Identifying the rate-determining step (RDS) for oxygen incorporation into mixed ionic and electronic conducting electrodes is very challenging, particularly since the local composition changes during the reaction. Now, a generally applicable method for identifying the RDS is presented, with the example of a Pr0.1Ce0.9O2–x electrode.
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Wachtel, E., Lubomirsky, I. Pathway for electrochemical O2 incorporation. Nat Catal 3, 94–95 (2020). https://doi.org/10.1038/s41929-020-0426-0
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DOI: https://doi.org/10.1038/s41929-020-0426-0
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