An electrochemical cell for 2-dimensional surface optical reflectance during anodization and cyclic voltammetry
Weronica Linpé, Gary S. Harlow, Alfred Larsson, Giuseppe Abbondanza, Lisa Rämisch, Sebastian Pfaff, Johan Zetterberg, Jonas Evertsson, Edvin Lundgren
Abstract
We have developed an electrochemical cell for in situ 2-Dimensional Surface Optical Reflectance (2D-SOR) studies during anodization and cyclic voltammetry. The 2D-SOR signal was recorded from electrodes made of polycrystalline Al, Au(111), and Pt(100) single crystals. The changes can be followed at a video rate acquisition frequency of 200 Hz and demonstrate a strong contrast between oxidizing and reducing conditions. Good correlation between the 2D-SOR signal and the anodization conditions or the cyclic voltammetry current is also observed. The power of this approach is discussed, with a focus on applications in various fields of electrochemistry. The combination of 2D-SOR with other techniques, as well as its spatial resolution and sensitivity, has also been discussed.