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Why Is Voltammetric Current Scan Rate Dependent? Representation of a Mathematically Dense Concept Using Conceptual Thinking

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Title: Why Is Voltammetric Current Scan Rate Dependent? Representation of a Mathematically Dense Concept Using Conceptual Thinking
Language: English
Authors: Khalafi, Lida, Cunningham, Amber M., Hoober-Burkhardt, Lena E., Rafiee, Mohammad (ORCID 0000-0002-5325-5387)
Source: Journal of Chemical Education. Dec 2021 98(12):3957-3961.
Availability: Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Peer Reviewed: Y
Page Count: 5
Publication Date: 2021
Intended Audience: Teachers
Document Type: Journal Articles
Reports - Descriptive
Descriptors: Chemistry, Science Instruction, Science Experiments, Mathematical Concepts, Concept Formation, Energy, Electronics, Simulation, Learning Activities
DOI: 10.1021/acs.jchemed.1c00770
ISSN: 0021-9584
Abstract: Cyclic voltammetry (CV) is the most popular electrochemical technique for the study of electrode processes. One of the reasons for its popularity is its adjustable timescale which can vary several orders of magnitude simply by varying the rate at which the potential is scanned. Changing the scan rate affects CV features including the current, leading to one of the basic questions in electrochemistry: Why is voltammetric current scan rate dependent? Here, we present an activity centered around the simulation of CV and corresponding time dependent electrode processes. The activity draws students' attention to the timescale of voltammetric experiments and enables them to grasp the relationship between currents and scan rates.
Abstractor: As Provided
Entry Date: 2021
Accession Number: EJ1319537
Database: ERIC
FullText Text:
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  Data: Cyclic voltammetry (CV) is the most popular electrochemical technique for the study of electrode processes. One of the reasons for its popularity is its adjustable timescale which can vary several orders of magnitude simply by varying the rate at which the potential is scanned. Changing the scan rate affects CV features including the current, leading to one of the basic questions in electrochemistry: Why is voltammetric current scan rate dependent? Here, we present an activity centered around the simulation of CV and corresponding time dependent electrode processes. The activity draws students' attention to the timescale of voltammetric experiments and enables them to grasp the relationship between currents and scan rates.
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