We are trying to investigate kinetics of CO and H2 electrochemical oxidation on ceria at 800 degreeC. Assuming elementary reactions;
CO_(g) + []_ce :::::::> CO_ce
H2_(g) + []_ce ::::::> H2_ce
H2O_ce :::::::> H2O_(g) + []_ce
CO2_ce :::::::> CO2_(g) + []_ce
where []_ce & *_ce refer free sites available and adsorbed molecule on ceria surface respectively.
Unfortunately thermodynamics of adsorbed species on ceria surface is not easy accessible in literature. I could only find the bond energy between adsorbed molecule on ceria (for various orientations like 111, 100 etc). Is there anybody who can help, how to calculate/measure
1) thermodynamic properties (enthalpy & entropy) of adsorbed molecules
2) Activation energy and pre-exponent factors to calculate rate constant for forward reactions
Best Regards
@Yurii Ceria based electrocatalysts are becoming more and more popular in SOFC applications, especially for hydrocarbon fuels because of their better resistance to carbon deposition. As SOFC operates between 700-850 degreeC so, to understand the electrochemistry of fuel oxidation on these electrodes, they must be studied at their operating conditions. That's why, we are trying to proceed with that.
Thanks! I would look the literature on heterogeneous catalytic oxidation by dioxygen at high temperature. This is a very mature area. This review might be useful
Catalytic properties of ceria and CeO2-containing materials
By:Trovarelli, A (Trovarelli, A)
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING
Volume: 38 Issue: 4 Pages: 439-520
DOI: 10.1080/01614949608006464
Published: 1996
Thank you very much for sharing this extensive review, I hope it will help. I would appreciate if you figured out any literature at high temperature and shared here. Thank you
Entropy: A concept that is not a physical quantity
https://www.researchgate.net/publication/230554936_Entropy_A_concept_that_is_not_a_physical_quantity
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