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Related Concept Videos

Voltammetric Techniques: Cyclic Voltammetry01:10

Voltammetric Techniques: Cyclic Voltammetry

480
Cyclic voltammetry (CV) is an electrochemical technique used to investigate the redox properties of a chemical species. It involves measuring the current response of an electrochemical cell as a function of the applied potential. The setup for cyclic voltammetry typically consists of a working electrode, a reference electrode, and a counter electrode—all immersed in an electrolyte solution. The working electrode is where the redox reaction of interest occurs, while the reference electrode...
480
Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

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Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
236
Voltammetric Techniques: Linear-Scan (E vs Time)01:12

Voltammetric Techniques: Linear-Scan (E vs Time)

403
Polarography is a classical voltammetric technique used to analyze electrochemical reactions. This method applies a linear potential sweep to a dropping mercury electrode (DME), and the resulting current is measured. A dropping mercury electrode is commonly used as the working electrode in polarography. It consists of a capillary tube filled with mercury, where the tiny droplet forms at the tip. This droplet continuously drops from the capillary, creating a new electrode surface for each...
403
Voltammetric Techniques: Pulse Voltammetry01:17

Voltammetric Techniques: Pulse Voltammetry

520
Differential-pulse voltammetry (DPV) is a type of voltammetry that involves applying a series of voltage pulses to an electrochemical cell while measuring the resulting current. In DPV, the differential pulse or small potential pulses are superimposed on a linear potential sweep. The magnitude of these pulses is typically small, often in the millivolt range. Each voltage pulse lasts a short duration, usually in the order of a few milliseconds, and is applied at regular intervals along the...
520
Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

251
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...
251

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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
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Cyclic Voltammetry for Accurate Icing Detection on Simulated Aircraft Surfaces.

Kate Yeadon1, Edward P C Lai1, Naiheng Song2

  • 1Department of Chemistry, Carleton University, Ottawa, Ontario K1S 5B6, Canada.

Langmuir : the ACS Journal of Surfaces and Colloids
|November 28, 2023
PubMed
Summary

Detecting aircraft icing is crucial for safety. This study introduces a novel electrochemical method using cyclic voltammetry to accurately identify the onset of ice formation on aircraft surfaces, improving active ice protection.

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Area of Science:

  • Aerospace Engineering
  • Materials Science
  • Electrochemistry

Background:

  • Aircraft icing poses significant safety risks due to increased drag and reduced lift.
  • Current active ice protection systems are energy-intensive and environmentally unfriendly.
  • Effective passive icephobic coatings for aerospace applications remain a challenge.

Purpose of the Study:

  • To develop a rapid and accurate method for detecting the initiation of icing on aircraft surfaces.
  • To explore the use of cyclic voltammetry for real-time icing detection.
  • To assess the method's efficacy on surfaces with and without icephobic coatings.

Main Methods:

  • Utilized cyclic voltammetry to monitor electrochemical signals of a water droplet on a simulated aircraft surface as it froze.
  • Employed a screen-printed electrode in contact with the water droplet and surface.
  • Collected voltammograms during controlled temperature decrease to pinpoint the phase transition.

Main Results:

  • A distinct sharp spike in faradaic current was observed during the water-to-ice phase transition.
  • This electrochemical signal change indicates a shift in mass transfer mechanisms.
  • The method precisely identified the onset of icing, even on surfaces with icephobic coatings.

Conclusions:

  • Cyclic voltammetry offers a novel and precise electrochemical sensing approach for detecting aircraft icing initiation.
  • This method can enable timely activation of active ice protection systems, optimizing their use.
  • The developed technique holds potential for enhancing aviation safety by mitigating icing risks.