Stochasticity in single-entity electrochemistry

by Ren, Hang; Edwards, Martin A.

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Most electrochemical processes are stochastic and discrete in nature. Yet experimental observables, for example, i vs E, are typically smooth and deterministic, because of many events/processes, for example, electron transfers, being averaged together. However, when the number of entities measured approaches a few or even one, stochasticity frequently emerges. Yet all is not lost! Probabilistic and statistical interpretation can generate insights matching or superseding those from macroscale/ensemble measurements, revealing phenomena that were hitherto averaged over. Herein, we review recent literature examples of stochastic processes in single-entity electrochemistry, highlighting strategies for interpreting stochasticity, contrasting them with macroscale measurements and describing the insights generated.

Journal
Current Opinion in Electrochemistry
Volume
25
Year
2021
ISBN/ISSN
2451-9103
PMID
33102927
DOI
10.1016/j.coelec.2020.08.014