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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
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Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...

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Related Experiment Video

Updated: May 18, 2026

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
15:08

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells

Published on: September 20, 2012

Probing and mapping electrode surfaces in solid oxide fuel cells.

Kevin S Blinn1, Xiaxi Li, Mingfei Liu

  • 1Center for Innovative Fuel Cells and Battery Technologies, School of Materials Science and Engineering, Georgia Institute of Technology, GA, USA.

Journal of Visualized Experiments : Jove
|October 2, 2012
PubMed
Summary
This summary is machine-generated.

This study advances in situ analysis for solid oxide fuel cells (SOFCs) by combining Raman spectroscopy and scanning probe microscopy. These techniques reveal degradation mechanisms like sulfur poisoning and coking on SOFC anodes, crucial for improving fuel cell efficiency.

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Last Updated: May 18, 2026

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
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Probing Surface Electrochemical Activity of Nanomaterials using a Hybrid Atomic Force Microscope-Scanning Electrochemical Microscope (AFM-SECM)
08:31

Probing Surface Electrochemical Activity of Nanomaterials using a Hybrid Atomic Force Microscope-Scanning Electrochemical Microscope (AFM-SECM)

Published on: February 10, 2021

Area of Science:

  • Electrochemistry and Materials Science
  • Energy Conversion and Storage Technologies

Background:

  • Solid oxide fuel cells (SOFCs) offer efficient fuel utilization but are limited by electrode surface and interface charge/mass transfer.
  • Lack of in situ mechanistic understanding hinders SOFC commercialization, necessitating advanced characterization tools.
  • Raman spectroscopy and scanning probe microscopy (SPM) are valuable for in situ surface analysis under operating conditions.

Purpose of the Study:

  • To develop and demonstrate in situ surface analysis capabilities for SOFC electrodes.
  • To investigate degradation mechanisms such as sulfur poisoning and carbon deposition (coking) in SOFC anodes.
  • To correlate electrochemical performance with surface chemistry using advanced characterization techniques.

Main Methods:

  • Utilized a novel test electrode platform with a Ni mesh electrode in a yttria-stabilized zirconia (YSZ) electrolyte.
  • Performed electrochemical measurements, including impedance spectroscopy, under H2S-containing fuel.
  • Employed in situ Raman spectroscopy/mapping for sulfur poisoning and coking analysis, complemented by Atomic Force Microscopy (AFM) and Electrostatic Force Microscopy (EFM) for nanoscale visualization.

Main Results:

  • Successfully characterized cell performance and impedance spectroscopy under sulfur poisoning conditions.
  • Elucidated the nature of sulfur poisoning and investigated coking behavior using in situ Raman monitoring.
  • Visualized carbon deposition on the nanoscale using AFM and EFM, providing detailed insights into degradation.

Conclusions:

  • The combined use of electrochemical methods, Raman spectroscopy, and SPM provides a powerful approach to understand SOFC anode degradation mechanisms.
  • This research significantly advances the capability for in situ surface analysis, paving the way for rational design of improved SOFC electrode materials.
  • A more complete picture of SOFC anode behavior under realistic operating conditions, including degradation pathways, has been established.