Thermodynamic properties of cobalt-selenium alloys

Jelinek, H.F.; Komarek, K. L.

doi:10.1007/bf00912967

Cited by 20 publications

(1 citation statement)

References 12 publications

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“…This is characteristic of the induced underpotential deposition mechanism, known as Kröger's mechanism, 34 which is caused by the large energy release in the formation of cobalt selenides. For instance, the value of the Gibbs free energy of the formation of CoSe is Ϫ40.74 kJ/mol 35 and, therefore, the redox potential of the reaction in Eq. 6 is shifted by an amount of −⌬G/2F = +0.211 V theoretically with respect to the standard deposition potential of metallic cobalt.…”

Section: Resultsmentioning

confidence: 99%

Electrodeposition of Cobalt Selenide Thin Films

Liu

Wang

Lai

et al. 2010

J. Electrochem. Soc.

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Cobalt selenide thin films have been prepared onto tin oxide glass substrates by electrodeposition potentiostatically from an aqueous acid bath containing normalH2SeO3 and Co(CH3COO)2 at 50°C . The electrodeposition mechanism was investigated by cyclic voltammetry. The morphological, compositional, structural, and optical properties of the deposited films have been studied using scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and optical absorption techniques, respectively. The formation of cobalt selenide was confirmed to proceed via an underpotential deposition mechanism. Se-rich CoSe thin films with compact and homogeneous morphology and hexagonal crystal structure were obtained at a deposition potential of −0.5 V vs saturated calomel electrode. The electrodeposited CoSe film exhibits an optical absorption coefficient of higher than 105cm−1 and an optical bandgap of 1.53±0.01eV .

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Section: Resultsmentioning

confidence: 99%

Electrodeposition of Cobalt Selenide Thin Films

Liu

Wang

Lai

et al. 2010

J. Electrochem. Soc.

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Vapor pressure methods: A source of experimental thermodynamic data

Ipser

1998

Ber Bunsenges Phys Chem

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An overview is given of the vapor pressure methods which are used for the determination of partial thermodynamic quantities. The methods are divided into four groups: static methods (pressure gauges, atomic absorption, and others); dynamic methods (boiling point method, transpiration method); effusion methods (Langmuir method, different variants of the Knudsen method); equilibration methods (equilibration with gas mixtures, isopiestic method, dew point method). The characteristics of each group are discussed shortly, and some examples of application are given from the recent literature.

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