Electrochemical Determination of Gibbs Energy of Formation of <scp><scp>LaCrO</scp></scp><sub>3</sub> Using a Composition‐Graded Bielectrolyte

Jacob, Κ. T.; Gupta, Sapna; Singh, Prabhakar P.

doi:10.1111/jace.12435

Cited by 13 publications

(13 citation statements)

References 36 publications

(131 reference statements)

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“…The enthalpy of oxidation of LaCrO 3 to LaCrO 4 at the average experimental temperature 930 K is −85.73 (±0.77) kJ/mol. Recently, the standard Gibbs energy of formation of LaCrO 3 from component oxides La 2 O 3 and Cr 2 O 3 has been determined in the temperature range 875–1175 K using a bielectrolyte solid‐state cell . For the reaction,

1 false/ 2 {La}_{2} {normalO}_{3} + 1 / 2 {Cr}_{2} {normalO}_{3} \to {LaCrO}_{3}

Δ G_{(6)}^{\circ} false(\pm 2270 false), J / mol = - 72329 + 4.932 false(T in Kelvin false)

…”

Section: Resultsmentioning

confidence: 99%

“…Using thermodynamic data for ternary oxides—results of this study on three oxides (LaCrO 4 , La 2 Cr 3 O 12 , and La 2 CrO 6 ) with Cr in higher valence state, and our recent study on LaCrO 3 subsolidus phase relations in the system La–Cr–O are computed at different temperatures using the Gibbs energy minimization procedure. The results are shown in Figs.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Thermodynamic Properties of LaCrO₄, La₂CrO₆, and La₂Cr₃O₁₂, and Subsolidus Phase Relations in the System Lanthanum–Chromium–Oxygen

2013

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1 false/ 2 {La}_{2} {normalO}_{3} + 1 / 2 {Cr}_{2} {normalO}_{3} \to {LaCrO}_{3}

Δ G_{(6)}^{\circ} false(\pm 2270 false), J / mol = - 72329 + 4.932 false(T in Kelvin false)

…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Thermodynamic Properties of LaCrO₄, La₂CrO₆, and La₂Cr₃O₁₂, and Subsolidus Phase Relations in the System Lanthanum–Chromium–Oxygen

2013

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“…2. Significant research over the last decade has resulted in the identification, selection, testing and optimization of several A and B site doped perovskites (electronic/ionic conductors) and doped zirconia (ionic conductor) for devices operating at ~1000°C [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: Otm Technology Within the Otm Boiler And The Otm Pox Units Imentioning

confidence: 99%

Performance and post-test characterization of an OTM system in an experimental coal gasifier

Gupta

Adams²,

Wilson³

et al. 2016

Applied Energy

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An early design of oxygen transport membranes (OTM) developed and fabricated by Praxair have been tested at 850-900°C in an experimental coal gasifier using a blend of Illinois and Powder River Basin (PRB) coals. Oxygen flux was measured and found to be stable over approximately 80 hours of gasifier operation. Study of interactions between the OTM and coal ash and gas phase impurities indicated that the OTM components remain chemically and structurally stable against coal ash and do not show any indication of solid or liquid (slagging) compound formation. The structure of the active fuel oxidation layer in the OTM exposed to the coal gas also remained stable and no interactions between the consecutive layers (porous support/fuel oxidation layer/gas separation layer/oxygen incorporation layer) were identified in the tested OTM system.

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“…[27][28][29][30][31][32] In this work, an adhesive and compact LaCrO 3 coating was prepared on a type 430 stainless steel substrate by electrodeposition of a La-Cr coating from a citrate bath and then by heat-treatment at 800…”

Section: D822mentioning

confidence: 99%

Preparation of La-Cr Perovskite Coating Using Electrodeposition Method

Zhang

You

Luo

et al. 2016

J. Electrochem. Soc.

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An adhesive LaCrO 3 perovskite coating has been prepared on stainless steel substrate by cathodic electrodeposition from aqueous solution 0.03 M La(CH 3 COO) 3 + 0.03 M CrCl 3 + 0.03 M Na 3 C 6 H 5 O 7 , followed by heat-treatment at 800 • C in air. The electrodeposition of La-Cr coatings has been examined in the solution with pH of 2∼3 at the current density of 1∼5 mA cm −2 . It is shown that the change of pH by even 0.1 can affect obviously the deposition of La-Cr coatings, and increasing the current density will lead to the generation of more cracks in the coatings. A more uniform and compact La-Cr coating can be obtained in the solution with the optimized pH value of 2.7 at the optimized current density of 1 mA cm −2 . The La and Cr deposits change from their metallic states to the hydroxides during electrodeposition, corresponding to the increase in the pH with time. The as-prepared La-Cr coating is rich in La, due to the strong coordination of trivalent chromium with complex agent in the bath. The outward diffusion of Cr from the stainless steel substrate supplies the as-prepared La-rich coating to form LaCrO 3 during heat-treatment. which are capital intensive and difficult for scale production. Electrodeposition of Ln-M coatings from aqueous solutions followed by heat-treatment is an advantageous method for preparing perovskite coatings. [11][12][13][14][15] This method offers a more economical and efficient technique for the fabrication of perovskite coatings. Nevertheless, although the Ln-M coatings have been successful prepared using both anodic and cathodic electrodeposition methods, relevant research is still limited and challenging.Matsumoto et al [11][12][13] conducted a series of research on the anodic electrodeposition of Ln-M (M = Co, Mn) coatings. Their studies indicated that Ln ions did not participate in any oxidation reactions. The incorporation of Ln ions into the M hydroxide/oxide coatings was achieved by enriching the bath with Ln ions and their consequent adsorption. This gives poor control over the Ln contents in the coatings and requires a high concentration of Ln ions for deposition. 15By comparison, cathodic electrodeposition is an inherently superior technique as both Ln and M ions participate in the reactions, leading to facile deposition of Ln and M elements. 14 However, the cathodic electrodeposition of Ln-M coatings still faces some problems. The main obstacle stems from the low equilibrium potentials of Ln ions. Since the equilibrium potentials of Ln ions (Ln 3+ + 3e -→Ln; E 0 = -2.52 ∼-2.25 V SHE ) are much more negative than that of water (2H 2 O + 4e -→2OH -+ H 2 ; E 0 = -0.828 V SHE ), electrolytic decomposition of water appears preferentially.16,17 Fortunately, electrodeposition of Ln elements can be achieved by adding some complex agents to shift their evolution potentials to more positive values. 18,19 Lokhande et al 20 investigated the electrodeposition of La from aqueous solutions on different substrates and found that sodium citrate was a suitable complex agent for L...

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Electrochemical Determination of Gibbs Energy of Formation of LaCrO₃ Using a Composition‐Graded Bielectrolyte

Cited by 13 publications

References 36 publications

Thermodynamic Properties of LaCrO₄, La₂CrO₆, and La₂Cr₃O₁₂, and Subsolidus Phase Relations in the System Lanthanum–Chromium–Oxygen

Thermodynamic Properties of LaCrO₄, La₂CrO₆, and La₂Cr₃O₁₂, and Subsolidus Phase Relations in the System Lanthanum–Chromium–Oxygen

Performance and post-test characterization of an OTM system in an experimental coal gasifier

Preparation of La-Cr Perovskite Coating Using Electrodeposition Method

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Electrochemical Determination of Gibbs Energy of Formation of LaCrO3 Using a Composition‐Graded Bielectrolyte

Cited by 13 publications

References 36 publications

Thermodynamic Properties of LaCrO4, La2CrO6, and La2Cr3O12, and Subsolidus Phase Relations in the System Lanthanum–Chromium–Oxygen

Thermodynamic Properties of LaCrO4, La2CrO6, and La2Cr3O12, and Subsolidus Phase Relations in the System Lanthanum–Chromium–Oxygen

Performance and post-test characterization of an OTM system in an experimental coal gasifier

Preparation of La-Cr Perovskite Coating Using Electrodeposition Method

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Product

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Electrochemical Determination of Gibbs Energy of Formation of LaCrO₃ Using a Composition‐Graded Bielectrolyte

Thermodynamic Properties of LaCrO₄, La₂CrO₆, and La₂Cr₃O₁₂, and Subsolidus Phase Relations in the System Lanthanum–Chromium–Oxygen

Thermodynamic Properties of LaCrO₄, La₂CrO₆, and La₂Cr₃O₁₂, and Subsolidus Phase Relations in the System Lanthanum–Chromium–Oxygen