Reversibility of Ferri-/Ferrocyanide Redox during Operando Soft X-ray Spectroscopy
Name
Risch_JPCC_2015-preprint.pdf
Size
906.53 KB
Format
Adobe PDF
Checksum (MD5)
e7ba2cd639b9f5bfbfed7a6de8fbe360
Author(s)
Regier, Tom Z.
Peak, Derek
Sayed, Sayed Youssef
Risch, Marcel
Stoerzinger, Kelsey Ann
Shao-Horn, Yang
Date Issued
July 2015
Journal
The Journal of Physical Chemistry C
Publisher
American Chemical Society (ACS)
Citation
Risch, Marcel, Kelsey A. Stoerzinger, Tom Z. Regier, Derek Peak, Sayed Youssef Sayed, and Yang Shao-Horn. “Reversibility of Ferri-/Ferrocyanide Redox During Operando Soft X-Ray Spectroscopy.” The Journal of Physical Chemistry C 119, no. 33 (August 20, 2015): 18903–18910.
Version
Author's final manuscript
Abstract
The ferri-/ferrocyanide redox couple is ubiquitous in many fields of physical chemistry. We studied its photochemical response to intense synchrotron radiation by in situ X-ray absorption spectroscopy (XAS). For photon flux densities equal to and above 2 × 1011 s–1 mm–2, precipitation of ferric (hydr)oxide from both ferricyanide and ferrocyanide solutions was clearly detectable, despite flowing fast enough to replace the solution in the flow cell every 0.4 s (flow rate 1.5 mL/min). During cyclic voltammetry, precipitation of ferric (hydr)oxide was promoted at reducing voltages and observed below 1011 s–1 mm–2. This was accompanied by inhibition of the ferri-/ferrocyanide redox, which we probed by time-resolved operando XAS. Our study highlights the importance of considering both electrochemical and spectroscopic conditions when designing in situ experiments.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1021/acs.jpcc.5b04609
