Single-Entity Collisional Electrochemistry at the Micro- and/or Nano-Interface Between Two Immiscible Electrolyte Solutions

Authors

Lifang Yang, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
Jun-Jie Chen, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
Ling-Yu Chen, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
Si-Qi Jin, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
Tao-Xiong Fang, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
Si-Jia He, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
Liang-Jun Shen, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
Xin-Jian Huang, Institute of Intelligent Technology, Midea Corporate Research Center, Foshan 528311, China
Xiao-Hang Sun, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, ChinaFollow
Hai-Qiang Deng, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, ChinaFollow

Corresponding Author

Xiao-Hang Sun(sunxh25@mail.sysu.edu.cn);
Hai-Qiang Deng (denghq9@mail.sysu.edu.cn)

Abstract

Single-entity collisional electrochemistry (SECE) is a branch of single-entity electrochemistry. It can directly characterize entities/particles with single particle resolution through random collisions between particles and electrodes in a solution, and obtain rich physicochemical information, thus becoming one of the frontiers of electroanalytical chemistry in the past two decades. Interestingly, the (micro/nanoscale) sensing electrodes have evolved from a polarizable liquid/ liquid (mercury/liquid) interface to a solid/liquid interface and then to a liquid/liquid interface (i.e., an interface between two immiscible electrolyte solutions, ITIES), as if they have completed a cycle (but in fact they have not). ITIES has become the latest sensing electrode in the booming SECE due to its polarizability (up to 1.1 V at the water/a,a,a-trifluorotoluene interface) and high reproducibility. The four measurement modes (direct electrolysis, mediated electrolysis, current blockade, and charge displacement) developed in the realm of SECE at solid/liquid interfaces have also been fully realized at the miniature ITIES. This article will discuss these four modes at the ITIES from the perspectives of basic concepts, operating mechanisms, and latest developments (e.g., discovery of ionosomes, blockade effect of Faradaic ion transfer, etc.), and look forward to the future development and direction of this emerging field.

Graphical Abstract

Keywords

Single-entity collisional electrochemistry, Interface between two immiscible electrolyte solutions, Charge transfer

DOI Link

https://doi.org/10.61558/2993-074X.3495

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2024-11-28

Online Available Date

2024-09-19

Revised Date

2024-09-02

Received Date

2024-06-10

Recommended Citation

Lifang Yang, Jun-Jie Chen, Ling-Yu Chen, Si-Qi Jin, Tao-Xiong Fang, Si-Jia He, Liang-Jun Shen, Xin-Jian Huang, Xiao-Hang Sun, Hai-Qiang Deng. Single-Entity Collisional Electrochemistry at the Micro- and/or Nano-Interface Between Two Immiscible Electrolyte Solutions[J]. Journal of Electrochemistry, 2024 , 30(11): 2414005.
DOI: 10.61558/2993-074X.3495
Available at: https://jelectrochem.xmu.edu.cn/journal/vol30/iss11/2