Open AccessTime‐resolved X‐ray absorption spectroelectrochemistry of redox active species in solution
Author(s) -
Cheaib Khaled,
Maurice Baptiste,
Mateo Tiphaine,
Halime Zakaria,
Lassalle-Kaiser Benedikt
Publication year - 2019
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577519013614
Subject(s) - cyclic voltammetry , analytical chemistry (journal) , absorption spectroscopy , redox , spectral line , chemistry , absorption (acoustics) , electrochemistry , electrocatalyst , spectroscopy , voltammetry , horizontal scan rate , materials science , electrode , optics , inorganic chemistry , physics , chromatography , astronomy , composite material , quantum mechanics
Electrochemistry and electrocatalysis have been receiving increased attention recently due to their crucial contribution to electrical‐to‐chemical conversion systems. 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 m M solution of Fe III Cl 3 ·6H 2 O 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.