Tuning Proton Exchange and Transport in Protic Ionic Liquid Solution through Anion Chemistry

Gongyue Huang; Luca Porcarelli; Maria Forsyth; Haijin Zhu

doi:10.1021/acs.jpclett.1c01461

Tuning Proton Exchange and Transport in Protic Ionic Liquid Solution through Anion Chemistry

Gongyue Huang, Luca Porcarelli, Maria Forsyth^*, Haijin Zhu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Herein, we demonstrate that the potential difference of proton reduction and hydrogen gas oxidation of protic ionic liquids is closely related to the proton exchange rate in the electrolyte. Through a careful design of anion chemistry, the proton exchange rate can be boosted by several orders of magnitude, reaching 200 kHz at 100 °C. It is found that the enhanced proton exchange rate can effectively decrease the potential loss at the electrode, most likely through alleviating the H+ concentration gradient incurred by electrochemical reactions at the electrode surfaces. This research therefore highlights the strategy of using anions of medium-strength acids, such as H2PO4-, for protic ionic liquids with enhanced proton exchange capability.

Original language	English
Pages (from-to)	5552-5557
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	12
Issue number	23
DOIs	https://doi.org/10.1021/acs.jpclett.1c01461
State	Published - 17 Jun 2021
Externally published	Yes

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title = "Tuning Proton Exchange and Transport in Protic Ionic Liquid Solution through Anion Chemistry",

abstract = "Herein, we demonstrate that the potential difference of proton reduction and hydrogen gas oxidation of protic ionic liquids is closely related to the proton exchange rate in the electrolyte. Through a careful design of anion chemistry, the proton exchange rate can be boosted by several orders of magnitude, reaching 200 kHz at 100 °C. It is found that the enhanced proton exchange rate can effectively decrease the potential loss at the electrode, most likely through alleviating the H+ concentration gradient incurred by electrochemical reactions at the electrode surfaces. This research therefore highlights the strategy of using anions of medium-strength acids, such as H2PO4-, for protic ionic liquids with enhanced proton exchange capability.",

author = "Gongyue Huang and Luca Porcarelli and Maria Forsyth and Haijin Zhu",

note = "Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",

year = "2021",

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doi = "10.1021/acs.jpclett.1c01461",

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journal = "Journal of Physical Chemistry Letters",

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AU - Huang, Gongyue

AU - Porcarelli, Luca

AU - Forsyth, Maria

AU - Zhu, Haijin

PY - 2021/6/17

Y1 - 2021/6/17

N2 - Herein, we demonstrate that the potential difference of proton reduction and hydrogen gas oxidation of protic ionic liquids is closely related to the proton exchange rate in the electrolyte. Through a careful design of anion chemistry, the proton exchange rate can be boosted by several orders of magnitude, reaching 200 kHz at 100 °C. It is found that the enhanced proton exchange rate can effectively decrease the potential loss at the electrode, most likely through alleviating the H+ concentration gradient incurred by electrochemical reactions at the electrode surfaces. This research therefore highlights the strategy of using anions of medium-strength acids, such as H2PO4-, for protic ionic liquids with enhanced proton exchange capability.

AB - Herein, we demonstrate that the potential difference of proton reduction and hydrogen gas oxidation of protic ionic liquids is closely related to the proton exchange rate in the electrolyte. Through a careful design of anion chemistry, the proton exchange rate can be boosted by several orders of magnitude, reaching 200 kHz at 100 °C. It is found that the enhanced proton exchange rate can effectively decrease the potential loss at the electrode, most likely through alleviating the H+ concentration gradient incurred by electrochemical reactions at the electrode surfaces. This research therefore highlights the strategy of using anions of medium-strength acids, such as H2PO4-, for protic ionic liquids with enhanced proton exchange capability.

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JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 23

ER -

Tuning Proton Exchange and Transport in Protic Ionic Liquid Solution through Anion Chemistry

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