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dc.contributor.authorLee, W. Y.
dc.contributor.authorOng, K. M.
dc.contributor.authorGhoniem, A. F.
dc.date.accessioned2016-02-25T12:59:27Z
dc.date.available2016-02-25T12:59:27Z
dc.date.issued2015-07-17
dc.identifier.citationLee WY, Ong KM, Ghoniem AF (2015) Detailed H2 and CO Electrochemistry for a MEA Model Fueled by Syngas. ECS Transactions 68: 3059–3074. Available: http://dx.doi.org/10.1149/06801.3059ecst.
dc.identifier.issn1938-6737
dc.identifier.issn1938-5862
dc.identifier.doi10.1149/06801.3059ecst
dc.identifier.urihttp://hdl.handle.net/10754/597953
dc.description.abstract© The Electrochemical Society. SOFCs can directly oxidize CO in addition to H2, which allows them to be coupled to a gasifier. Many membrane-electrode-assembly (MEA) models neglect CO electrochemistry due to sluggish kinetics and the water-gas-shift reaction, but CO oxidation may be important for high CO-content syngas. The 1D-MEA model presented here incorporates detailed mechanisms for both H2 and CO oxidation, individually fitted to experimental data. These mechanisms are then combined into a single model, which provides a good fit to experimental data for H2/CO mixtures. Furthermore, the model fits H2/CO data best when a single chargetransfer step in the H2 mechanism is assumed to be rate-limiting for all current densities. This differs from the result for H2/H2O mixtures, where H2 adsorption becomes rate-limiting at high current densities. These results indicate that CO oxidation cannot be neglected in MEA models running on CO-rich syngas, and that CO oxidation can alter the H2 oxidation mechanism.
dc.description.sponsorshipThis work has been supported by the Samsung Scholarship Foundation and an awardfrom King Abdullah University of Science and Technology.
dc.publisherThe Electrochemical Society
dc.titleDetailed H2 and CO Electrochemistry for a MEA Model Fueled by Syngas
dc.typeConference Paper
dc.identifier.journalECS Transactions
dc.conference.date2015-07-26 to 2015-07-31
dc.conference.name14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
dc.conference.locationGlasgow, GBR
dc.contributor.institutionMassachusetts Institute of Technology, Cambridge, United States
dc.date.published-online2015-07-17
dc.date.published-print2015-07-17


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