Nanoelectrochemistry in electrochemical phase transition reactions

Mondaca-Medina, Elías; García-Carrillo, Roberto; Lee, Hyein; Wang, Yufei; Zhang, He; Ren, Hang

doi:10.1039/d3sc01857a

Cited by 4 publications

(1 citation statement)

References 74 publications

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“…Electrocrystallisation refers to the process in which metal cations are reduced by electric discharge under the action of an electric field, resulting in crystal nucleation of metal atoms and metal formation [1][2][3]. The crystallisation process of electrocrystallisation nucleation, which directly determines the composition, structure and properties of sediments, is the core problem in electrochemical research and the cornerstone of electrodeposition technology development [4,5].…”

Section: Introductionmentioning

confidence: 99%

The Establishment of Current Transient of Nucleation and Growth under Diffusion-Controlled Electrocrystallisation: A Microreview

Luo,

Yuan,

Cai

et al. 2024

Coatings

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In this microreview, the importance of electrochemical phase formation is outlined. Further, the establishment of current transition during electrochemical nucleation and growth is explored. First, the microreaction kinetic process of electrocrystallisation and the rate-controlling steps of electrodeposition are carefully discussed. Then, the current transient formulation under electrochemical polarisation-controlled electrocrystallisation is summarised. Finally, a summary of the process for calculating the current transient formulation of nucleation and growth under diffusion-controlled electrocrystallisation is explained in detail.

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Section: Introductionmentioning

confidence: 99%

The Establishment of Current Transient of Nucleation and Growth under Diffusion-Controlled Electrocrystallisation: A Microreview

Luo,

Yuan,

Cai

et al. 2024

Coatings

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Applications of model electrode for investigations of reaction and transport issues in proton exchange membrane water electrolyzer

Zhao,

Yuan,

Cheng

et al. 2025

Current Opinion in Electrochemistry

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Site-Specific Stochastic Rates and Energetics of Ag Nucleation on Highly Ordered Pyrolytic Graphite

Mondaca-Medina,

Ren

2024

ACS Nano

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Nucleation is a fundamentally important step in electrochemical phase transition reactions, e.g., in electrodeposition, which is pertinent for emerging battery technology, nanoparticle synthesis, and many industrial processes. Surface defects have been suggested to enhance nucleation rates. However, directly quantifying the nucleation rates at specific surface sites is challenging due to the ensemble averaging effect in bulk measurements. Herein, we report the measurement of rates and energetics of electronucleation across the model surface of highly oriented pyrolytic graphite (HOPG). Specifically, scanning electrochemical cell microscopy (SECCM) is used to confine the nucleation spatially in the nanoscale cell, allowing one nucleation event to be measured at one time. The scanning capability further allows the mapping of Ag nucleation at the step edge vs basal plane. A stochastic model is developed to extract the nucleation rate and energetics from voltammetric experiments. We observed a ∼57 mV difference in the median nucleation overpotential between the step edge and basal plane, corresponding to a ∼12 kJ mol −1 difference in the nucleation energy barrier. The voltammetric method to measure the nucleation rate explored here can be extended to understand the heterogeneity of nucleation rates in other electrochemical nucleation systems, e.g., metal anode batteries.

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Nanoelectrochemistry in electrochemical phase transition reactions

Abstract: Electrochemical phase transition is important in a range of processes, including gas generation in fuel cells and electrolyzers, as well as in electrodeposition in battery and metal production. Nucleation is...

Cited by 4 publications

References 74 publications

The Establishment of Current Transient of Nucleation and Growth under Diffusion-Controlled Electrocrystallisation: A Microreview

The Establishment of Current Transient of Nucleation and Growth under Diffusion-Controlled Electrocrystallisation: A Microreview

Applications of model electrode for investigations of reaction and transport issues in proton exchange membrane water electrolyzer

Site-Specific Stochastic Rates and Energetics of Ag Nucleation on Highly Ordered Pyrolytic Graphite

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