The Thermodynamics of Solid Solutions of Ni(II)/Ni(IV) Oxo Compounds

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Title:The Thermodynamics of Solid Solutions of Ni(II)/Ni(IV) Oxo Compounds
Creators:
Balej, Jan
Divisek, Jiri
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 62, 9, pp. 1396-1402
Uncontrolled Keywords:Activity coefficients, Equilibrium potential, Nickel oxide electrode

Abstract

The measured data of equilibrium and rest potentials of higher nickel oxo compounds, <i>E'</i> (converted for 25 °C and <i>a</i><sub>H<sub>2</sub>O</sub> = <i>a</i><sub>KOH</sub> = <i>a</i><sub>H<sub>2</sub></sub> = 1.0) selected in the range of the overall oxidation number of 2.0 &lt; <i>z</i><sub>Ni</sub> ≤ 3.6, were newly evaluated with the aid of a simplified model of the quasi-binary solid solutions Ni(OH)<sub>2</sub>/Ni(OH)<sub>4 </sub>assuming unlimited miscibility. It was found that the dependence of <i>E'</i> on the composition of the redox system can be described by a Nernst equation in the entire range of <i>z</i><sub>Ni</sub> investigated, where the activity coefficients of individual components are expressed by relations for regular solutions. The so calculated activities of considered components showed positive deviations from the ideal behaviour of the solid solutions. All results obtained were discussed in more detail assuming the non-existence of Ni(III) oxo compounds in such solid solutions.

Title:The Thermodynamics of Solid Solutions of Ni(II)/Ni(IV) Oxo Compounds
Creators:
Balej, Jan
Divisek, Jiri
Uncontrolled Keywords:Activity coefficients, Equilibrium potential, Nickel oxide electrode
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:62
Number:9
Page Range:pp. 1396-1402
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19971396UNSPECIFIED
ID Code:1215
Item Type:Article
Deposited On:06 Feb 2009 17:07
Last Modified:06 Feb 2009 16:07

Citation

Balej, Jan; Divisek, Jiri (1997) The Thermodynamics of Solid Solutions of Ni(II)/Ni(IV) Oxo Compounds. Collection of Czechoslovak Chemical Communications, 62 (9). pp. 1396-1402. ISSN 0010-0765

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