Manganese Oxides As Anode Catalysts for Electrolysis: In Situ Raman and Corrosion Studies
In order to understand the limitations of this catalyst under the operational conditions, it is important to study this material in situ. Setup for in situ Surface Enhanced Raman Spectroscopy is used for tracking the structural changes of hydrous MnOx. Electrodeposition of MnOx on the surface of Au was achieved by passing an anodic current of 50 mC/cm2 at 1,6V. Besides in-situ study of catalyst structure, ex situ analysis of corrosion using flow cells combined with Inductively Coupled Plasma-Optical Emission Spectroscopy and explicit oxygen detection using Rotating Ring Disc Electrode allows us to develop.
The structural integrity of the MnOx was studied by following the Mn-O-Mn stretching various potential ranges in various electrolytes. Onset of phase changes and corrosion could be clearly established. Beside this, other methods such as XRD, SEM, TEM were applied to study these thin films.