Electrochemical analysis of charge mediator product composition through transient model and experimental validation

Daniel Moreno, Jesse Thompson, Ayokunle Omosebi, James Landon, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Charge carriers have been studied for use in applications such as fuel cells, redox flow batteries, and electrochemical CO2 reactors for conversion to value-added products. Here, transient-based equilibrium models are developed for two well-known charge carriers: methyl viologen (MV) and ethyl viologen (EV). The models are simulated using Butler-Volmer kinetics until steady-state is reached. EV is favored over MV due to lower dimerization, and enabling over 2 × production of reduced EV+ over MV+. MV and EV products do not appear to significantly change, except only under sufficiently acidic conditions (pH < 4). Charge and energy input requirement are used to assess total system efficiency and potential for system scale-up via chronoamperometry. The charge and energy analysis performed with EV as the charge carrier reveals that optimal charging voltage is around − 0.8 to − 0.85 V vs. Ag/AgCl, which is above the minimum reduction voltage (around − 0.6 to − 0.7 V vs. Ag/AgCl) and suggest more favorable conditions for performing such charge carrier reductions. Graphical abstract: [Figure not available: see fulltext.]

Original languageEnglish
JournalJournal of Applied Electrochemistry
DOIs
StatePublished - Nov 2022

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Nature B.V.

Keywords

  • Batch cell reactor
  • Charge carrier
  • Chronoamperometry
  • Cyclic voltammetry
  • Electrocatalysis
  • Modeling
  • Speciation
  • Viologen

ASJC Scopus subject areas

  • General Chemical Engineering
  • Electrochemistry
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Electrochemical analysis of charge mediator product composition through transient model and experimental validation'. Together they form a unique fingerprint.

Cite this