Figure 5. Accumulation effect of MV+ on a gold electrode. Left: Cyclic voltammogram; right: spectra. Five times in a row. The arrow indicates the increase of the scan.

From

Spectroelectrochemistry of Electrochromic and Electroluminescent Substances with Screen-Printed Electrodes and with an Optically Transparent Platinum Mesh Electrode

Achim Habekost

World Journal of Chemical Education. 2020, 8(2), 71-86 doi:10.12691/wjce-8-2-3