Related Experiment Video
Updated: Oct 8, 2025
09:18
Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
Published on: June 21, 2017
11.6K
Probing Charge Transport Kinetics in a Plasmonic Environment with Cyclic Voltammetry
Mohammad Shahabuddin1, Ashleigh K Wilson1, Ashah C Koech1
1Center for Materials Research, Norfolk State University, 700 Park Ave, Norfolk, Virginia 23504, United States.
ACS Omega
|December 29, 2021
Summary
Light illumination significantly enhances electrochemical reactions in nanostructured gold, boosting electron-transfer rates by threefold. This suggests plasmonic excitations can control electrochemical processes.
Area of Science:
- Electrochemistry
- Nanotechnology
- Plasmonics
Background:
- Electrochemical reaction kinetics are crucial for various applications.
- Nanostructured materials offer unique properties for electrochemical studies.
- Plasmonic environments can influence light-matter interactions.
Purpose of the Study:
- To investigate the impact of light illumination on electrochemical reaction kinetics in a nanostructured plasmonic environment.
- To compare the effects in nanostructured gold versus flat systems.
- To explore the potential of plasmonic excitations for controlling electrochemical reactions.
Main Methods:
- Cyclic voltammetry (CV) was employed to study electrochemical reactions.
- Experiments were conducted in a nanostructured gold environment.
- The influence of light illumination was assessed by comparing results with and without light.
Main Results:
- Light illumination significantly enhanced anodic and cathodic currents in nanostructured gold.
- The effect of light was more pronounced in nanostructured systems compared to flat systems.
- A threefold increase in the electron-transfer rate was observed under photoexcitation.
Conclusions:
- Plasmonic environments, particularly nanostructured gold, can be used to modify electrochemical reaction kinetics.
- Photoexcitation in plasmonic nanostructures offers a method for controlling electron-transfer rates.
- This research opens possibilities for utilizing plasmonic excitations in electrochemical applications.
Related Concept Videos
01:10Voltammetric Techniques: Cyclic Voltammetry
770
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...
770
01:21Voltammetry: Factors Affecting Measurements
219
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...
219
01:12Voltammetric Techniques: Linear-Scan (E vs Time)
543
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...
543
01:17Voltammetric Techniques: Pulse Voltammetry
739
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...
739
01:17Controlled-Potential Coulometry: Electrolytic Methods
330
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
The chosen potential...
330
01:16Voltammograms: Overview
341
Voltammograms are current plots as a function of applied potential, offering insights into electrochemical systems. The shape of a voltammogram depends on how the current is measured and whether convection (heat transfer by fluid movement) is present or absent.
Shapes of Voltammograms
Shapes of Voltammograms
341