Kinetics of Hydrogen Oxidation in Molten Carbonate: Application of Computer Curve‐Fitting Technique

Lu, S. H.; Selman, J. R.

doi:10.1149/1.2096786

Cited by 13 publications

(12 citation statements)

References 23 publications

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“…(i) reaction steps [4a]-[4c] are consecutive, (ii) the ratedetermining step is [4b], (iii) hydrogen is weakly adsorbed, at low coverage, in the form of MH following the Langmuir isotherm. According to this mechanism and dependence of exchange current density on gas composition should be io = i~ (H2)~176 ~ [5] The agreement between measured and theoretical exponents appears to be fairly good. However, the role of the reaction intermediate, OH-, in this mechanism warrants further consideration; since this species is stable in the melt, the quasi-steady-state condition may not hold as assumed in the derivation of Eq.…”

Section: Mn § (Rds) [4b] Mh + Oh-= H20 + M + E-[4c]mentioning

confidence: 64%

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Hydrogen Oxidation in Molten Carbonate: Mechanistic Analysis of Potential Sweep Data

Selman

1989

J. Electrochem. Soc.

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The hydrogen oxidation reaction on copper in molten carbonate was studied using the potential sweep technique. The experimental results show that no reactants or products are strongly adsorbed on the electrode surface; however, the voltammograms do suggest a weak adsorption of hydrogen. The role of OH-ions as a reaction intermediate is discussed and its effect on the determination of kinetic parameters is considered.

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Section: Mn § (Rds) [4b] Mh + Oh-= H20 + M + E-[4c]mentioning

confidence: 64%

“…However, the role of the reaction intermediate, OH-, in this mechanism warrants further consideration; since this species is stable in the melt, the quasi-steady-state condition may not hold as assumed in the derivation of Eq. [5].…”

Section: Mn § (Rds) [4b] Mh + Oh-= H20 + M + E-[4c]mentioning

confidence: 99%

Hydrogen Oxidation in Molten Carbonate: Mechanistic Analysis of Potential Sweep Data

Selman

1989

J. Electrochem. Soc.

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“…With the assumption that a is large and that the electrodes effective conductivity κ, is much higher than the pore electrolyte conductivity (κ 2 ), one obtains dr\ di RT nFSi 0 K 2 (6) which is valid also for the anode under the following conditions:…”

Section: Jl J_mentioning

confidence: 93%

Electrochemical Performance of the Porous Nickel Anode in the Molten Carbonate Fuel Cell

Lindbergh¹,

Sparr²

2001

High Temperature Materials and Processes

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In this study, stationary polarisation curves were obtained for a porous nickel electrode under varying temperatures and anode gas compositions. The exchange current densities were determined from the slopes of the polarisation curves at low overpotentials, i.e. the assumption was made that the porous electrode is under kinetic control. The outlet gas compositions were measured by analysis in a gas Chromatograph. The gases were found to be far from equilibrium. However, almost the same reaction orders were found independently of the assumptions of gas compositions but they were rather high and therefore difficult to explain by the generally assumed mechanisms.

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“…10 For this mechanism p 1,a ,p 2,a , and q 1,a ,q 2,a have values of 0, 1/2, and 1, Ϫ1/2, respectively. r 1,a , r 2,a and r 3,a have a value of 0.25 each.…”

Section: ͓14͔mentioning

confidence: 98%

Full Cell Mathematical Model of a MCFC

Subramanian

Haran

White

et al. 2003

J. Electrochem. Soc.

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A theoretical model for the molten carbonate fuel cell was developed based on the three-phase homogeneous approach. Using this model, the contribution of different cell components to losses in cell performance has been studied. In general, at low current densities, the electrolyte matrix contributed to the major fraction of potential losses. Mass transfer effects became important at high current densities and were more prominent at the cathode. Electrolyte conductivity and cathode exchange current density seemed to play a limiting role in determining cell performance. Using the model, the maximum power density from a single cell for different cell thicknesses was determined.

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Kinetics of Hydrogen Oxidation in Molten Carbonate: Application of Computer Curve‐Fitting Technique

Cited by 13 publications

References 23 publications

Hydrogen Oxidation in Molten Carbonate: Mechanistic Analysis of Potential Sweep Data

Hydrogen Oxidation in Molten Carbonate: Mechanistic Analysis of Potential Sweep Data

Electrochemical Performance of the Porous Nickel Anode in the Molten Carbonate Fuel Cell

Full Cell Mathematical Model of a MCFC

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