The Experts below are selected from a list of 255 Experts worldwide ranked by ideXlab platform
Isamu Yasuda - One of the best experts on this subject based on the ideXlab platform.
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Relationship between the steady-state polarization of the SOFC air electrode, La0.6Sr0.4MnO3+δ/YSZ, and its complex impedance measured at the Equilibrium Potential
Solid State Ionics, 1999Co-Authors: Yoshio Matsuzaki, Isamu YasudaAbstract:Abstract By making clear the relationship between the cathodic limiting current density and R -type Warburg impedance used in the Randles type equivalent circuit, the limiting current density, as well as the exchange current density, of a porous La 0.6 Sr 0.4 MnO 3+ δ /YSZ electrode has been successfully estimated from a complex impedance spectrum measured at an Equilibrium Potential. A steady-state polarization calculated from these current densities gave a good agreement with the measured one, which indicates that, even at an Equilibrium Potential, the limiting current density can be obtained with high precision from the complex impedance. Investigation of the exchange and limiting current densities of the electrode under an oxygen partial pressure, P O 2 , of 0.001–1 atm at 1123–1273 K has derived the formulation for expressing an equation which expresses the P O 2 and temperature dependence of steady-state polarization.
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relationship between the steady state polarization of the sofc air electrode la0 6sr0 4mno3 δ ysz and its complex impedance measured at the Equilibrium Potential
Solid State Ionics, 1999Co-Authors: Yoshio Matsuzaki, Isamu YasudaAbstract:Abstract By making clear the relationship between the cathodic limiting current density and R -type Warburg impedance used in the Randles type equivalent circuit, the limiting current density, as well as the exchange current density, of a porous La 0.6 Sr 0.4 MnO 3+ δ /YSZ electrode has been successfully estimated from a complex impedance spectrum measured at an Equilibrium Potential. A steady-state polarization calculated from these current densities gave a good agreement with the measured one, which indicates that, even at an Equilibrium Potential, the limiting current density can be obtained with high precision from the complex impedance. Investigation of the exchange and limiting current densities of the electrode under an oxygen partial pressure, P O 2 , of 0.001–1 atm at 1123–1273 K has derived the formulation for expressing an equation which expresses the P O 2 and temperature dependence of steady-state polarization.
Yoshio Matsuzaki - One of the best experts on this subject based on the ideXlab platform.
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Relationship between the steady-state polarization of the SOFC air electrode, La0.6Sr0.4MnO3+δ/YSZ, and its complex impedance measured at the Equilibrium Potential
Solid State Ionics, 1999Co-Authors: Yoshio Matsuzaki, Isamu YasudaAbstract:Abstract By making clear the relationship between the cathodic limiting current density and R -type Warburg impedance used in the Randles type equivalent circuit, the limiting current density, as well as the exchange current density, of a porous La 0.6 Sr 0.4 MnO 3+ δ /YSZ electrode has been successfully estimated from a complex impedance spectrum measured at an Equilibrium Potential. A steady-state polarization calculated from these current densities gave a good agreement with the measured one, which indicates that, even at an Equilibrium Potential, the limiting current density can be obtained with high precision from the complex impedance. Investigation of the exchange and limiting current densities of the electrode under an oxygen partial pressure, P O 2 , of 0.001–1 atm at 1123–1273 K has derived the formulation for expressing an equation which expresses the P O 2 and temperature dependence of steady-state polarization.
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relationship between the steady state polarization of the sofc air electrode la0 6sr0 4mno3 δ ysz and its complex impedance measured at the Equilibrium Potential
Solid State Ionics, 1999Co-Authors: Yoshio Matsuzaki, Isamu YasudaAbstract:Abstract By making clear the relationship between the cathodic limiting current density and R -type Warburg impedance used in the Randles type equivalent circuit, the limiting current density, as well as the exchange current density, of a porous La 0.6 Sr 0.4 MnO 3+ δ /YSZ electrode has been successfully estimated from a complex impedance spectrum measured at an Equilibrium Potential. A steady-state polarization calculated from these current densities gave a good agreement with the measured one, which indicates that, even at an Equilibrium Potential, the limiting current density can be obtained with high precision from the complex impedance. Investigation of the exchange and limiting current densities of the electrode under an oxygen partial pressure, P O 2 , of 0.001–1 atm at 1123–1273 K has derived the formulation for expressing an equation which expresses the P O 2 and temperature dependence of steady-state polarization.
David G. Goodwin - One of the best experts on this subject based on the ideXlab platform.
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the influence of Equilibrium Potential on the hydrogen oxidation kinetics of sofc anodes
Solid State Ionics, 2007Co-Authors: Wolfgang G. Bessler, Jürgen Warnatz, David G. GoodwinAbstract:Fundamental electrochemical relations predict that the kinetic properties of an electrochemical charge-transfer reaction depend on reactant and product concentrations due to electrical Equilibrium-Potential (Nernst Potential) effects. This paper discusses the consequences for the interpretation of observed reaction rates and orders of the electrochemical hydrogen oxidation at solid oxide fuel cell (SOFC) Ni/YSZ anodes. A thermodynamic model of the three-phase boundary is developed that describes the coupling of electroactive intermediates with global gas-phase reactants and products. The model is used to study the behavior of various reaction pathways proposed before, including hydrogen spillover, oxygen spillover, and interstitial hydrogen transfer. The results are compared with literature experimental data. The well-established activating effect of water on the SOFC anode kinetics can be explained by Equilibrium-Potential effects alone, without the necessity of assuming any additional kinetic or catalytic effect.
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The influence of Equilibrium Potential on the hydrogen oxidation kinetics of SOFC anodes
Solid State Ionics, 2007Co-Authors: Wolfgang G. Bessler, David G. Goodwin, Jürgen WarnatzAbstract:Fundamental electrochemical relations predict that the kinetic properties of an electrochemical charge-transfer reaction depend on reactant and product concentrations due to electrical Equilibrium-Potential (Nernst Potential) effects. This paper discusses the consequences for the interpretation of observed reaction rates and orders of the electrochemical hydrogen oxidation at solid oxide fuel cell (SOFC) Ni/YSZ anodes. A thermodynamic model of the three-phase boundary is developed that describes the coupling of electroactive intermediates with global gas-phase reactants and products. The model is used to study the behavior of various reaction pathways proposed before, including hydrogen spillover, oxygen spillover, and interstitial hydrogen transfer. The results are compared with literature experimental data. The well-established activating effect of water on the SOFC anode kinetics can be explained by Equilibrium-Potential effects alone, without the necessity of assuming any additional kinetic or catalytic effect. © 2006 Elsevier B.V. All rights reserved.
Jürgen Warnatz - One of the best experts on this subject based on the ideXlab platform.
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the influence of Equilibrium Potential on the hydrogen oxidation kinetics of sofc anodes
Solid State Ionics, 2007Co-Authors: Wolfgang G. Bessler, Jürgen Warnatz, David G. GoodwinAbstract:Fundamental electrochemical relations predict that the kinetic properties of an electrochemical charge-transfer reaction depend on reactant and product concentrations due to electrical Equilibrium-Potential (Nernst Potential) effects. This paper discusses the consequences for the interpretation of observed reaction rates and orders of the electrochemical hydrogen oxidation at solid oxide fuel cell (SOFC) Ni/YSZ anodes. A thermodynamic model of the three-phase boundary is developed that describes the coupling of electroactive intermediates with global gas-phase reactants and products. The model is used to study the behavior of various reaction pathways proposed before, including hydrogen spillover, oxygen spillover, and interstitial hydrogen transfer. The results are compared with literature experimental data. The well-established activating effect of water on the SOFC anode kinetics can be explained by Equilibrium-Potential effects alone, without the necessity of assuming any additional kinetic or catalytic effect.
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The influence of Equilibrium Potential on the hydrogen oxidation kinetics of SOFC anodes
Solid State Ionics, 2007Co-Authors: Wolfgang G. Bessler, David G. Goodwin, Jürgen WarnatzAbstract:Fundamental electrochemical relations predict that the kinetic properties of an electrochemical charge-transfer reaction depend on reactant and product concentrations due to electrical Equilibrium-Potential (Nernst Potential) effects. This paper discusses the consequences for the interpretation of observed reaction rates and orders of the electrochemical hydrogen oxidation at solid oxide fuel cell (SOFC) Ni/YSZ anodes. A thermodynamic model of the three-phase boundary is developed that describes the coupling of electroactive intermediates with global gas-phase reactants and products. The model is used to study the behavior of various reaction pathways proposed before, including hydrogen spillover, oxygen spillover, and interstitial hydrogen transfer. The results are compared with literature experimental data. The well-established activating effect of water on the SOFC anode kinetics can be explained by Equilibrium-Potential effects alone, without the necessity of assuming any additional kinetic or catalytic effect. © 2006 Elsevier B.V. All rights reserved.
Wolfgang G. Bessler - One of the best experts on this subject based on the ideXlab platform.
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the influence of Equilibrium Potential on the hydrogen oxidation kinetics of sofc anodes
Solid State Ionics, 2007Co-Authors: Wolfgang G. Bessler, Jürgen Warnatz, David G. GoodwinAbstract:Fundamental electrochemical relations predict that the kinetic properties of an electrochemical charge-transfer reaction depend on reactant and product concentrations due to electrical Equilibrium-Potential (Nernst Potential) effects. This paper discusses the consequences for the interpretation of observed reaction rates and orders of the electrochemical hydrogen oxidation at solid oxide fuel cell (SOFC) Ni/YSZ anodes. A thermodynamic model of the three-phase boundary is developed that describes the coupling of electroactive intermediates with global gas-phase reactants and products. The model is used to study the behavior of various reaction pathways proposed before, including hydrogen spillover, oxygen spillover, and interstitial hydrogen transfer. The results are compared with literature experimental data. The well-established activating effect of water on the SOFC anode kinetics can be explained by Equilibrium-Potential effects alone, without the necessity of assuming any additional kinetic or catalytic effect.
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The influence of Equilibrium Potential on the hydrogen oxidation kinetics of SOFC anodes
Solid State Ionics, 2007Co-Authors: Wolfgang G. Bessler, David G. Goodwin, Jürgen WarnatzAbstract:Fundamental electrochemical relations predict that the kinetic properties of an electrochemical charge-transfer reaction depend on reactant and product concentrations due to electrical Equilibrium-Potential (Nernst Potential) effects. This paper discusses the consequences for the interpretation of observed reaction rates and orders of the electrochemical hydrogen oxidation at solid oxide fuel cell (SOFC) Ni/YSZ anodes. A thermodynamic model of the three-phase boundary is developed that describes the coupling of electroactive intermediates with global gas-phase reactants and products. The model is used to study the behavior of various reaction pathways proposed before, including hydrogen spillover, oxygen spillover, and interstitial hydrogen transfer. The results are compared with literature experimental data. The well-established activating effect of water on the SOFC anode kinetics can be explained by Equilibrium-Potential effects alone, without the necessity of assuming any additional kinetic or catalytic effect. © 2006 Elsevier B.V. All rights reserved.