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Related Concept Videos

Voltammetric Techniques: Pulse Voltammetry01:17

Voltammetric Techniques: Pulse Voltammetry

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...
Voltammetric Techniques: Cyclic Voltammetry01:10

Voltammetric Techniques: Cyclic Voltammetry

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...
Voltammetry: Overview01:20

Voltammetry: Overview

Voltammetry is an electroanalytical technique in which the current flowing through an electrochemical cell is measured as a function of applied potential, typically under conditions of concentration polarization. The technique provides valuable information about redox-active species, and the current response is plotted as a voltammogram.
A voltammetric cell uses three electrodes: a working electrode, a reference electrode, and an auxiliary electrode. The redox reactions occur in the working...
Voltammetric Techniques: Linear-Scan (E vs Time)01:12

Voltammetric Techniques: Linear-Scan (E vs Time)

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...
Voltammetry: Factors Affecting Measurements01:21

Voltammetry: Factors Affecting Measurements

A current produced due to the redox reactions of the analyte at the working and auxiliary electrodes is called a faradaic current. The reaction can be divided into two types. The current generated due to the reduction of the analyte is called cathodic current, and it carries a positive charge. In contrast, the current produced by analyte oxidation is known as an anodic current, and it has a negative charge. The applied potential at the working electrode determines the faradaic current flow, and...
Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

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...

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Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes
08:32

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes

Published on: June 30, 2019

Snapshot voltammetry using a triangular bipolar microelectrode.

Byoung-Yong Chang1, François Mavré, Kwok-Fan Chow

  • 1Department of Chemistry and Biochemistry, Center for Electrochemistry, and the Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, 1 University Station, A5300, Austin, Texas 78712-0165, USA.

Analytical Chemistry
|May 29, 2010
PubMed
Summary
This summary is machine-generated.

We introduce snapshot voltammetry, a novel electroanalytical technique. This method uses bipolar electrodes and electrogenerated chemiluminescence (ECL) to capture optical voltammograms in a single image, offering spatial rather than temporal data.

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Area of Science:

  • Electrochemistry
  • Analytical Chemistry
  • Spectroscopy

Background:

  • Conventional voltammetry relies on temporal data acquisition.
  • Electrogenerated chemiluminescence (ECL) offers optical detection capabilities.
  • Bipolar electrodes are useful for electrochemical measurements.

Purpose of the Study:

  • To introduce a new electroanalytical technique called snapshot voltammetry.
  • To combine bipolar electrodes with ECL for optical voltammogram recording.
  • To demonstrate a spatially resolved electrochemical measurement method.

Main Methods:

  • Utilized a triangle-shaped bipolar electrode to stabilize interfacial potential.
  • Combined bipolar electrode properties with electrogenerated chemiluminescence (ECL).
  • Recorded optical voltammograms in a single micrograph (spatial domain).

Main Results:

  • Snapshot voltammetry captures electrochemical information in the spatial domain.
  • Basic electrochemical parameters from snapshot voltammetry align with conventional methods.
  • The technique allows for optical voltammogram recording in a single micrograph.

Conclusions:

  • Snapshot voltammetry is a viable new electroanalytical technique.
  • The method provides spatially resolved electrochemical data.
  • Future applications may involve arrays of bipolar electrodes for simultaneous measurements.