Imperial College London
Emeritus Professor Colin Atkinson

Emeritus ProfessorColinAtkinson

Faculty of Natural Sciences, Department of Mathematics

Emeritus Professor
 
 
 
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Contact

 

+44 (0)20 7594 8497c.atkinson

 
 
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Location

 

671Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Akbay:2019:10.1021/acs.jpcc.8b10823,
author = {Akbay, T and Kilner, JA and Ishihara, T and Atkinson, C},
doi = {10.1021/acs.jpcc.8b10823},
journal = {The Journal of Physical Chemistry C},
pages = {258--264},
title = {Explicit solution to extract self-diffusion and surface exchange coefficients from isotope back-exchange experiments},
url = {http://dx.doi.org/10.1021/acs.jpcc.8b10823},
volume = {123},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Multistep 18O isotope exchange procedures and subsequent analytical techniques can be used to elucidate the effect of ambient gas atmospheres on the transport properties of oxide ion-conducting materials utilized in high-temperature solid oxide devices for electrochemical energy conversion. In this contribution, we provide an explicit solution to the one-dimensional transient diffusion equation to estimate oxygen self-diffusion and surface exchange coefficients of oxide ion conducting materials exposed to multistep 18O exchange procedures. Although an analytical solution exists for representing the diffusion profiles of labeled species obtained from a single-step isotope exchange procedure, it is not applicable to the diffusion profiles resulted from consecutive procedures with dynamically altered initial and surface boundary conditions. Hence, a new analytical solution is found for the diffusion problem representing the isotope back-exchange procedure in a semi-infinite spatial domain. The explicit solution is then used to determine the self-diffusion and surface exchange coefficients as fitting parameters for tracer gas diffusion profiles obtained from multistep isotope exchange experiments conducted in different oxidizing gas atmospheres. It is demonstrated that the explicit solution provides a great flexibility in analyzing the effects of oxidizing gas atmospheres on transport properties of oxide ion conducting materials.
AU  - Akbay,T
AU  - Kilner,JA
AU  - Ishihara,T
AU  - Atkinson,C
DO  - 10.1021/acs.jpcc.8b10823
EP  - 264
PY  - 2019///
SN  - 1932-7447
SP  - 258
TI  - Explicit solution to extract self-diffusion and surface exchange coefficients from isotope back-exchange experiments
T2  - The Journal of Physical Chemistry C
UR  - http://dx.doi.org/10.1021/acs.jpcc.8b10823
UR  - http://hdl.handle.net/10044/1/65461
VL  - 123
ER  -
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