Time-resolved X-ray absorption spectroelectrochemistry of redox active species in solution

We describe here the development and operation of a new spectroelectrochemical transmission cell for time-resolved X-ray absorption spectroscopy of solutions. X-ray absorption spectra were recorded on the ROCK beamline of SOLEIL under constant and scanning potentials. Spectra were recorded at a frequency of 2   Hz during a cyclic voltammetry experiment performed on a 20   mM solution of FeIIICl3 · 6H2O at 20   mV   s − 1 scanning speed. Spectra with good signal-to-noise ratios were obtained when averaging ten spectra over 5   s, corresponding to a 100   mV potential range. A 90% conversion rate from Fe(III) to Fe(II) was spectroscopically demonstrated in cyclic voltammetry mode.

Source: Journal of Synchrotron Radiation - October 21, 2019 Category: Physics Authors: Cheaib, K. Maurice, B. Mateo, T. Halime, Z. Lassalle-Kaiser, B. Tags: time-resolved X-ray absorption spectroscopy cyclic voltammetry redox reactions research papers Source Type: research