Calcium Ruthenates: Determination of Gibbs Energies of Formation Using Electrochemical Cells

2003 ◽  
Vol 150 (4) ◽  
pp. E227 ◽  
Author(s):  
K. Thomas Jacob ◽  
Kay Thi Lwin ◽  
Yoshio Waseda
Keyword(s):  
Electrochemical Cells ◽  
Gibbs Energies

Calcium Ruthenates: Determination of Gibbs Energies of Formation Using Electrochemical Cells.

ChemInform ◽  
2003 ◽  
Vol 34 (27) ◽  
Author(s):  
K. Thomas Jacob ◽  
Kay Thi Lwin ◽  
Yoshio Waseda
Keyword(s):  
Electrochemical Cells ◽  
Gibbs Energies

scholarly journals The Equilibrium Phase Formation and Thermodynamic Properties of Functional Tellurides in the Ag–Fe–Ge–Te System

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1314
Author(s):  
Mykola Moroz ◽  
Fiseha Tesfaye ◽  
Pavlo Demchenko ◽  
Myroslava Prokhorenko ◽  
Nataliya Yarema ◽  
...  
Keyword(s):  
Electromotive Force ◽  
Equilibrium Phase ◽  
Stoichiometric Composition ◽  
Negative Electrode ◽  
Electrochemical Cells ◽  
Thermodynamic Quantities ◽  
Positive Electrodes ◽  
Gibbs Energies ◽  
Buffer Region ◽  
First Time

Equilibrium phase formations below 600 K in the parts Ag2Te–FeTe2–F1.12Te–Ag2Te and Ag8GeTe6–GeTe–FeTe2–AgFeTe2–Ag8GeTe6 of the Fe–Ag–Ge–Te system were established by the electromotive force (EMF) method. The positions of 3- and 4-phase regions relative to the composition of silver were applied to express the potential reactions involving the AgFeTe2, Ag2FeTe2, and Ag2FeGeTe4 compounds. The equilibrium synthesis of the set of phases was performed inside positive electrodes (PE) of the electrochemical cells: (−)Graphite ‖LE‖ Fast Ag+ conducting solid-electrolyte ‖R[Ag+]‖PE‖ Graphite(+), where LE is the left (negative) electrode, and R[Ag+] is the buffer region for the diffusion of Ag+ ions into the PE. From the observed results, thermodynamic quantities of AgFeTe2, Ag2FeTe2, and Ag2FeGeTe4 were experimentally determined for the first time. The reliability of the division of the Ag2Te–FeTe2–F1.12Te–Ag2Te and Ag8GeTe6–GeTe–FeTe2–AgFeTe2–Ag8GeTe6 phase regions was confirmed by the calculated thermodynamic quantities of AgFeTe2, Ag2FeTe2, and Ag2FeGeTe4 in equilibrium with phases in the adjacent phase regions. Particularly, the calculated Gibbs energies of Ag2FeGeTe4 in two different adjacent 4-phase regions are consistent, which also indicates that it has stoichiometric composition.

Determination of standard gibbs energies of formation of MgO, SrO, and BaO

1993 ◽  
Vol 24 (3) ◽  
pp. 487-492 ◽  
Author(s):  
Hideki Ono ◽  
Masaya Nakahata ◽  
Fumitaka Tsukihashi ◽  
Nobuo Sano
Keyword(s):  
Gibbs Energies

Fundamentals of Electrochemistry

2021 ◽  
pp. 389-411
Author(s):  
Christopher O. Oriakhi
Keyword(s):  
Free Energy ◽  
Equilibrium Constant ◽  
Electrode Potential ◽  
Electrolytic Cell ◽  
Electrochemical Cells ◽  
Standard Electrode Potential ◽  
Cell Potential ◽  
Oxidation Reduction ◽  
Constant Determination

Fundamentals of Electrochemistry build on basic oxidation-reduction reactions and present an overview of their use in electrochemical cells. The construction and operation of a galvanic cell is described with cell diagrams including the function of the electrodes (cathode and anode). Also covered are the standard electrode potential and its applications, including calculations involving the standard electrode potential, the Gibbs free energy and the equilibrium constant, determination of the spontaneity in redox reactions and the dependence of cell potential on concentration (the Nernst equation). Finally a qualitative and quantitative overview of electrolysis is presented with a focus on predicting the products of electrolysis and the stoichiometry of electrolysis, which relates the charge flowing through an electrolytic cell to the amount of products formed at the electrodes.

Determination of standard gibbs energies of formation of Cr2N and CrN

2001 ◽  
Vol 32 (6) ◽  
pp. 1113-1118 ◽  
Author(s):  
Hideki Ono-Nakazato ◽  
Kenji Taguchi ◽  
Tateo Usui ◽  
Keishi Tamura ◽  
Yuuji Tomatsu
Keyword(s):  
Gibbs Energies
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