+ Site Statistics
References:
52,654,530
Abstracts:
29,560,856
PMIDs:
28,072,755
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn

+ Translate
+ Recently Requested

Application of a contact mode AFM for spatially resolved electrochemical impedance spectroscopy measurements of a Nafion membrane electrode assembly



Application of a contact mode AFM for spatially resolved electrochemical impedance spectroscopy measurements of a Nafion membrane electrode assembly



Physical Chemistry Chemical Physics 15(5): 1408-1416



A Nafion fuel cell membrane is investigated by means of electrochemical atomic force microscopy in different gas atmospheres. From chronoamperometric experiments with a point contact electrode spatially resolved electrochemical impedance spectra are obtained from which information about electrode processes and proton transport in the membrane is derived. In the first part the oxygen reduction reaction is investigated. Due to the absence of diffusion limitation, which is partly a result of the small electrode size, a low frequency inductive loop is observed, which is normally masked in macroscopic electrochemical impedance spectra. The influence of water formation from the oxygen reduction reaction at the cathode is discussed. The second part focuses on a hydrogen/oxygen fuel cell setup. A qualitative explanation is given for the necessity of an applied voltage in addition to the electrochemical potential. Electrochemical impedance spectra obtained at two different positions are compared and fitted based on a Randles-like equivalent circuit. A strongly inhomogeneous performance is observed which is attributed to the properties of the Nafion membrane. The electrolyte resistance and the Nernst impedance are restrictive parameters which describe the diffusion through the membrane.

(PDF emailed within 0-6 h: $19.90)

Accession: 051607183

Download citation: RISBibTeXText

PMID: 23080435

DOI: 10.1039/c2cp42843a



Related references

Electrochemical Impedance Spectroscopy of Ion-Selective Membranes: Artifacts in Two-, Three-, and Four-Electrode Measurements. Analytical Chemistry 88(19): 9738-9745, 2016

Electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy study of the response mechanism of the chalcogenide glass membrane iron(III) ion-selective electrode in saline media. Analytical Chemistry 72(4): 669-679, 2000

Characterisation by electrochemical impedance spectroscopy of a pet membrane electrode based on zeolithe. Research on Chemical Intermediates 41(5): 3261-3273, 2015

Study of the Adsorption of Glutathione on a Gold Electrode by Using Electrochemical Quartz Crystal Impedance, Electrochemical Impedance Spectroscopy, and Cyclic Voltammetry. Journal of Colloid and Interface Science 229(1): 12-20, 2000

Analyses of interfacial resistances in a membrane-electrode assembly for a proton exchange membrane fuel cell using symmetrical impedance spectroscopy. Physical Chemistry Chemical Physics 12(46): 15291-15300, 2010

Two-Point Stretchable Electrode Array for Endoluminal Electrochemical Impedance Spectroscopy Measurements of Lipid-Laden Atherosclerotic Plaques. Annals of Biomedical Engineering 44(9): 2695-2706, 2017

Interaction study of paraquat and silver electrode using electrochemical impedance spectroscopy: Application in milk and tomato samples. Food Control 47: 679-685, 2015

Electrochemical impedance spectroscopy study on polymerization of L-lysine on electrode surface and its application for immobilization and detection of suspension cells. Analytical Chemistry 86(14): 6940-6947, 2015

Spatially resolved blood oxygenation measurements using time-resolved photoacoustic spectroscopy. Advances in Experimental Medicine and Biology 578: 155-160, 2006

Electrochemical impedance spectroscopy for real-time detection of lipid membrane damage based on a porous self-assembly monolayer support. Analytical Chemistry: -, 2018

Electrochemical impedance spectroscopy study of a hydrogen electrode reaction at a Zn electrode in a molten LiCl-KCl-LiH system. Journal of Physical Chemistry. B 109(19): 9645-9650, 2006

Development of stable and reproducible biosensors based on electrochemical impedance spectroscopy: three-electrode versus two-electrode setup. Biosensors & Bioelectronics 55: 1-6, 2014

Characterization of carbon nanofiber electrode arrays using electrochemical impedance spectroscopy: effect of scaling down electrode size. Acs Nano 4(2): 955-961, 2010

A comparison of spatially resolved spectroscopy and stimulated echo acquisition mode sequences for volume-localized spectroscopy. Journal of Magnetic Resonance 80(1): 23-38, 1969

Anomalous Localization of Electrochemical Activity in Reversible Charge Transfer at a Weierstrass Fractal Electrode: Local Electrochemical Impedance Spectroscopy. Journal of Physical Chemistry. B 119(34): 10876-10887, 2015