Thin layer sonoelectrochemistry: Impact on slow heterogeneous electron transfer

Chester G. Duda; Brenna Parke; Johna Leddy

doi:10.1016/j.electacta.2023.143118

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Thin layer sonoelectrochemistry: Impact on slow heterogeneous electron transfer

Journal article

Peer reviewed

Thin layer sonoelectrochemistry: Impact on slow heterogeneous electron transfer

Chester G. Duda, Brenna Parke and Johna Leddy

Electrochimica acta, Vol.468, 143118

11/10/2023

DOI: 10.1016/j.electacta.2023.143118

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Abstract

In thin layer sonoelectrochemistry (TLS), constructive interference is established in a thin layer of electrolyte with a low power, ultrasonic quartz crystal oscillator (QCO). No cavitation, no temperature increase, and no impacts on mass transport are observed. In this first report of TLS experiments without cavitation, voltammetric morphologies are not disrupted. Interfacial electron transfer for three transition metal species are evaluated with established cyclic voltammetric diagnostics. For Ru(bpy)32+ with inherently fast (reversible) interfacial electron transfer, voltammograms are unchanged on sonication at 41 kHz. For Fe3＋ with slow heterogeneous electron transfer, interfacial rate increases with sonication, where increases in rate persist without diminution for minutes postsonication. For a cobalt phenanthroline probe, changes in voltammetric morphology at higher QCO intensity are consistent with chemical changes of ligand loss. Constructive interference in TLS imparts sound pressure to the electrode solution interface to increase electron transfer rates without mass transport disruption. TLS may provide means to electrocatalyze interfacial rates.

Electrocatalysis

Sonoelectrocatalysis

Sonoelectrochemistry

Sonoelectrochemistry in a thin layer

Thin layer sonoelectrochemistry

Ultrasound and electron transfer kinetics

Details

Title: Subtitle: Thin layer sonoelectrochemistry: Impact on slow heterogeneous electron transfer
Creators: Chester G. Duda - University of Iowa
Brenna Parke - University of Iowa
Johna Leddy - University of Iowa
Resource Type: Journal article
Publication Details: Electrochimica acta, Vol.468, 143118
Publisher: Elsevier Ltd
DOI: 10.1016/j.electacta.2023.143118
ISSN: 0013-4686
eISSN: 1873-3859
Grant note: DOI: 10.13039/100000001, name: National Science Foundation, award: CHE-1309366
Language: English
Electronic publication date: 09/2023
Date published: 11/10/2023
Academic Unit: Chemistry
Record Identifier: 9984464476802771

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