Ni(II)/Ni(III) oxides-hydroxides was obtained on the electrode surfaces. The relative amounts of β-NiOOH or γ-NiOOH species were calculated from the electrochemical charges under their reduction waves in the voltammetric experiments. Higher charge densities were always obtained with Ni-Cr alloy electrodes as compared to pure Ni electrodes. Linear relationships were obtained in our study on the dependence of the oxidative peak current with the square root of the scan rate at a scan rate range between 0.01 V/s and 0.16 V/s.
format Articulo
Articulo
author Pissinis, Diego Ezequiel
Sereno, Leónides Edmundo
Marioli, Juan Miguel
author_facet Pissinis, Diego Ezequiel
Sereno, Leónides Edmundo
Marioli, Juan Miguel
author_sort Pissinis, Diego Ezequiel
title Utilization of special potential scan programs for cyclic voltammetric development of different nickel oxide-hydroxide species on Ni based electrodes
title_short Utilization of special potential scan programs for cyclic voltammetric development of different nickel oxide-hydroxide species on Ni based electrodes
title_full Utilization of special potential scan programs for cyclic voltammetric development of different nickel oxide-hydroxide species on Ni based electrodes
title_fullStr Utilization of special potential scan programs for cyclic voltammetric development of different nickel oxide-hydroxide species on Ni based electrodes
title_full_unstemmed Utilization of special potential scan programs for cyclic voltammetric development of different nickel oxide-hydroxide species on Ni based electrodes
title_sort utilization of special potential scan programs for cyclic voltammetric development of different nickel oxide-hydroxide species on ni based electrodes
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/100757
https://ri.conicet.gov.ar/11336/62801
http://file.scirp.org/Html/4-1230037_17535.htm
work_keys_str_mv AT pissinisdiegoezequiel utilizationofspecialpotentialscanprogramsforcyclicvoltammetricdevelopmentofdifferentnickeloxidehydroxidespeciesonnibasedelectrodes
AT serenoleonidesedmundo utilizationofspecialpotentialscanprogramsforcyclicvoltammetricdevelopmentofdifferentnickeloxidehydroxidespeciesonnibasedelectrodes
AT mariolijuanmiguel utilizationofspecialpotentialscanprogramsforcyclicvoltammetricdevelopmentofdifferentnickeloxidehydroxidespeciesonnibasedelectrodes
bdutipo_str Repositorios
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