Thermodynamic properties of selenides of transition metals

Blinder, A. V.; Bolgar, A. S.; Trofimova, Zh. A.

doi:10.1007/bf00559756

Cited by 16 publications

(16 citation statements)

References 18 publications

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“…Up to around 180 K, the results of calculation and experiment are in good agreement, especially with experimental data [9]. The irregular shape of the temperature dependence of the heat capacity in the region 180 -200 K in [10] is most 3 - [9]; 4adiabatic calorimetry from [10]; 5drop-calorimetry from [10].…”

Section: Thermodynamic Propertiessupporting

confidence: 65%

“…Their molar ΔfH ○ result of -234.2 ± 3.3 kJ⋅mol -1 at 298.15 K is in a formal agreement with the previous estimate by Mills [7] of -197 ± 42 kJ⋅mol -1 and the value of -272.0 ± 35.0 obtained by Viksman et al from the dissociation study [8], but the last two have too wide a range of uncertainty. Kiwia and Westrum in [9] measured the low-temperature heat capacity by adiabatic calorimetry, and Blinder et al published data in a broad temperature range from adiabatic and drop calorimetry in [10]. The indirect results from the dissociation study on the hightemperature thermodynamic properties are also given in [8].…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic properties of 2H-MoSe2 from first principles quasi-harmonic approximation

Vasiliev

2020

Phys. Chem. Solid St.

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In this paper, we report the results of first-principles calculation of 2H-MoSe2 thermodynamic properties within the quasi-harmonic approximation. The focus of the article is on the temperature dependencies of the heat capacity up to 1000 ℃ and values of enthalpy of formation, enthalpy, and entropy at 298,15 K, and their comparative analysis with the existing experimental data. The results show good general agreement with the published experimental data sets allowing to use them as arbitration of existing discrepancies. Increasing deviations of the heat capacity above the room temperature suggest that factors not included in the quasi-harmonic approximation, such as vibrational anharmonicity, may have a significant influence on the thermodynamics of 2H-MoSe2 in this temperature region. Considering the inconclusive high-temperature data from the experiment, the present results may be recommended as a satisfactory approximation until the appearance of more reliable experimental data or calculation results, taking into account more finite-temperature effects.

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Section: Thermodynamic Propertiessupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Thermodynamic properties of 2H-MoSe2 from first principles quasi-harmonic approximation

Vasiliev

2020

Phys. Chem. Solid St.

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“…The redox reaction can occur through the following reaction steps. The values for different quantities used are: f H(Cr 2 Se 3 ) = −174.9 kJ mol −1 , [26] S 0 (Cr 2 Se 3 ) = 175.4 JK −1 mol −1 , [27] S 0 (Cr) = 23.8 JK −1 mol −1 , and S 0 (Se) = 42.4 JK −1 mol −1 . [28] The negative free energy of the redox reaction indicates that the reduction of Ag 2 Se by Cr is thermodynamically favorable even at room temperature.…”

Section: Discussion On Interface Formationmentioning

confidence: 99%

Characterization of silver selenide thin films grown on Cr‐covered Si substrates

Mohanty

Malar

Osipowicz

et al. 2008

Surface & Interface Analysis

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Thermal stability of silver selenide thin films formed from the solid-state reaction of Ag-Se diffusion couples on Si substrates covered with a thin Cr film, is investigated. Glancing angle X-ray diffraction (GXRD), XPS, atomic force microscopy (AFM) and Rutherford backscattering spectrometry (RBS) are used to characterize the as-deposited films and those annealed at 100, 200, 300, and 400• C. The results reveal the formation of polycrystalline orthorhombic silver selenide films that remain stable without compositional change upon thermal annealing, in marked contrast to the agglomeration exhibited by silver selenide films deposited on Si without Cr film. The improvement in the thermal stability is attributed to compressive stress relief by a grainy morphology with large surface area, the formation of which is promoted by partially oxidized Cr adhesion film.

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“…200, 204, 206–209 A 2D material is thermodynamically able to undergo oxidation in aerobic biological environments if its φ ox value is lower (more negative) than that of the oxygen/water redox couple φ (O 2 /H 2 O) , and Fig. 7c shows that such oxidation is thermodynamically favorable for TMD materials.…”

Section: Fundamental Modes Of Biological Interactionmentioning

confidence: 99%

Biological and environmental interactions of emerging two-dimensional nanomaterials

Wang¹,

Zhu²,

Qiu³

et al. 2016

Chem. Soc. Rev.

239

210

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Two-dimensional materials have become a major focus in materials chemistry research worldwide with substantial efforts centered on synthesis, property characterization, and technological application. These high-aspect ratio sheet-like solids come in a wide array of chemical compositions, crystal phases, and physical forms, and are anticipated to enable a host of future technologies in areas that include electronics, sensors, coatings, barriers, energy storage and conversion, and biomedicine. A parallel effort has begun to understand the biological and environmental interactions of synthetic nanosheets, both to enable the biomedical developments and to ensure human health and safety for all application fields. This review covers the most recent literature on the biological responses to 2D materials and also draws from older literature on natural lamellar minerals to provide additional insight into the essential chemical behaviors. The article proposes a framework for more systematic investigation of biological behavior in the future, rooted in fundamental materials chemistry and physics. That framework considers three fundamental interaction modes: (i) chemical interactions and phase transformations, (ii) electronic and surface redox interactions, and (iii) physical and mechanical interactions that are unique to near-atomically-thin, high-aspect-ratio solids. Two-dimensional materials are shown to exhibit a wide range of behaviors, which reflect the diversity in their chemical compositions, and many are expected to undergo reactive dissolution processes that will be key to understanding their behaviors and interpreting biological response data. The review concludes with a series of recommendations for high-priority research subtopics at the “bio-nanosheet” interface that we hope will enable safe and successful development of technologies related to two-dimensional nanomaterials.

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Thermodynamic properties of selenides of transition metals

Cited by 16 publications

References 18 publications

Thermodynamic properties of 2H-MoSe2 from first principles quasi-harmonic approximation

Thermodynamic properties of 2H-MoSe2 from first principles quasi-harmonic approximation

Characterization of silver selenide thin films grown on Cr‐covered Si substrates

Biological and environmental interactions of emerging two-dimensional nanomaterials

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