Journal Article

FZJ-2023-03410

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Impedance Response of Electrochemical Interfaces: Part IV─Low-Frequency Inductive Loop for a Single-Electron Reaction

Li, C.FZJ* ; Peng, Z. ; Huang, J. (Corresponding author)FZJ*

2023
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.jpcc.3c02830  doi:10.34734/FZJ-2023-03410

Abstract: The low-frequency inductive loop is usually attributed to relaxation of adsorbed intermediates of multistep reactions in electrocatalysis and corrosion. Herein, we report a low-frequency inductive loop for a single-electron reaction when the electrode potential (EM), the equilibrium potential (Eeq), and the potential of zero charge (Epzc) are different, namely, under nonequilibrium conditions. Interestingly enough, although both reactions involve only one electron, the metal deposition reaction (M+ + e ↔ M) and the redox couple reaction (Fe(CN)63– + e ↔ Fe(CN)64–) show different impedance shapes. The low-frequency inductive loop is observed only for the M+ + e ↔ M reaction in the oxidation direction because its faradaic current has a negative phase angle due to double layer effects. Moreover, we find that the low-frequency inductive loop occurs only when the polarization curve has no diffusion-limiting features.

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Contributing Institute(s):

1. IEK-13 (IEK-13)

Research Program(s):

1. 1212 - Materials and Interfaces (POF4-121) (POF4-121)

Appears in the scientific report 2023

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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