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Gastight Hydrodynamic Electrochemistry: Design for a Hermetically Sealed Rotating Disk Electrode Cell

Jung, Suho and Kortlever, Ruud and Jones, Ryan J. R. and Lichterman, Michael F. and Agapie, Theodor and McCrory, Charles C. L. and Peters, Jonas C. (2017) Gastight Hydrodynamic Electrochemistry: Design for a Hermetically Sealed Rotating Disk Electrode Cell. Analytical Chemistry, 89 (1). pp. 581-585. ISSN 0003-2700. https://resolver.caltech.edu/CaltechAUTHORS:20161209-102641774

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Abstract

Rotating disk electrodes (RDEs) are widely used in electrochemical characterization to analyze the mechanisms of various electrocatalytic reactions. RDE experiments often make use of or require collection and quantification of gaseous products. The combination of rotating parts and gaseous analytes makes the design of RDE cells that allow for headspace analysis challenging due to gas leaks at the interface of the cell body and the rotator. In this manuscript we describe a new, hermetically-sealed electrochemical cell that allows for electrode rotation while simultaneously providing a gastight environment. Electrode rotation in this new cell design is controlled by magnetically coupling the working electrode to a rotating magnetic driver. Calibration of the RDE using a tachometer shows that the rotation speed of the electrode is the same as that of the magnetic driver. To validate the performance of this cell for hydrodynamic measurements, limiting currents from the reduction of a potassium ferrocyanide (K_4[Fe(CN)_6] •3H_2O) were measured and shown to compare favorably with calculated values from the Levich equation and with data obtained using more typical, non-gastight RDE cells. Faradaic efficiencies of ~95% were measured in the gas phase for oxygen evolution in alkaline media at an Inconel 625 alloy electrocatalyst during rotation at 1600 rpm. These data verify that a gastight environment is maintained even during rotation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/acs.analchem.6b04228DOIArticle
http://pubs.acs.org/doi/abs/10.1021/acs.analchem.6b04228PublisherArticle
ORCID:
AuthorORCID
Jung, Suho0000-0002-8119-3902
Lichterman, Michael F.0000-0002-0710-7068
Agapie, Theodor0000-0002-9692-7614
McCrory, Charles C. L.0000-0001-9039-7192
Peters, Jonas C.0000-0002-6610-4414
Additional Information:© 2016 American Chemical Society. Received: October 28, 2016; Accepted: December 7, 2016; Published: December 7, 2016. This material is based upon work performed by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy under Award Number DE-SC0004993. The authors declare no competing financial interest.
Group:JCAP
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Issue or Number:1
Record Number:CaltechAUTHORS:20161209-102641774
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20161209-102641774
Official Citation:Gastight Hydrodynamic Electrochemistry: Design for a Hermetically Sealed Rotating Disk Electrode Cell Suho Jung, Ruud Kortlever, Ryan J. R. Jones, Michael F. Lichterman, Theodor Agapie, Charles C. L. McCrory, and Jonas C. Peters Analytical Chemistry 2017 89 (1), 581-585 DOI: 10.1021/acs.analchem.6b04228
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72691
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Dec 2016 19:39
Last Modified:03 Oct 2019 16:20

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