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. Author manuscript; available in PMC: 2019 Oct 1.
Published in final edited form as: Faraday Discuss. 2018 Oct 1;210(0):9–28. doi: 10.1039/c8fd00134k

Scheme 2.

Scheme 2.

The ErCi mechanism of Scheme 1 expressed in context of redox cycling, introduced in the 1965 Anderson-Reilley twin-electrode thin-layer cell.58, 59 Redox cycling results in current amplification and the amount of cycling depends on the rate of the following chemical rate, kchem, and the “gap” distance between the electrodes. Clearly, larger values of kchem (i.e., faster chemical reactions) can be measured when the gap distance is reduced.